204 results on '"Faugel, H"'
Search Results
52. New diagnostics developments on IShTAR
- Author
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Crombe, K., Kostic, A., Nikiforov, A., Ochoukov, R., Shesterikov, I., Usoltceva, M., Verstrynge, T., Faugel, H., Fünfgelder, H., Heuraux, S., Noterdaeme, J., and IShTAR Team
- Subjects
Physics and Astronomy - Published
- 2018
53. IShTAR: A test facility to study the interaction between RF wave and edge plasmas
- Author
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Shesterikov, I., primary, Crombe, K., additional, Kostic, A., additional, Sitnikov, D. A., additional, Usoltceva, M., additional, Ochoukov, R., additional, Heuraux, S., additional, Moritz, J., additional, Faudot, E., additional, Fischer, F., additional, Faugel, H., additional, Fünfgelder, H., additional, Siegl, G., additional, and Noterdaeme, J.-M., additional
- Published
- 2019
- Full Text
- View/download PDF
54. Overview of physics studies on ASDEX Upgrade
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Meyer, H., primary, Angioni, C., additional, Albert, C.G., additional, Arden, N., additional, Arredondo Parra, R., additional, Asunta, O., additional, de Baar, M., additional, Balden, M., additional, Bandaru, V., additional, Behler, K., additional, Bergmann, A., additional, Bernardo, J., additional, Bernert, M., additional, Biancalani, A., additional, Bilato, R., additional, Birkenmeier, G., additional, Blanken, T.C., additional, Bobkov, V., additional, Bock, A., additional, Bolzonella, T., additional, Bortolon, A., additional, Böswirth, B., additional, Bottereau, C., additional, Bottino, A., additional, van den Brand, H., additional, Brezinsek, S., additional, Brida, D., additional, Brochard, F., additional, Bruhn, C., additional, Buchanan, J., additional, Buhler, A., additional, Burckhart, A., additional, Camenen, Y., additional, Carlton, D., additional, Carr, M., additional, Carralero, D., additional, Castaldo, C., additional, Cavedon, M., additional, Cazzaniga, C., additional, Ceccuzzi, S., additional, Challis, C., additional, Chankin, A., additional, Chapman, S., additional, Cianfarani, C., additional, Clairet, F., additional, Coda, S., additional, Coelho, R., additional, Coenen, J.W., additional, Colas, L., additional, Conway, G.D., additional, Costea, S., additional, Coster, D.P., additional, Cote, T.B., additional, Creely, A., additional, Croci, G., additional, Cseh, G., additional, Czarnecka, A., additional, Cziegler, I., additional, D’Arcangelo, O., additional, David, P., additional, Day, C., additional, Delogu, R., additional, de Marné, P., additional, Denk, S.S., additional, Denner, P., additional, Dibon, M., additional, Di Siena, A., additional, Douai, D., additional, Drenik, A., additional, Drube, R., additional, Dunne, M., additional, Duval, B.P., additional, Dux, R., additional, Eich, T., additional, Elgeti, S., additional, Engelhardt, K., additional, Erdös, B., additional, Erofeev, I., additional, Esposito, B., additional, Fable, E., additional, Faitsch, M., additional, Fantz, U., additional, Faugel, H., additional, Faust, I., additional, Felici, F., additional, Ferreira, J., additional, Fietz, S., additional, Figuereido, A., additional, Fischer, R., additional, Ford, O., additional, Frassinetti, L., additional, Freethy, S., additional, Fröschle, M., additional, Fuchert, G., additional, Fuchs, J.C., additional, Fünfgelder, H., additional, Galazka, K., additional, Galdon-Quiroga, J., additional, Gallo, A., additional, Gao, Y., additional, Garavaglia, S., additional, Garcia-Carrasco, A., additional, Garcia-Muñoz, M., additional, Geiger, B., additional, Giannone, L., additional, Gil, L., additional, Giovannozzi, E., additional, Gleason-González, C., additional, Glöggler, S., additional, Gobbin, M., additional, Görler, T., additional, Gomez Ortiz, I., additional, Gonzalez Martin, J., additional, Goodman, T., additional, Gorini, G., additional, Gradic, D., additional, Gräter, A., additional, Granucci, G., additional, Greuner, H., additional, Griener, M., additional, Groth, M., additional, Gude, A., additional, Günter, S., additional, Guimarais, L., additional, Haas, G., additional, Hakola, A.H., additional, Ham, C., additional, Happel, T., additional, den Harder, N., additional, Harrer, G.F., additional, Harrison, J., additional, Hauer, V., additional, Hayward-Schneider, T., additional, Hegna, C.C., additional, Heinemann, B., additional, Heinzel, S., additional, Hellsten, T., additional, Henderson, S., additional, Hennequin, P., additional, Herrmann, A., additional, Heyn, M.F., additional, Heyn, E., additional, Hitzler, F., additional, Hobirk, J., additional, Höfler, K., additional, Hölzl, M., additional, Höschen, T., additional, Holm, J.H., additional, Hopf, C., additional, Hornsby, W.A., additional, Horvath, L., additional, Houben, A., additional, Huber, A., additional, Igochine, V., additional, Ilkei, T., additional, Ivanova-Stanik, I., additional, Jacob, W., additional, Jacobsen, A.S., additional, Janky, F., additional, Jansen van Vuuren, A., additional, Jardin, A., additional, Jaulmes, F., additional, Jenko, F., additional, Jensen, T., additional, Joffrin, E., additional, Käsemann, C.-P., additional, Kallenbach, A., additional, Kálvin, S., additional, Kantor, M., additional, Kappatou, A., additional, Kardaun, O., additional, Karhunen, J., additional, Kasilov, S., additional, Kazakov, Y., additional, Kernbichler, W., additional, Kirk, A., additional, Kjer Hansen, S., additional, Klevarova, V., additional, Kocsis, G., additional, Köhn, A., additional, Koubiti, M., additional, Krieger, K., additional, Krivska, A., additional, Krämer-Flecken, A., additional, Kudlacek, O., additional, Kurki-Suonio, T., additional, Kurzan, B., additional, Labit, B., additional, Lackner, K., additional, Laggner, F., additional, Lang, P.T., additional, Lauber, P., additional, Lebschy, A., additional, Leuthold, N., additional, Li, M., additional, Linder, O., additional, Lipschultz, B., additional, Liu, F., additional, Liu, Y., additional, Lohs, A., additional, Lu, Z., additional, Luda di Cortemiglia, T., additional, Luhmann, N.C., additional, Lunsford, R., additional, Lunt, T., additional, Lyssoivan, A., additional, Maceina, T., additional, Madsen, J., additional, Maggiora, R., additional, Maier, H., additional, Maj, O., additional, Mailloux, J., additional, Maingi, R., additional, Maljaars, E., additional, Manas, P., additional, Mancini, A., additional, Manhard, A., additional, Manso, M.-E., additional, Mantica, P., additional, Mantsinen, M., additional, Manz, P., additional, Maraschek, M., additional, Martens, C., additional, Martin, P., additional, Marrelli, L., additional, Martitsch, A., additional, Mayer, M., additional, Mazon, D., additional, McCarthy, P.J., additional, McDermott, R., additional, Meister, H., additional, Medvedeva, A., additional, Merkel, R., additional, Merle, A., additional, Mertens, V., additional, Meshcheriakov, D., additional, Meyer, O., additional, Miettunen, J., additional, Milanesio, D., additional, Mink, F., additional, Mlynek, A., additional, Monaco, F., additional, Moon, C., additional, Nabais, F., additional, Nemes-Czopf, A., additional, Neu, G., additional, Neu, R., additional, Nielsen, A.H., additional, Nielsen, S.K., additional, Nikolaeva, V., additional, Nocente, M., additional, Noterdaeme, J.-M., additional, Novikau, I., additional, Nowak, S., additional, Oberkofler, M., additional, Oberparleiter, M., additional, Ochoukov, R., additional, Odstrcil, T., additional, Olsen, J., additional, Orain, F., additional, Palermo, F., additional, Pan, O., additional, Papp, G., additional, Paradela Perez, I., additional, Pau, A., additional, Pautasso, G., additional, Penzel, F., additional, Petersson, P., additional, Pinzón Acosta, J., additional, Piovesan, P., additional, Piron, C., additional, Pitts, R., additional, Plank, U., additional, Plaum, B., additional, Ploeckl, B., additional, Plyusnin, V., additional, Pokol, G., additional, Poli, E., additional, Porte, L., additional, Potzel, S., additional, Prisiazhniuk, D., additional, Pütterich, T., additional, Ramisch, M., additional, Rasmussen, J., additional, Rattá, G.A., additional, Ratynskaia, S., additional, Raupp, G., additional, Ravera, G.L., additional, Réfy, D., additional, Reich, M., additional, Reimold, F., additional, Reiser, D., additional, Ribeiro, T., additional, Riesch, J., additional, Riedl, R., additional, Rittich, D., additional, Rivero-Rodriguez, J.F., additional, Rocchi, G., additional, Rodriguez-Ramos, M., additional, Rohde, V., additional, Ross, A., additional, Rott, M., additional, Rubel, M., additional, Ryan, D., additional, Ryter, F., additional, Saarelma, S., additional, Salewski, M., additional, Salmi, A., additional, Sanchis-Sanchez, L., additional, Santos, J., additional, Sauter, O., additional, Scarabosio, A., additional, Schall, G., additional, Schmid, K., additional, Schmitz, O., additional, Schneider, P.A., additional, Schrittwieser, R., additional, Schubert, M., additional, Schwarz-Selinger, T., additional, Schweinzer, J., additional, Scott, B., additional, Sehmer, T., additional, Seliunin, E., additional, Sertoli, M., additional, Shabbir, A., additional, Shalpegin, A., additional, Shao, L., additional, Sharapov, S., additional, Sias, G., additional, Siccinio, M., additional, Sieglin, B., additional, Sigalov, A., additional, Silva, A., additional, Silva, C., additional, Silvagni, D., additional, Simon, P., additional, Simpson, J., additional, Smigelskis, E., additional, Snicker, A., additional, Sommariva, C., additional, Sozzi, C., additional, Spolaore, M., additional, Stegmeir, A., additional, Stejner, M., additional, Stober, J., additional, Stroth, U., additional, Strumberger, E., additional, Suarez, G., additional, Sun, H.-J., additional, Suttrop, W., additional, Sytova, E., additional, Szepesi, T., additional, Tál, B., additional, Tala, T., additional, Tardini, G., additional, Tardocchi, M., additional, Teschke, M., additional, Terranova, D., additional, Tierens, W., additional, Thorén, E., additional, Told, D., additional, Tolias, P., additional, Tudisco, O., additional, Treutterer, W., additional, Trier, E., additional, Tripský, M., additional, Valisa, M., additional, Valovic, M., additional, Vanovac, B., additional, van Vugt, D., additional, Varoutis, S., additional, Verdoolaege, G., additional, Vianello, N., additional, Vicente, J., additional, Vierle, T., additional, Viezzer, E., additional, von Toussaint, U., additional, Wagner, D., additional, Wang, N., additional, Wang, X., additional, Weiland, M., additional, White, A.E., additional, Wiesen, S., additional, Willensdorfer, M., additional, Wiringer, B., additional, Wischmeier, M., additional, Wolf, R., additional, Wolfrum, E., additional, Xiang, L., additional, Yang, Q., additional, Yang, Z., additional, Yu, Q., additional, Zagórski, R., additional, Zammuto, I., additional, Zhang, W., additional, van Zeeland, M., additional, Zehetbauer, T., additional, Zilker, M., additional, Zoletnik, S., additional, and Zohm, H., additional
- Published
- 2019
- Full Text
- View/download PDF
55. Impact of ICRF on the scrape-off layer and on plasma wall interactions: From present experiments to fusion reactor
- Author
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Bobkov, V., primary, Aguiam, D., additional, Bilato, R., additional, Brezinsek, S., additional, Colas, L., additional, Czarnecka, A., additional, Dumortier, P., additional, Dux, R., additional, Faugel, H., additional, Fünfgelder, H., additional, Jacquet, Ph., additional, Kallenbach, A., additional, Krivska, A., additional, Klepper, C.C., additional, Lerche, E., additional, Lin, Y., additional, Milanesio, D., additional, Maggiora, R., additional, Monakhov, I., additional, Neu, R., additional, Noterdaeme, J.-M., additional, Ochoukov, R., additional, Pütterich, Th., additional, Reinke, M., additional, Tierens, W., additional, Tuccilo, A., additional, Tudisco, O., additional, Van Eester, D., additional, Wright, J., additional, Wukitch, S., additional, and Zhang, W., additional
- Published
- 2019
- Full Text
- View/download PDF
56. Observations of core ion cyclotron emission on ASDEX Upgrade tokamak
- Author
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Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Comunidad Europea de Energía Atómica (EURATOM). E. U., Ochoukov, R., Bobkov, V., Chapman, B., Dendy, R. O., Dunne, M. G., Faugel, H., García Muñoz, Manuel, Noterdaeme, J. M., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Comunidad Europea de Energía Atómica (EURATOM). E. U., Ochoukov, R., Bobkov, V., Chapman, B., Dendy, R. O., Dunne, M. G., Faugel, H., García Muñoz, Manuel, and Noterdaeme, J. M.
- Abstract
The B-dot probe diagnostic suite on the ASDEX Upgrade tokamak has recently been upgraded with a new 125 MHz, 14 bit resolution digitizer to study ion cyclotron emission (ICE). While classic edge emission from the low field side plasma is often observed, we also measure waves originating from the core with fast fusion protons or beam injected deuterons being a possible emission driver. Comparing the measured frequency values with ion cyclotron harmonics present in the plasma places the origin of this emission on the magnetic axis, with the fundamental hydrogen/second deuterium cyclotron harmonic matching the observed values. The actual values range from ∼27 MHz at the on-axis toroidal field BT = −1.79 T to ∼40 MHz at BT = −2.62 T. When the magnetic axis position evolves during this emission, the measured frequency values track the changes in the estimated on-axis cyclotron frequency values. Core ICE is usually a transient event lasting ∼100 ms during the neutral beam startup phase. However, in some cases, core emission occurs in steady-state plasmas and lasts for longer than 1 s. These observations suggest an attractive possibility of using a non-perturbing ICE-based diagnostic to passively monitor fusion alpha particles at the location of their birth in the plasma core, in deuterium-tritium burning devices such as ITER and DEMO.
- Published
- 2018
57. ICRF system enhancements at ASDEX upgrade
- Author
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Braun, F, Hofmeister, F, Wesner, F, Becker, W, Faugel, H, Hartmann, D, and Noterdaeme, J.-M
- Published
- 2001
- Full Text
- View/download PDF
58. Developments on and Plans for IShTAR
- Author
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Noterdaeme, J-M., Crombé, K., D’Inca, R., Devaux, Stéphane, Faudot, Eric, Faugel, H., Fünfgelder, H., Heuraux, Stéphane, Jacquot, J., Kostic, A., Moritz, Jérôme, Nikiforov, A., Ochoukov, R., Tripský, M., Usoltceva, Mariia, Wauters, T., heuraux, stéphane, Max-Planck-Institut für Plasmaphysik [Garching] (IPP), Laboratoire de physique des plasmas de l'ERM, Laboratorium voor plasmafysica van de KMS (LPP ERM KMS), Ecole Royale Militaire / Koninklijke Militaire School (ERM KMS), Institut Jean Lamour (IJL), and Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] ,[PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] - Abstract
International audience; IShTAR (Ion Sheath Test ARrangement) is a linear magnetic facility developed by and operated at the Max-Planck-Institut für Plasmaphysik (IPP) in Garching in cooperation with several universities and institutes. It is equipped with a helicon plasma source and an ICRF (Ion Cyclotron Resonant Frequency) single strap antenna. It is used to investigate the interactions between the launched wave and a plasma that is representative (plasma density, temperature and wave propagation) for a tokamak edge.Whereas the device was originally meant to develop the tools to measure the electric field produced by the ICRF wave inside the sheath on the antenna limiters in order to provide data to check and benchmark the RF sheath models, it can actually provide major contributions in many other areas related to plasma production and RF-plasma interactions. Just to name a few:- helicon physics: the helicon has one of the largest diameter in the world and will soon be equipped with a major power upgrade (up to 750 kW generator power between 3.9 MHz and 26.1 MHz);- refinement of RF fields measurement methods: by comparing the modelling of the electromagnetic field distribution (including eigenmodes and superposition of the fields of helicon and RF antenna) inside the vessel with the measurements;- RF plasma production and modelling: the device was used to test plasma production for RF wall cleaning, and to investigate for which conditions the plasma is initiated inside the antenna box. It is essential to avoid such phenomenon in high power ICRF system on tokamak, but IShTAR provides the liberty for detailed investigations of the conditions under which these to-be-avoided phenomena occur.IShTAR is further designed as an experimental platform dedicated to international co-operations: to improve remote access for participants, it is equipped with an intranet to manage the operations and the documentation. The processing system has sharable notebooks and remote access to the discharge database is possible.
- Published
- 2017
59. Recent ASDEX Upgrade research in support of ITER and DEMO
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Zohm, H, Ahn, J, Aho Mantila, L, Äkäslompolo, S, Angioni, C, Asunta, O, de Baar, M, Balden, M, Barrera Orte, L, Behler, K, Belapure, J, Bergmann, A, Bernardo, J, Bernert, M, Beurskens, M, Biancalani, A, Bilato, R, Birkenmeier, G, Bobkov, V, Bock, A, Bogomolov, A, Bolzonella, T, Boom, J, Böswirth, B, Bottereau, C, Bottino, A, van den Brand, H, Braun, F, Brezinsek, S, Brochard, F, Buhler, A, Burckhart, A, Camenen, Y, Carvalho, P, Carrasco, G, Cazzaniga, C, Carralero, D, Casali, L, Cavedon, M, Challis, C, Chankin, A, Chapman, I, Clairet, F, Classen, I, Coda, S, Coelho, R, Coenen, J, Colas, L, Conway, G, Costea, S, Coster, D, CROCI, GABRIELE, Cseh, G, Czarnecka, A, Day, C, de Marné, P, Denner, P, D'Inca, R, Douai, D, Drube, R, Dunne, M, Duval, B, Dux, R, Eich, T, Elgeti, S, Engelhardt, K, Ertl, K, Esposito, B, Fable, E, Fantz, U, Faugel, H, Felici, F, Fietz, S, Figueredo, A, Fischer, R, Ford, O, Franzen, P, Frassinetti, L, Fröschle, M, Fuchert, G, Fünfgelder, H, Fuchs, J, Gál, K, Garavaglia, S, Garcia Muñoz, M, Geiger, B, Giannone, L, Giovannozzi, E, Gleason González, C, Görler, T, Goodman, T, GORINI, GIUSEPPE, da Graca, S, Gräter, A, Granucci, G, Greuner, H, Grießhammer, J, Groth, M, Gude, A, Günter, S, Guimarais, L, Haas, G, Hakola, A, Happel, T, Harrison, J, Hatch, D, Hauer, V, Hauff, T, Heinemann, B, Heinzel, S, Hellsten, T, Hennequin, P, Herrmann, A, Heyn, E, Hobirk, J, Hölzl, M, Höschen, T, Holm, J, Hopf, C, Hoppe, F, Horvath, L, Houben, A, Huber, A, Igochine, V, Ilkei, T, Jacob, W, Jacobsen, A, Jacquot, J, Janzer, M, Jaulmes, F, Jenko, F, Jensen, T, Joffrin, E, Käsemann, C, Kallenbach, A, Kálvin, S, Kantor, M, Kappatou, A, Kardaun, O, Karhunen, J, Kim, D, Kimmig, S, Kirk, A, J, Klingshirn, H, Kocan, M, Koch, F, Kocsis, G, Köhn, A, Köppen, M, Kötterl, J, Koslowski, R, Koubiti, M, Kraus, M, Krieger, K, Krivska, A, Kogut, D, Krämer Flecken, A, Kurki Suonio, T, Kurzan, B, Lackner, K, Laggner, F, Lang, P, Lauber, P, Lazányi, N, Lazaros, A, Lebschy, A, Leuterer, F, Liang, Y, Linsmeier, h, Lipschultz, B, Litnovski, A, Lohs, A, Luhmann, N, Lunt, T, Lyssoivan, A, Madsen, J, Maier, H, Maj, O, Mailloux, J, Maljaars, E, Mancini, A, Manhard, A, Mank, K, E, Manso, M, Mantica, P, Mantsinen, M, Manz, P, Maraschek, M, Markina, E, Martens, C, Martin, P, Mayer, A, Mayer, M, Mazon, D, McCarthy, P, McDermott, R, Meisl, G, Meister, H, Medvedeva, A, Merkel, P, Merkel, R, Mertens, V, Meyer, H, Meyer, O, Milanesio, D, Miettunen, J, Mlynek, A, Monaco, F, Moro, A, Moseev, D, Müller, H, Müller, S, Münich, M, Nabais, F, Nemes Czopf, A, Neu, G, Neu, R, Nielsen, A, Nikolaeva, V, Nielsen, S, NOCENTE, MASSIMO, Nold, B, M, Noterdaeme, J, Nowak, S, Oberkofler, M, Ochoukov, R, Odstrcil, T, Papp, G, Park, H, Pau, A, Pautasso, G, Penzel, F, Petersson, P, Piovesan, P, Piron, C, Plaum, B, Plöckl, B, Plyusnin, V, Podoba, Y, Pokol, G, Pompon, F, Poli, E, Polozhiy, K, Porte, L, Potzel, S, Preuss, R, Prisiazhniuk, D, Pütterich, T, Ramish, M, Rapson, C, Rasmussen, J, Rathgeber, S, Raupp, G, Réfy, D, Reich, M, Reimold, F, Reinke, M, Ribeiro, T, Riedl, R, Rittich, D, Rocchi, G, Rodriguez Ramos, M, Rohde, V, Roth, J, Rott, M, Rubel, M, Ryter, F, Saarelma, S, Salewski, M, Salmi, A, Sanchis Sanchez, L, Santos, G, Santos, J, Sauter, O, Scarabosio, A, Schall, G, Schmid, K, Schmitz, O, Schneider, P, Schneider, W, Schneller, M, Schrittwieser, R, Schubert, M, Schwarz Selinger, T, Schweinzer, J, Scott, B, Sehmer, T, Sertoli, M, Shalpegin, A, Sias, G, Siccinio, M, Sieglin, B, Sigalov, A, Silva, A, Silva, C, Simon, P, Simpson, J, Snicker, A, Sommer, F, Sozzi, C, Spolaore, M, Stejner, M, Stober, J, Stobbe, F, Stroth, U, Strumberger, E, Sugiyama, K, J, Sun, Suttrop, W, Szepesi, T, Tál, B, Tala, T, Tardini, G, Tichmann, C, Told, D, Tophøj, L, Tudisco, O, von Toussaint, U, Trevisan, G, Treutterer, W, Tripský, M, Valisa, M, Valovic, M, Varela, P, Varoutis, S, Vezinet, D, Vianello, N, Vicente, J, Vierle, T, Viezzer, E, Vorpahl, C, Wagner, D, Wang, X, Wauters, T, Weidl, I, Weiland, M, Weller, A, Wenninger, R, Wieland, B, Wiesinger, M, Willensdorfer, M, Wiringer, B, Wischmeier, M, Wolf, R, Wolfrum, E, Wünderlich, D, Würsching, E, Yang, Z, Yu, Q, Zammuto, I, Zarzoso, D, Zasche, D, van Zeeland, M, Zehetbauer, T, Zilker, M., Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, European Commission (EC), Science and Technology of Nuclear Fusion, Zohm, H, Ahn, J, Aho Mantila, L, Äkäslompolo, S, Angioni, C, Asunta, O, de Baar, M, Balden, M, Barrera Orte, L, Behler, K, Belapure, J, Bergmann, A, Bernardo, J, Bernert, M, Beurskens, M, Biancalani, A, Bilato, R, Birkenmeier, G, Bobkov, V, Bock, A, Bogomolov, A, Bolzonella, T, Boom, J, Böswirth, B, Bottereau, C, Bottino, A, van den Brand, H, Braun, F, Brezinsek, S, Brochard, F, Buhler, A, Burckhart, A, Camenen, Y, Carvalho, P, Carrasco, G, Cazzaniga, C, Carralero, D, Casali, L, Cavedon, M, Challis, C, Chankin, A, Chapman, I, Clairet, F, Classen, I, Coda, S, Coelho, R, Coenen, J, Colas, L, Conway, G, Costea, S, Coster, D, Croci, G, Cseh, G, Czarnecka, A, Day, C, de Marné, P, Denner, P, D'Inca, R, Douai, D, Drube, R, Dunne, M, Duval, B, Dux, R, Eich, T, Elgeti, S, Engelhardt, K, Ertl, K, Esposito, B, Fable, E, Fantz, U, Faugel, H, Felici, F, Fietz, S, Figueredo, A, Fischer, R, Ford, O, Franzen, P, Frassinetti, L, Fröschle, M, Fuchert, G, Fünfgelder, H, Fuchs, J, Gál, K, Garavaglia, S, Garcia Muñoz, M, Geiger, B, Giannone, L, Giovannozzi, E, Gleason González, C, Görler, T, Goodman, T, Gorini, G, da Graca, S, Gräter, A, Granucci, G, Greuner, H, Grießhammer, J, Groth, M, Gude, A, Günter, S, Guimarais, L, Haas, G, Hakola, A, Happel, T, Harrison, J, Hatch, D, Hauer, V, Hauff, T, Heinemann, B, Heinzel, S, Hellsten, T, Hennequin, P, Herrmann, A, Heyn, E, Hobirk, J, Hölzl, M, Höschen, T, Holm, J, Hopf, C, Hoppe, F, Horvath, L, Houben, A, Huber, A, Igochine, V, Ilkei, T, Jacob, W, Jacobsen, A, Jacquot, J, Janzer, M, Jaulmes, F, Jenko, F, Jensen, T, Joffrin, E, Käsemann, C, Kallenbach, A, Kálvin, S, Kantor, M, Kappatou, A, Kardaun, O, Karhunen, J, Kim, D, Kimmig, S, Kirk, A, J, K, H, Kocan, M, Koch, F, Kocsis, G, Köhn, A, Köppen, M, Kötterl, J, Koslowski, R, Koubiti, M, Kraus, M, Krieger, K, Krivska, A, Kogut, D, Krämer Flecken, A, Kurki Suonio, T, Kurzan, B, Lackner, K, Laggner, F, Lang, P, Lauber, P, Lazányi, N, Lazaros, A, Lebschy, A, Leuterer, F, Liang, Y, Linsmeier, H, Lipschultz, B, Litnovski, A, Lohs, A, Luhmann, N, Lunt, T, Lyssoivan, A, Madsen, J, Maier, H, Maj, O, Mailloux, J, Maljaars, E, Mancini, A, Manhard, A, Mank, K, E, M, M, Mantica, P, Mantsinen, M, Manz, P, Maraschek, M, Markina, E, Martens, C, Martin, P, Mayer, A, Mayer, M, Mazon, D, Mccarthy, P, Mcdermott, R, Meisl, G, Meister, H, Medvedeva, A, Merkel, P, Merkel, R, Mertens, V, Meyer, H, Meyer, O, Milanesio, D, Miettunen, J, Mlynek, A, Monaco, F, Moro, A, Moseev, D, Müller, H, Müller, S, Münich, M, Nabais, F, Nemes Czopf, A, Neu, G, Neu, R, Nielsen, A, Nikolaeva, V, Nielsen, S, Nocente, M, Nold, B, M, N, J, Nowak, S, Oberkofler, M, Ochoukov, R, Odstrcil, T, Papp, G, Park, H, Pau, A, Pautasso, G, Penzel, F, Petersson, P, Piovesan, P, Piron, C, Plaum, B, Plöckl, B, Plyusnin, V, Podoba, Y, Pokol, G, Pompon, F, Poli, E, Polozhiy, K, Porte, L, Potzel, S, Preuss, R, Prisiazhniuk, D, Pütterich, T, Ramish, M, Rapson, C, Rasmussen, J, Rathgeber, S, Raupp, G, Réfy, D, Reich, M, Reimold, F, Reinke, M, Ribeiro, T, Riedl, R, Rittich, D, Rocchi, G, Rodriguez Ramos, M, Rohde, V, Roth, J, Rott, M, Rubel, M, Ryter, F, Saarelma, S, Salewski, M, Salmi, A, Sanchis Sanchez, L, Santos, G, Santos, J, Sauter, O, Scarabosio, A, Schall, G, Schmid, K, Schmitz, O, Schneider, P, Schneider, W, Schneller, M, Schrittwieser, R, Schubert, M, Schwarz Selinger, T, Schweinzer, J, Scott, B, Sehmer, T, Sertoli, M, Shalpegin, A, Sias, G, Siccinio, M, Sieglin, B, Sigalov, A, Silva, A, Silva, C, Simon, P, Simpson, J, Snicker, A, Sommer, F, Sozzi, C, Spolaore, M, Stejner, M, Stober, J, Stobbe, F, Stroth, U, Strumberger, E, Sugiyama, K, J, S, Suttrop, W, Szepesi, T, Tál, B, Tala, T, Tardini, G, Tichmann, C, Told, D, Tophøj, L, Tudisco, O, von Toussaint, U, Trevisan, G, Treutterer, W, Tripský, M, Valisa, M, Valovic, M, Varela, P, Varoutis, S, Vezinet, D, Vianello, N, Vicente, J, Vierle, T, Viezzer, E, Vorpahl, C, Wagner, D, Wang, X, Wauters, T, Weidl, I, Weiland, M, Weller, A, Wenninger, R, Wieland, B, Wiesinger, M, Willensdorfer, M, Wiringer, B, Wischmeier, M, Wolf, R, Wolfrum, E, Wünderlich, D, Würsching, E, Yang, Z, Yu, Q, Zammuto, I, Zarzoso, D, Zasche, D, van Zeeland, M, Zehetbauer, T, Zilker, M, Max-Planck-Institut für Plasmaphysik [Garching] (IPP), Physique des interactions ioniques et moléculaires (PIIM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society, and EUROfusion MST1 Team
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Nuclear and High Energy Physics ,Tokamak ,Cyclotron ,Condensed Matter Physic ,Collisionality ,01 natural sciences ,Resonant magnetic perturbations ,Electron cyclotron resonance ,010305 fluids & plasmas ,law.invention ,Nuclear physics ,ASDEX Upgrade ,[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] ,law ,ITER ,0103 physical sciences ,010306 general physics ,Edge-localized mode ,tokamak physic ,DEMO ,nuclear fusion ,Physics ,Divertor ,Condensed Matter Physics ,Tokamak physics ,Nuclear fusion ,tokamak physics - Abstract
Recent experiments on the ASDEX Upgrade tokamak aim at improving the physics base for ITER and DEMO to aid the machine design and prepare efficient operation. Type I edge localized mode (ELM) mitigation using resonant magnetic perturbations (RMPs) has been shown at low pedestal collisionality ( ν ∗ ped < 0 . 4 ) . In contrast to the previous high ν ∗ regime, suppression only occurs in a narrow RMP spectral window, indicating a resonant process, and a concomitant confinement drop is observed due to a reduction of pedestal top density and electron temperature. Strong evidence is found for the ion heat flux to be the decisive element for the L–H power threshold. A physics based scaling of the density at which the minimum P LH occurs indicates that ITER could take advantage of it to initiate H-mode at lower density than that of the final Q = 10 operational point. Core density fluctuation measurements resolved in radius and wave number show that an increase of R/L T e introduced by off-axis electron cyclotron resonance heating (ECRH) mainly increases the large scale fluctuations. The radial variation of the fluctuation level is in agreement with simulations using the GENE code. Fast particles are shown to undergo classical slowing down in the absence of large scale magnetohydrodynamic (MHD) events and for low heating power, but show signs of anomalous radial redistribution at large heating power, consistent with a broadened off-axis neutral beam current drive current profile under these conditions. Neoclassical tearing mode (NTM) suppression experiments using electron cyclotron current drive (ECCD) with feedback controlled deposition have allowed to test several control strategies for ITER, including automated control of (3,2) and (2,1) NTMs during a single discharge. Disruption mitigation studies using massive gas injection (MGI) can show an increased fuelling efficiency with high field side injection, but a saturation of the fuelling efficiency is observed at high injected mass as needed for runaway electron suppression. Large locked modes can significantly decrease the fuelling efficiency and increase the asymmetry of radiated power during MGI mitigation. Concerning power exhaust, the partially detached ITER divertor scenario has been demonstrated at P sep /R = 10 MW m − 1 in ASDEX Upgrade, with a peak time averaged target load around 5MWm − 2 , well consistent with the component limits for ITER. Developing this towards DEMO, full detachment was achieved at P sep /R = 7MWm − 1 and stationary discharges with core radiation fraction of the order of DEMO requirements (70% instead of the 30% needed for ITER) were demonstrated. Finally, it remains difficult to establish the standard ITER Q = 10 scenario at low q 95 = 3 in the all-tungsten (all-W) ASDEX Upgrade due to the observed poor confinement at low β N . This is mainly due to a degraded pedestal performance and hence investigations at shifting the operational point to higher β N by lowering the current have been started. At higher q 95 , pedestal performance can be recovered by seeding N 2 as well as CD 4 , which is interpreted as improved pedestal stability due to the decrease of bootstrap current with increasing Z eff . Concerning advanced scenarios, the upgrade of ECRH power has allowed experiments with central ctr-ECCD to modify the q -profile in improved H-mode scenarios, showing an increase in confinement at still good MHD stability with flat elevated q -profiles at values between 1.5 and 2. European Commission (EUROfusion 633053)
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- 2015
60. Ion temperature measurement techniques using fast sweeping retarding field analyzer (RFA) in strongly intermittent ASDEX Upgrade tokamak plasmas.
- Author
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Ochoukov, R., Dreval, M., Bobkov, V., Faugel, H., Herrmann, A., Kammerloher, L., and Leitenstern, P.
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ION temperature ,TEMPERATURE measurements ,STATISTICAL measurement ,PROBABILITY density function ,FAST ions ,SIGNAL-to-noise ratio - Abstract
This manuscript presents a new method of interpreting the ion temperature (T
i ) measurement with a retarding field analyzer (RFA) that accounts for the intermittent/turbulent nature of the scrape off layer (SOL) plasmas in tokamaks. Fast measurements and statistical methods are desirable for an adequate description of random fluctuations caused by such intermittent events as edge localized modes (ELMs) and blobs. We use a RFA that can sweep its current–voltage (I–V) characteristics with up to 10 kHz. The RFA uses an electronics compensation stage to subtract the capacitive pickup due to the finite connecting cable capacitance, which greatly improves the signal-to-noise ratio. In the 10 kHz case, a single I–V characteristic is obtained in time, which is an order of magnitude faster than the ELM cycle. The fast sweeping frequency allows us to reconstruct the Ti probability density function (PDF), which we use as the Ti representation. The boundary conditions that we place on the I–V characteristics when calculating the Ti values impact the resulting Ti PDF. If the boundaries are insensitive to the plasma fluctuations, then the most probable Ti value of the PDF (20 eV–25 eV) is similar to the Ti value obtained via the classical conditional averaging method (20 eV–27 eV). However, if the boundary conditions follow the fluctuations, then the PDF-based method gives a substantially higher most probable Ti value (35 eV–60 eV). Overall, we show that a fast sweeping RFA diagnostic should be used in intermittent SOL plasmas to reconstruct the PDF for accurate Ti measurements. [ABSTRACT FROM AUTHOR]- Published
- 2020
- Full Text
- View/download PDF
61. Overview of ASDEX Upgrade results
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Aguiam, D, Aho-Mantila, L, Angioni, C, Arden, N, Parra, R, Asunta, O, Debaar, M, Balden, M, Behler, K, Bergmann, A, Bernardo, J, Bernert, M, Beurskens, M, Biancalani, A, Bilato, R, Birkenmeier, G, Bobkov, V, Bock, A, Bogomolov, A, Bolzonella, T, Boeswirth, B, Bottereau, C, Bottino, A, Van den Brand, H, Brezinsek, S, Brida, D, Brochard, F, Bruhn, C, Buchanan, J, Buhler, A, Burckhart, A, Cambon-Silva, D, Camenen, Y, Carvalho, P, Carrasco, G, Cazzaniga, C, Carr, M, Carralero, D, Casali, L, Castaldo, C, Cavedon, M, Challis, C, Chankin, A, Chapman, I, Clairet, F, Classen, I, Coda, S, Coelho, R, Coenen, J, Colas, L, Conway, G, Costea, S, Coster, D, Croci, G, Cseh, G, Czarnecka, A, D'Arcangelo, O, Day, C, Delogu, R, de Marne, P, Denk, S, Denner, P, Dibon, M, D'Inca, R, Disiena, A, Douai, D, Drenik, A, Drube, R, Dunne, M, Duval, B, Dux, R, Eich, T, Elgeti, S, Engelhardt, K, Erdos, B, Erofeev, I, Esposito, B, Fable, E, Faitsch, M, Fantz, U, Faugel, H, Felici, F, Fietz, S, Figueredo, A, Fischer, R, Ford, O, Frassinetti, L, Freethy, S, Froeschle, M, Fuchert, G, Fuchs, J, Fuenfgelder, H, Galazka, K, Galdon-Quiroga, J, Gallo, A, Gao, Y, Garavaglia, S, Garcia-Munoz, M, Geiger, B, Cianfarani, C, Giannone, L, Giovannozzi, E, Gleason-Gonzalez, C, Gloeggler, S, Gobbin, M, Goerler, T, Goodman, T, Gorini, G, Gradic, D, Graeter, A, Granucci, G, Greuner, H, Griener, M, Groth, M, Gude, A, Guenter, S, Guimarais, L, Haas, G, Hakola, A, Ham, C, Happel, T, Harrison, J, Hatch, D, Hauer, V, Hayward, T, Heinemann, B, Heinzel, S, Hellsten, T, Henderson, S, Hennequin, P, Herrmann, A, Heyn, E, Hitzler, F, Hobirk, J, Hoelzl, M, Hoeschen, T, Holm, J, Hopf, C, Hoppe, F, Horvath, L, Houben, A, Huber, A, Igochine, V, Ilkei, T, Ivanova-Stanik, I, Jacob, W, Jacobsen, A, Jacquot, J, Janky, F, Jardin, A, Jaulmes, F, Jenko, F, Jensen, T, Joffrin, E, Kaesemann, C, Kallenbach, A, Kalvin, S, Kantor, M, Kappatou, A, Kardaun, O, Karhunen, J, Kasilov, S, Kernbichler, W, Kim, D, Kimmig, S, Kirk, A, Klingshirn, H, Koch, F, Kocsis, G, Koehn, A, Kraus, M, Krieger, K, Krivska, A, Kraemr-Flecken, A, Kurki-Suonio, T, Kurzan, B, Lackner, K, Laggner, F, Lang, P, Lauber, P, Lazanyi, N, Lazaros, A, Lebschy, A, Li, L, Li, M, Liang, Y, Lipschultz, B, Liu, Y, Lohs, A, Luhmann, N, Lunt, T, Lyssoivan, A, Madsen, J, Maier, H, Maj, O, Mailloux, J, Maljaars, E, Manas, P, Mancini, A, Manhard, A, Manso, M, Mantica, P, Mantsinen, M, Manz, P, Maraschek, M, Martens, C, Martin, P, Marrelli, L, Martitsch, A, Mastrostefano, S, Mayer, A, Mayer, M, Mazon, D, Mccarthy, P, Mcdermott, R, Meisl, G, Meister, H, Medvedeva, A, Merkel, P, Merkel, R, Merle, A, Mertens, V, Meshcheriakov, D, Meyer, H, Meyer, O, Miettunen, J, Milanesio, D, Mink, F, Mlynek, A, Monaco, F, Moon, C, Nazikian, R, Nemes-Czopf, A, Neu, G, Neu, R, Nielsen, A, Nielsen, S, Nikolaeva, V, Nocente, M, Noterdaeme, J, Nowak, S, Oberkofler, M, Oberparleiter, M, Ochoukov, R, Odstrcil, T, Olsen, J, Orain, F, Palermo, F, Papp, G, Paradela Perez, I, Pautasso, G, Enzel, F, Petersson, P, Pinzon, J, Piovesan, P, Piron, C, Plaum, B, Ploeckl, B, Plyusnin, V, Pokol, G, Poli, E, Porte, L, Potzel, S, Prisiazhniuk, D, Puetterich, T, Ramisch, M, Rapson, C, Rasmussen, J, Raupp, G, Refy, D, Reich, M, Reimold, F, Ribeiro, T, Riedl, R, Rittich, D, Rocchi, G, Rodriguez-Ramos, M, Rohde, V, Ross, A, Rott, M, Rubel, M, Ryan, D, Ryter, F, Saarelma, S, Salewski, M, Salmi, A, Sanchis-Sanchez, L, Santos, G, Santos, J, Sauter, O, Scarabosio, A, Schall, G, Schmid, K, Schmitz, O, Schneider, P, Schneller, M, Schrittwieser, R, Schubert, M, Schwarz-Selinger, T, Schweinzer, J, Scott, B, Sehmer, T, Sertoli, M, Shabbir, A, Shalpegin, A, Shao, L, Sharapov, S, Siccinio, M, Sieglin, B, Sigalov, A, Silva, A, Silva, C, Simon, P, Simpson, J, Snicker, A, Sommariva, C, Sozzi, C, Spolaore, M, Stejner, M, Stober, J, Stobbe, F, Stroth, U, Strumberger, E, Suarez, G, Sugiyama, K, Sun, H, Suttrop, W, Szepesi, T, Tal, B, Tala, T, Tardini, G, Tardocchi, M, Terranova, D, Tierens, W, Told, D, Tudisco, O, Trevisan, G, Treutterer, W, Trier, E, Tripsky, M, Valisa, M, Valovic, M, Vanovac, B, Varela, P, Varoutis, S, Verdoolaege, G, Vezinet, D, Vianello, N, Vicente, J, Vierle, T, Viezzer, E, von Toussaint, U, Wagner, D, Wang, N, Wang, X, Weidl, M, Weil, White, A, Willensdorfer, M, Wiringer, B, Wischmeier, M, Wolf, R, Wolfrum, E, Xiang, L, Yang, Q, Yang, Z, Yu, Q, Zagorski, R, Zammuto, I, Zarzoso, D, Zhang, W, van Zeeland, M, Zehetbauer, T, Zilker, M, Zoletnik, S, Zohm, H, Parra, RArredondo, deBaar, M, Coenen, JW, Coster, DP, DiSiena, A, Duval, BP, Fuchs, JC, Hakola, AH, Holm, JH, Jacobsen, AS, Klingshirn, H-J, Lang, PT, Luhmann, NC, Manso, M-E, McCarthy, PJ, McDermott, R, Nielsen, AH, Nielsen, SK, Noterdaeme, J-M, Schneider, PA, Sun, H-J, White, AE, Zohm, H., Aguiam, D, Aho-Mantila, L, Angioni, C, Arden, N, Parra, R, Asunta, O, Debaar, M, Balden, M, Behler, K, Bergmann, A, Bernardo, J, Bernert, M, Beurskens, M, Biancalani, A, Bilato, R, Birkenmeier, G, Bobkov, V, Bock, A, Bogomolov, A, Bolzonella, T, Boeswirth, B, Bottereau, C, Bottino, A, Van den Brand, H, Brezinsek, S, Brida, D, Brochard, F, Bruhn, C, Buchanan, J, Buhler, A, Burckhart, A, Cambon-Silva, D, Camenen, Y, Carvalho, P, Carrasco, G, Cazzaniga, C, Carr, M, Carralero, D, Casali, L, Castaldo, C, Cavedon, M, Challis, C, Chankin, A, Chapman, I, Clairet, F, Classen, I, Coda, S, Coelho, R, Coenen, J, Colas, L, Conway, G, Costea, S, Coster, D, Croci, G, Cseh, G, Czarnecka, A, D'Arcangelo, O, Day, C, Delogu, R, de Marne, P, Denk, S, Denner, P, Dibon, M, D'Inca, R, Disiena, A, Douai, D, Drenik, A, Drube, R, Dunne, M, Duval, B, Dux, R, Eich, T, Elgeti, S, Engelhardt, K, Erdos, B, Erofeev, I, Esposito, B, Fable, E, Faitsch, M, Fantz, U, Faugel, H, Felici, F, Fietz, S, Figueredo, A, Fischer, R, Ford, O, Frassinetti, L, Freethy, S, Froeschle, M, Fuchert, G, Fuchs, J, Fuenfgelder, H, Galazka, K, Galdon-Quiroga, J, Gallo, A, Gao, Y, Garavaglia, S, Garcia-Munoz, M, Geiger, B, Cianfarani, C, Giannone, L, Giovannozzi, E, Gleason-Gonzalez, C, Gloeggler, S, Gobbin, M, Goerler, T, Goodman, T, Gorini, G, Gradic, D, Graeter, A, Granucci, G, Greuner, H, Griener, M, Groth, M, Gude, A, Guenter, S, Guimarais, L, Haas, G, Hakola, A, Ham, C, Happel, T, Harrison, J, Hatch, D, Hauer, V, Hayward, T, Heinemann, B, Heinzel, S, Hellsten, T, Henderson, S, Hennequin, P, Herrmann, A, Heyn, E, Hitzler, F, Hobirk, J, Hoelzl, M, Hoeschen, T, Holm, J, Hopf, C, Hoppe, F, Horvath, L, Houben, A, Huber, A, Igochine, V, Ilkei, T, Ivanova-Stanik, I, Jacob, W, Jacobsen, A, Jacquot, J, Janky, F, Jardin, A, Jaulmes, F, Jenko, F, Jensen, T, Joffrin, E, Kaesemann, C, Kallenbach, A, Kalvin, S, Kantor, M, Kappatou, A, Kardaun, O, Karhunen, J, Kasilov, S, Kernbichler, W, Kim, D, Kimmig, S, Kirk, A, Klingshirn, H, Koch, F, Kocsis, G, Koehn, A, Kraus, M, Krieger, K, Krivska, A, Kraemr-Flecken, A, Kurki-Suonio, T, Kurzan, B, Lackner, K, Laggner, F, Lang, P, Lauber, P, Lazanyi, N, Lazaros, A, Lebschy, A, Li, L, Li, M, Liang, Y, Lipschultz, B, Liu, Y, Lohs, A, Luhmann, N, Lunt, T, Lyssoivan, A, Madsen, J, Maier, H, Maj, O, Mailloux, J, Maljaars, E, Manas, P, Mancini, A, Manhard, A, Manso, M, Mantica, P, Mantsinen, M, Manz, P, Maraschek, M, Martens, C, Martin, P, Marrelli, L, Martitsch, A, Mastrostefano, S, Mayer, A, Mayer, M, Mazon, D, Mccarthy, P, Mcdermott, R, Meisl, G, Meister, H, Medvedeva, A, Merkel, P, Merkel, R, Merle, A, Mertens, V, Meshcheriakov, D, Meyer, H, Meyer, O, Miettunen, J, Milanesio, D, Mink, F, Mlynek, A, Monaco, F, Moon, C, Nazikian, R, Nemes-Czopf, A, Neu, G, Neu, R, Nielsen, A, Nielsen, S, Nikolaeva, V, Nocente, M, Noterdaeme, J, Nowak, S, Oberkofler, M, Oberparleiter, M, Ochoukov, R, Odstrcil, T, Olsen, J, Orain, F, Palermo, F, Papp, G, Paradela Perez, I, Pautasso, G, Enzel, F, Petersson, P, Pinzon, J, Piovesan, P, Piron, C, Plaum, B, Ploeckl, B, Plyusnin, V, Pokol, G, Poli, E, Porte, L, Potzel, S, Prisiazhniuk, D, Puetterich, T, Ramisch, M, Rapson, C, Rasmussen, J, Raupp, G, Refy, D, Reich, M, Reimold, F, Ribeiro, T, Riedl, R, Rittich, D, Rocchi, G, Rodriguez-Ramos, M, Rohde, V, Ross, A, Rott, M, Rubel, M, Ryan, D, Ryter, F, Saarelma, S, Salewski, M, Salmi, A, Sanchis-Sanchez, L, Santos, G, Santos, J, Sauter, O, Scarabosio, A, Schall, G, Schmid, K, Schmitz, O, Schneider, P, Schneller, M, Schrittwieser, R, Schubert, M, Schwarz-Selinger, T, Schweinzer, J, Scott, B, Sehmer, T, Sertoli, M, Shabbir, A, Shalpegin, A, Shao, L, Sharapov, S, Siccinio, M, Sieglin, B, Sigalov, A, Silva, A, Silva, C, Simon, P, Simpson, J, Snicker, A, Sommariva, C, Sozzi, C, Spolaore, M, Stejner, M, Stober, J, Stobbe, F, Stroth, U, Strumberger, E, Suarez, G, Sugiyama, K, Sun, H, Suttrop, W, Szepesi, T, Tal, B, Tala, T, Tardini, G, Tardocchi, M, Terranova, D, Tierens, W, Told, D, Tudisco, O, Trevisan, G, Treutterer, W, Trier, E, Tripsky, M, Valisa, M, Valovic, M, Vanovac, B, Varela, P, Varoutis, S, Verdoolaege, G, Vezinet, D, Vianello, N, Vicente, J, Vierle, T, Viezzer, E, von Toussaint, U, Wagner, D, Wang, N, Wang, X, Weidl, M, Weil, White, A, Willensdorfer, M, Wiringer, B, Wischmeier, M, Wolf, R, Wolfrum, E, Xiang, L, Yang, Q, Yang, Z, Yu, Q, Zagorski, R, Zammuto, I, Zarzoso, D, Zhang, W, van Zeeland, M, Zehetbauer, T, Zilker, M, Zoletnik, S, Zohm, H, Parra, RArredondo, deBaar, M, Coenen, JW, Coster, DP, DiSiena, A, Duval, BP, Fuchs, JC, Hakola, AH, Holm, JH, Jacobsen, AS, Klingshirn, H-J, Lang, PT, Luhmann, NC, Manso, M-E, McCarthy, PJ, McDermott, R, Nielsen, AH, Nielsen, SK, Noterdaeme, J-M, Schneider, PA, Sun, H-J, White, AE, and Zohm, H.
- Abstract
The ASDEX Upgrade (AUG) programme is directed towards physics input to critical elements of the ITER design and the preparation of ITER operation, as well as addressing physics issues for a future DEMO design. Since 2015, AUG is equipped with a new pair of 3-strap ICRF antennas, which were designed for a reduction of tungsten release during ICRF operation. As predicted, a factor two reduction on the ICRF-induced W plasma content could be achieved by the reduction of the sheath voltage at the antenna limiters via the compensation of the image currents of the central and side straps in the antenna frame. There are two main operational scenario lines in AUG. Experiments with low collisionality, which comprise current drive, ELM mitigation/suppression and fast ion physics, are mainly done with freshly boronized walls to reduce the tungsten influx at these high edge temperature conditions. Full ELM suppression and non-inductive operation up to a plasma current of MA could be obtained at low plasma density. Plasma exhaust is studied under conditions of high neutral divertor pressure and separatrix electron density, where a fresh boronization is not required. Substantial progress could be achieved for the understanding of the confinement degradation by strong D puffing and the improvement with nitrogen or carbon seeding. Inward/outward shifts of the electron density profile relative to the temperature profile effect the edge stability via the pressure profile changes and lead to improved/decreased pedestal performance. Seeding and D gas puffing are found to effect the core fueling via changes in a region of high density on the high field side (HFSHD). The integration of all above mentioned operational scenarios will be feasible and naturally obtained in a large device where the edge is more opaque for neutrals and higher plasma temperatures provide a lower collisionality. The combination of exhaust control with pellet fueling has been successfully demonstrated. High divert
- Published
- 2017
62. Ion Cyclotron Range of Frequency Power Challenges and Solutions
- Author
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Noterdaeme, J. M, Bobkov, V, Fuenfgelder, H., D'Inca, R., Ochoukov, R., Jacquot, J., Tierens, W., Zhang, W., Faugel, H., Vierle, T., Zammuto, I., Crombé, I., Stepanov, I., Ragona, R., Messiaen, A., Van Eester, D., Tuccillo, A. A., Tudisco, O., Rocchi, G., Mancini, A., D’Arcangelo, O., Yang, Q., Wang, Y., Chen, Y., Milanesio, Daniele, Maggiora, Riccardo, Colas, L., Heuraux, S., Faudot, E., Moritz, J., Silva, A., Aguiam, D., ASDEX Upgrade1 Team, and EUROfusion MST1 Team
- Published
- 2016
63. IShTAR: An international facility for studying the interactions between ICRF waves and plasma
- Author
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Crombé, Kristel, D’Inca, R., Devaux, S., Faudot, E., Faugel, H., Fuenfgelder, H., Heuraux, S., Jacquot, J., Kostic, A., Louche, F., Moreno, J., Moritz, J., Nikiforov, Anton, Noterdaeme, Jean-Marie, Ochoukov, R., Usoltceva, Mariia, and Van Eester, D.
- Subjects
Physics and Astronomy - Published
- 2016
64. Progress in reducing ICRF-specific impurity release in ASDEX upgrade and JET
- Author
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Bobkov, V., primary, Aguiam, D., additional, Baruzzo, M., additional, Borodin, D., additional, Borodkina, I., additional, Brezinsek, S., additional, Coffey, I., additional, Colas, L., additional, Czarnecka, A., additional, Delabie, E., additional, Dumortier, P., additional, Durodie, F., additional, Dux, R., additional, Faugel, H., additional, Fünfgelder, H., additional, Giroud, C., additional, Goniche, M., additional, Hobirk, J., additional, Herrmann, A., additional, Jacquot, J., additional, Jacquet, Ph., additional, Kallenbach, A., additional, Krivska, A., additional, Klepper, C.C., additional, Lerche, E., additional, Menmuir, S., additional, Milanesio, D., additional, Maggiora, R., additional, Monakhov, I., additional, Nave, F., additional, Neu, R., additional, Noterdaeme, J.-M., additional, Ochoukov, R., additional, Pütterich, Th., additional, Reinke, M., additional, Tuccilo, A., additional, Tudisco, O., additional, Van Eester, D., additional, Wang, Y., additional, Yang, Q., additional, and Zhang, W., additional
- Published
- 2017
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65. Progress in controlling ICRF-edge interactions in ASDEX upgrade
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Bobkov, V. l., A, Jacquet, P. h., Ochoukov, R., Zhang, W., Bilato, R., Braun, F., Carralero, D., Colas, L., Czarnecka, A., Dux, R., Faugel, H., Fünfgelder, H., Jacquot, J., Křivská, A., Lunt, T., Milanesio, Daniele, Maggiora, Riccardo, Meyer, O., Monakhov, I., Noterdaeme, J. M., Potzel, S., Pütterich, T. h., Stepanov, I., and ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society
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PLASMA ,Chemistry ,HFSS ,Plasma ,01 natural sciences ,010305 fluids & plasmas ,Magnetic field ,Computational physics ,ANTENNAS ,ASDEX Upgrade ,0103 physical sciences ,Limiter ,Electric potential ,Atomic physics ,Antenna (radio) ,010306 general physics ,Voltage - Abstract
RF measurements during variation of the strap voltage balance of the original 2-strap ICRF antenna in ASDEX Upgrade at constant power are consistent with electromagnetic calculations by HFSS and TOPICA, more so for the latter. RF image current compensation is observed at the antenna limiters in the experiment at a local strap voltage of about half of the value of the remote strap, albeit with a non-negligible uncertainty in phasing. The RF-specific tungsten (W) source at the broad-limiter 2-strap antenna correlates strongly with the RF voltage at the local strap at the locations not connected to opposite side of the antenna along magnetic field lines. The trends of the observed increase of the RF loading with injection of local gas are well described by a combined EMC3-Eirene - FELICE calculations, with the most efficient improvement confirmed for the outer-midplane valves, but underestimated by about 1/3. The corresponding deuterium density tailoring is also likely responsible for the decrease of local W sources observed in the experiment.
- Published
- 2015
66. Maximization of ICRF power by SOL density tailoring with local gas injection
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Jacquet, P., primary, Goniche, M., additional, Bobkov, V., additional, Lerche, E., additional, Pinsker, R.I., additional, Pitts, R.A., additional, Zhang, W., additional, Colas, L., additional, Hosea, J., additional, Moriyama, S., additional, Wang, S.-J., additional, Wukitch, S., additional, Zhang, X., additional, Bilato, R., additional, Bufferand, H., additional, Guimarais, L., additional, Faugel, H., additional, Hanson, G.R., additional, Kocan, M., additional, Monakhov, I., additional, Noterdaeme, J.-M., additional, Petrzilka, V., additional, Shaw, A., additional, Stepanov, I., additional, Sips, A.C.C., additional, Van Eester, D., additional, and Wauters, T., additional
- Published
- 2016
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- View/download PDF
67. Improved measurements of ICRF antenna coupling at ASDEX Upgrade and comparison with the ICRF coupling code TOPICA
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Stepanov, I., Noterdaeme, J.-M., Faugel, H., Fünfgelder, H., Braun, F., Siegl, G., Bobkov, V., Milanesio, D., ASDEX Upgrade Team, and ASDEX Upgrade Team
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010302 applied physics ,Coupling ,Physics ,business.industry ,Mechanical Engineering ,01 natural sciences ,010305 fluids & plasmas ,Electric power transmission ,Optics ,Nuclear Energy and Engineering ,ASDEX Upgrade ,0103 physical sciences ,Line (geometry) ,Power dividers and directional couplers ,General Materials Science ,Standing wave ratio ,Antenna (radio) ,business ,Civil and Structural Engineering ,Voltage - Abstract
Three methods of measuring antenna impedance on the transmission lines of the ASDEX Upgrade ICRF system have been compared on a 50 Ω test line – by using directional couplers, voltage probe arrays and voltage/current probe pairs. Under the best available conditions (straight 50 Ω line), the voltage/current probe pair consistently shows the highest accuracy, up to 1.2%, independent of VSWR. The current and voltage probes have been calibrated by measuring their coupling values on the 50 Ω line; the values for a 25 Ω line were obtained from the 50 Ω measured values by computing the difference in coupling in the two lines for both probes using simple circuit models. The new measurement system is implemented on ASDEX Upgrade antennas and will complement the already available measurements from directional couplers. In addition to improving the accuracy, it will also have the advantage of yielding two complex reflection coefficients per antenna (one for each strap) instead of one. The measurement is located significantly closer to the antenna input (∼3 m from the strap input), thereby reducing errors due to the geometrical complexity of the transmission lines.
- Published
- 2013
68. Improved phase detection schemes for plasma interferometry
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Mlynek, A., Casali, L., Eixenberger, H., Faugel, H., Lang, P., Maraschek, M., Pautasso, G., Sellmair, G., and ASDEX Upgrade Team
- Published
- 2013
69. Designing the IShTAR antenna: Physics and engineering aspects
- Author
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Louche, F., primary, Jacquot, J., additional, Crombé, K., additional, Van Eester, D., additional, D’Inca, R., additional, Devaux, S., additional, Faudot, E., additional, Faugel, H., additional, Fünfgelder, H., additional, Heuraux, S., additional, Morgal, I., additional, Moritz, J., additional, Ochoukov, R., additional, and Noterdaeme, J.-M., additional
- Published
- 2015
- Full Text
- View/download PDF
70. First experimental results on the IShTAR testbed
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D’Inca, R., primary, Jacquot, J., additional, Ochoukov, R., additional, Morgal, I., additional, Crombe, K., additional, Louche, F., additional, Van Eester, D., additional, Heuraux, S., additional, Devaux, S., additional, Moritz, J., additional, Faudot, E., additional, Fünfgelder, H., additional, Faugel, H., additional, and Noterdaeme, J.-M., additional
- Published
- 2015
- Full Text
- View/download PDF
71. Studies of RF sheaths and diagnostics on IShTAR
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Crombé, K., primary, Devaux, S., additional, D’Inca, R., additional, Faudot, E., additional, Faugel, H., additional, Fünfgelder, H., additional, Heuraux, S., additional, Jacquot, J., additional, Louche, F., additional, Moritz, J., additional, Ochoukov, R., additional, Tripsky, M., additional, Van Eester, D., additional, Wauters, T., additional, and Noterdaeme, J.-M., additional
- Published
- 2015
- Full Text
- View/download PDF
72. First experimental results on the IShTAR testbed.
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D'Inca, R., Jacquot, J., Ochoukov, R., Morgal, I., Crombe, K., Louche, F., Van Eester, D., Heuraux, S., Devaux, S., Moritz, J., Faudot, E., Fünfgelder, H., Faugel, H., and Noterdaeme, J. -M.
- Subjects
PLASMA magnetism ,PLASMA interactions ,TOKAMAKS ,LANGMUIR probes ,PLASMA density - Abstract
IShTAR (Ion cyclotron Sheath Test ARrangement) is a linear magnetized plasma test facility dedicated to the investigation of RF wave/plasma interaction [1] in the Ion Cyclotron Range of Frequencies (ICRF). It provides a better accessibility for the instrumentation than tokamaks while being representative of the neighboring region of the wave emitter. It is equipped with a magnetized plasma source (1 m long, 0.4 m diameter) powered by a helical antenna up to 3 kW at 11 MHz. We present the results of the first analysis of the plasma characteristics (plasma density, electron temperature) in function of the operating parameters (injected power, neutral pressure and magnetic field) as measured with fixed and movable Langmuir probes, spectrometer and cameras. The plasma is presently produced only by the helical antenna (no ICRF). We show that the plasma exists in three regime depending on the power level: the first two ones are stable and separated by a jump in density; a first spatial profile of the plasma density has been established for these modes; The third mode is unstable, characterized by strong oscillations of the plasma tube position. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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- View/download PDF
73. ICRF wave field measurements in the presence of scrape off layer turbulence on the ASDEX Upgrade tokamak (invited).
- Author
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Ochoukov, R., Bobkov, V., Faugel, H., Fünfgelder, H., Jacquot, J., Noterdaeme, J.-M., and Suárez López, G.
- Subjects
CYCLOTRON resonance ,TURBULENCE ,PLASMA heating ,RADIO frequency ,TOKAMAKS ,ELECTRON temperature - Abstract
A new array of B-dot probes was installed on ASDEX Upgrade. The purpose of the new diagnostic is to study Ion Cyclotron Range-off Frequencies (ICRF) wave field distributions in the evanescent scrape-off layer (SOL) plasma region on the low field side of ASDEX Upgrade. The vacuum measurements (no gas, B
T = 0 T) reveal ICRF wave field measurements consistent with the profiles expected from the newly installed 3-strap ICRF antennas outside the antenna box: the shape of the toroidal distribution of both the amplitude and the phase is the same for the case of only the central straps being active, as for the case of only the side straps being active. These profiles become strongly modified during plasma operations. The modifications can be separated into two types: "Inter-edge localized mode (ELM)" and "During-ELM" periods. The phase distribution of the ICRF wave fields remains well-defined during the Inter-ELM period; however, it becomes more spread out over the entire 360° range during ELMs. The observed modulations cannot be explained by the observed changes in the ICRF power, as monitored in the transmission line. However, they are consistent with ICRF coupling changes introduced by plasma filaments: the plasma density perturbations due to the filaments are high enough to change the nature of the fast ICRF wave field from evanescent to propagating. The coverage of the present diagnostic is being expanded to include both the low field side and the high field side probes. Additionally, a manipulator probe head is being developed to measure ICRF wave field radial profiles across the SOL region. [ABSTRACT FROM AUTHOR]- Published
- 2016
- Full Text
- View/download PDF
74. Technical challenges in the construction of the steady-state stellarator Wendelstein 7-X
- Author
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Bosch, H.-S., primary, Wolf, R.C., additional, Andreeva, T., additional, Baldzuhn, J., additional, Birus, D., additional, Bluhm, T., additional, Bräuer, T., additional, Braune, H., additional, Bykov, V., additional, Cardella, A., additional, Durodié, F., additional, Endler, M., additional, Erckmann, V., additional, Gantenbein, G., additional, Hartmann, D., additional, Hathiramani, D., additional, Heimann, P., additional, Heinemann, B., additional, Hennig, C., additional, Hirsch, M., additional, Holtum, D., additional, Jagielski, J., additional, Jelonnek, J., additional, Kasparek, W., additional, Klinger, T., additional, König, R., additional, Kornejew, P., additional, Kroiss, H., additional, Krom, J.G., additional, Kühner, G., additional, Laqua, H., additional, Laqua, H.P., additional, Lechte, C., additional, Lewerentz, M., additional, Maier, J., additional, McNeely, P., additional, Messiaen, A., additional, Michel, G., additional, Ongena, J., additional, Peacock, A., additional, Pedersen, T.S., additional, Riedl, R., additional, Riemann, H., additional, Rong, P., additional, Rust, N., additional, Schacht, J., additional, Schauer, F., additional, Schroeder, R., additional, Schweer, B., additional, Spring, A., additional, Stäbler, A., additional, Thumm, M., additional, Turkin, Y., additional, Wegener, L., additional, Werner, A., additional, Zhang, D., additional, Zilker, M., additional, Akijama, T., additional, Alzbutas, R., additional, Ascasibar, E., additional, Balden, M., additional, Banduch, M., additional, Baylard, Ch., additional, Behr, W., additional, Beidler, C., additional, Benndorf, A., additional, Bergmann, T., additional, Biedermann, C., additional, Bieg, B., additional, Biel, W., additional, Borchardt, M., additional, Borowitz, G., additional, Borsuk, V., additional, Bozhenkov, S., additional, Brakel, R., additional, Brand, H., additional, Brown, T., additional, Brucker, B., additional, Burhenn, R., additional, Buscher, K.-P., additional, Caldwell-Nichols, C., additional, Cappa, A., additional, Carls, A., additional, Carvalho, P., additional, Ciupiński, Ł., additional, Cole, M., additional, Collienne, J., additional, Czarnecka, A., additional, Czymek, G., additional, Dammertz, G., additional, Dhard, C.P., additional, Davydenko, V.I., additional, Dinklage, A., additional, Drevlak, M., additional, Drotziger, S., additional, Dudek, A., additional, Dumortier, P., additional, Dundulis, G., additional, Eeten, P.v., additional, Egorov, K., additional, Estrada, T., additional, Faugel, H., additional, Fellinger, J., additional, Feng, Y., additional, Fernandes, H., additional, Fietz, W.H., additional, Figacz, W., additional, Fischer, F., additional, Fontdecaba, J., additional, Freund, A., additional, Funaba, T., additional, Fünfgelder, H., additional, Galkowski, A., additional, Gates, D., additional, Giannone, L., additional, García Regaña, J.M., additional, Geiger, J., additional, Geißler, S., additional, Greuner, H., additional, Grahl, M., additional, Groß, S., additional, Grosman, A., additional, Grote, H., additional, Grulke, O., additional, Haas, M., additional, Haiduk, L., additional, Hartfuß, H.-J., additional, Harris, J.H., additional, Haus, D., additional, Hein, B., additional, Heitzenroeder, P., additional, Helander, P., additional, Heller, R., additional, Hidalgo, C., additional, Hildebrandt, D., additional, Höhnle, H., additional, Holtz, A., additional, Holzhauer, E., additional, Holzthüm, R., additional, Huber, A., additional, Hunger, H., additional, Hurd, F., additional, Ihrke, M., additional, Illy, S., additional, Ivanov, A., additional, Jablonski, S., additional, Jaksic, N., additional, Jakubowski, M., additional, Jaspers, R., additional, Jensen, H., additional, Jenzsch, H., additional, Kacmarczyk, J., additional, Kaliatk, T., additional, Kallmeyer, J., additional, Kamionka, U., additional, Karaleviciu, R., additional, Kern, S., additional, Keunecke, M., additional, Kleiber, R., additional, Knauer, J., additional, Koch, R., additional, Kocsis, G., additional, Könies, A., additional, Köppen, M., additional, Koslowski, R., additional, Koshurinov, J., additional, Krämer-Flecken, A., additional, Krampitz, R., additional, Kravtsov, Y., additional, Krychowiak, M., additional, Krzesinski, G., additional, Ksiazek, I., additional, Kubkowska, M., additional, Kus, A., additional, Langish, S., additional, Laube, R., additional, Laux, M., additional, Lazerson, S., additional, Lennartz, M., additional, Li, C., additional, Lietzow, R., additional, Lohs, A., additional, Lorenz, A., additional, Louche, F., additional, Lubyako, L., additional, Lumsdaine, A., additional, Lyssoivan, A., additional, Maaßberg, H., additional, Marek, P., additional, Martens, C., additional, Marushchenko, N., additional, Mayer, M., additional, Mendelevitch, B., additional, Mertens, Ph., additional, Mikkelsen, D., additional, Mishchenko, A., additional, Missal, B., additional, Mizuuchi, T., additional, Modrow, H., additional, Mönnich, T., additional, Morizaki, T., additional, Murakami, S., additional, Musielok, F., additional, Nagel, M., additional, Naujoks, D., additional, Neilson, H., additional, Neubauer, O., additional, Neuner, U., additional, Nocentini, R., additional, Noterdaeme, J.-M., additional, Nührenberg, C., additional, Obermayer, S., additional, Offermanns, G., additional, Oosterbeek, H., additional, Otte, M., additional, Panin, A., additional, Pap, M., additional, Paquay, S., additional, Pasch, E., additional, Peng, X., additional, Petrov, S., additional, Pilopp, D., additional, Pirsch, H., additional, Plaum, B., additional, Pompon, F., additional, Povilaitis, M., additional, Preinhaelter, J., additional, Prinz, O., additional, Purps, F., additional, Rajna, T., additional, Récsei, S., additional, Reiman, A., additional, Reiter, D., additional, Remmel, J., additional, Renard, S., additional, Rhode, V., additional, Riemann, J., additional, Rimkevicius, S., additional, Riße, K., additional, Rodatos, A., additional, Rodin, I., additional, Romé, M., additional, Roscher, H.-J., additional, Rummel, K., additional, Rummel, Th., additional, Runov, A., additional, Ryc, L., additional, Sachtleben, J., additional, Samartsev, A., additional, Sanchez, M., additional, Sano, F., additional, Scarabosio, A., additional, Schmid, M., additional, Schmitz, H., additional, Schmitz, O., additional, Schneider, M., additional, Schneider, W., additional, Scheibl, L., additional, Scholz, M., additional, Schröder, G., additional, Schröder, M., additional, Schruff, J., additional, Schumacher, H., additional, Shikhovtsev, I.V., additional, Shoji, M., additional, Siegl, G., additional, Skodzik, J., additional, Smirnow, M., additional, Speth, E., additional, Spong, D.A., additional, Stadler, R., additional, Sulek, Z., additional, Szabó, V., additional, Szabolics, T., additional, Szetefi, T., additional, Szökefalvi-Nagy, Z., additional, Tereshchenko, A., additional, Thomsen, H., additional, Timmermann, D., additional, Tittes, H., additional, Toi, K., additional, Tournianski, M., additional, Toussaint, U.v., additional, Tretter, J., additional, Tulipán, S., additional, Turba, P., additional, Uhlemann, R., additional, Urban, J., additional, Urbonavicius, E., additional, Urlings, P., additional, Valet, S., additional, Van Eester, D., additional, Van Schoor, M., additional, Vervier, M., additional, Viebke, H., additional, Vilbrandt, R., additional, Vrancken, M., additional, Wauters, T., additional, Weissgerber, M., additional, Weiß, E., additional, Weller, A., additional, Wendorf, J., additional, Wenzel, U., additional, Windisch, T., additional, Winkler, E., additional, Winkler, M., additional, Wolowski, J., additional, Wolters, J., additional, Wrochna, G., additional, Xanthopoulos, P., additional, Yamada, H., additional, Yokoyama, M., additional, Zacharias, D., additional, Zajac, J., additional, Zangl, G., additional, Zarnstorff, M., additional, Zeplien, H., additional, Zoletnik, S., additional, and Zuin, M., additional
- Published
- 2013
- Full Text
- View/download PDF
75. 3He in H, Ion Cyclotron Resonance Frequency Mode Conversion and Minority Heating Experiments in ASDEX Upgrade
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Noterdaeme, J., Brambilla, M., Brüsehaber, B., Dux, R., Fahrbach, H., Becker, W., Braun, F., Faugel, H., Hartmann, d., D., Hofmeister, F., Wesner, F., and ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society
- Published
- 1999
76. A new B-dot probe-based diagnostic for amplitude, polarization, and wavenumber measurements of ion cyclotron range-of frequency fields on ASDEX Upgrade.
- Author
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Ochoukov, R., Bobkov, V., Faugel, H., Fünfgelder, H., and Noterdaeme, J.-M.
- Subjects
TOKAMAKS ,CYCLOTRON resonance ,PLASMA gases ,WAVENUMBER ,RADIO frequency ,ELECTROMAGNETISM - Abstract
A new B-dot probe-based diagnostic has been installed on an ASDEX Upgrade tokamak to characterize ion cyclotron range-of frequency (ICRF) wave generation and interaction with magnetized plasma. The diagnostic consists of a field-aligned array of B-dot probes, oriented to measure fast and slow ICRF wave fields and their field-aligned wavenumber (k
// ) spectrum on the low field side of ASDEX Upgrade. A thorough description of the diagnostic and the supporting electronics is provided. In order to compare the measured dominant wavenumber of the local ICRF fields with the expected spectrum of the launched ICRF waves, in-air near-field measurements were performed on the newly installed 3-strap ICRF antenna to reconstruct the dominant launched toroidal wavenumbers (ktor ). Measurements during a strap current phasing scan in tokamak discharges reveal an upshift in k// as strap phasing is moved away from the dipole configuration. This result is the opposite of the ktor trend expected from in-air near-field measurements; however, the near-field based reconstruction routine does not account for the effect of induced radiofrequency (RF) currents in the passive antenna structures. The measured exponential increase in the local ICRF wave field amplitude is in agreement with the upshifted k// , as strap phasing moves away from the dipole configuration. An examination of discharges heated with two ICRF antennas simultaneously reveals the existence of beat waves at 1 kHz, as expected from the difference of the two antennas' operating frequencies. Beats are observed on both the fast and the slow wave probes suggesting that the two waves are coupled outside the active antennas. Although the new diagnostic shows consistent trends between the amplitude and the phase measurements in response to changes applied by the ICRF antennas, the disagreement with the in-air near-field measurements remains. An electromagnetic model is currently under development to address this issue. [ABSTRACT FROM AUTHOR]- Published
- 2015
- Full Text
- View/download PDF
77. ICRF operation with improved antennas in ASDEX Upgrade with W wall
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Bobkov, V., Balden, M., Bilato, R., Braun, F., Dux, R., Herrmann, A., Faugel, H., Fünfgelder, H., Giannone, L., Kallenbach, A., Maier, H., Müller, H. W., Neu, R., Noterdaeme, J.-M., Pütterich, T., Rohde, V., Tsujii, N., Zeus, F., Zohm, H., ASDEX Upgrade Team, and ASDEX Upgrade Team
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Nuclear and High Energy Physics ,Materials science ,business.industry ,Cyclotron ,Phase (waves) ,Plasma ,Condensed Matter Physics ,law.invention ,Optics ,ASDEX Upgrade ,Power Balance ,law ,Sputtering ,Limiter ,Antenna (radio) ,business - Abstract
Experiments with boron-coated side limiters of two antennas operated together in 2012 showed that the side limiters are responsible for more than half of the increased W content in the plasma. Together with the contribution from the other limiter tiles, not replaced in 2012, the limiters account for at least two thirds of the W content. A modified test two-strap ion cyclotron range of frequency (ICRF) antennas in ASDEX Upgrade with broad limiters and narrow straps has shown an improved operation with full W wall in 2011/2012 campaigns with up to a 40% lower rise of W concentration allowing more stable operation at low deuterium gas injection rate. Limiter spectroscopy measurements indicate up to a 40% reduction of the rise of the W sputtering yield during ICRF power, measured under the assumption of negligible influence of geometry variations and reflections on the measurements. The boron limiters on two antennas together with the improved broad-limiter antenna allowed a successful ICRF operation in 2012. As a part of long-term strategy of antenna design development, two three-strap antennas with phase and power balance control for reduction of E|| are planned for installation in the future.
- Published
- 2013
78. Upgrading the ICRF data acquisition system at ASDEX Upgrade.
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Faugel, H., Bobkov, V., Eixenberger, H., Podoba, Y., and Stepanov, I.
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- *
ENGINEERING instruments , *DETECTORS , *PLASMA engineering , *PLASMA devices , *PLASMA physics - Abstract
The ICRF system at ASDEX Upgrade has proved to be very flexible in use, from high power heating down to moderate or low power levels needed for vessel conditioning. As a consequence of these wide varieties of applications the present capabilities of the data acquisition system became a limiting factor, as the CAMAC system could only record up to about 500 ksamples per channel with 12 bit resolution. The upgrade to the SIO (serial I/O data acquisition) system allows a constant sampling time of 5 µs during the whole plasma discharge with an increased resolution of 16 bit. The SIO system was already used in the last campaign of ASDEX Upgrade with 96 channels and will be further expanded. At low power ICRF experiments the output voltage of the linear rf-detectors was rather low, which led to large measurement errors. As a consequence of this the linear detectors were replaced by logarithmic detectors, expanding the dynamic range from 30 db to 60 dB. Each of the new rf-detectors has two rf inputs and allows to measure the phase difference between the inputs. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
79. Influence ofGas Injection Location and Magnetic Perturbations on ICRF Antenna Performance in ASDEX Upgrade.
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Bobkov, V., Stepanova, I., Jacquet, P., Monakhov, I., Bilato, R., Colas, L., Czarnecka, A., Dux, R., Faugel, H., Kallenbach, A., Müller, H. W., Noterdaeme, J.-M., Potzel, S., Pütterich, Th., and Suttrop, W.
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PHYSICS research ,QUANTUM perturbations ,GAS injection ,CYCLOTRON resonance ,ION sources ,PLASMA flow ,FLUID flow ,SPUTTERING (Physics) - Abstract
In ASDEX Upgrade H-modes with H
98 0.95, similar effect of the ICRF antenna loading improvement by local gas injection was observed as previously in L-modes. The antenna loading resistance Ra between and during ELMs can increase by more than 25% after a switch-over from a deuterium rate of 7.5-1021 D/s injected from a toroidally remote location to the same amount of deuterium injected close to an antenna. However, in contrast to L-mode, this effect is small in H-mode when the valve downstream w.r.t. parallel plasma flows is used. In L-mode, a non-linearity of Ra at PJCRF <30 kW is observed when using the gas valve integrated in antenna. Application of magnetic perturbations (MPs) in H-mode discharges leads to an increase of Ra >30% with no effect of spectrum and phase of MPs on Ra found so far. In the case ELMs are fully mitigated, the antenna loading is higher and steadier. In the case ELMs are not fully mitigated, the value of Ra between ELMs is increased. Looking at the W source modification for the improved loading, the local gas injection is accompanied by decreased values of tungsten (W) influx Τw from the limiters and its effective sputtering yield Yw , with the exception of the locations directly at the antenna gas valve. Application of MPs leads to increase of Τw and Yw for some of the MP phases. With nitrogen seeding in the divertor, ICRF is routinely used to avoid impurity accumulation and that despite enhanced Τw and Yw at the antenna limiters. [ABSTRACT FROM AUTHOR]- Published
- 2014
- Full Text
- View/download PDF
80. Improved Measurements of ICRF Antenna Input Impedance at ASDEX Upgrade during ICRF Coupling Studies.
- Author
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Stepanov, I., Noterdaeme, J.-M., Bobkov, V., Coster, D., Faugel, H., Bilato, R., Brambilla, M., Suttrop, W., Kallenbach, A., Schweinzer, J., Wolfrum, E., Fischer, R., Mlynek, A., Nikolaeva, V., Guimarais, L., and Milanesio, D.
- Subjects
PHYSICS research ,CYCLOTRON resonance ,ION sources ,TOKAMAKS ,PINCH effect (Physics) ,PLASMA confinement devices ,FUSION reactors ,QUANTUM perturbations - Abstract
A new set of diagnostics has been implemented on ASDEX Upgrade to measure the input impedance of the ICRF antennas, in the form of a voltage and current probe pair installed on each feeding line of every antenna. Besides allowing the measurement of the reflection coefficient Τ of each antenna port, the probes have two advantages: first, they are located close to the antenna ports (~3 m) and thus the measurements are not affected by the uncertainties due to the transmission and matching network; second, they are independent of matching conditions. These diagnostics have been used to study the behavior of the ASDEX Upgrade antennas while changing the plasma shape (low to high triangularity) and applying magnetic perturbations (MPs) via saddle coils. Scans in the separatrix position R
sep were also performed. Upper triangularity δ0 was increased from 0.1 to 0.3 (with the lower triangularity δu kept roughly constant at 0.45) and significant decreases in |Τ| (up to ~30%, markedly improving antenna coupling) and moderate changes in phase (up to ~5°) of Τ on each feeding line were observed approximately at δ0 ≥ 0.29. During MPs (in ~0.5 s pulses with a coil current of 1 kA), a smaller response was observed: 6% - 7% in |Τ|, with changes in phase of ~5° apparently due to Rsep scans only. As |Τ| is usually in the range 0.8 - 0.9, this still leads to a significant increase in possible coupled power. Numerical simulations of the antenna behavior were carried out using the FELICE code; the simulation results are in qualitative agreement with experimental measurements. The results presented here complement the studies on the influence of gas injection and MPs on the ICRF antenna performance presented in [4]. [ABSTRACT FROM AUTHOR]- Published
- 2014
- Full Text
- View/download PDF
81. Improvement of the phase regulation between two amplifiers feeding the inputs of the 3dB combiner in the ASDEX-Upgrade ICRH system
- Author
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Grine, D., primary, Pompon, F., additional, Faugel, H., additional, Funfgelder, H., additional, Noterdaeme, J. M., additional, Koch, R., additional, Phillips, Cynthia K., additional, and Wilson, James R., additional
- Published
- 2011
- Full Text
- View/download PDF
82. Characterization of arcs in frequency domain
- Author
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D’Incà, R., primary, El Khaldi, M., additional, Siegl, G., additional, Faugel, H., additional, Braun, F., additional, Eckert, B., additional, Bobkov, V., additional, Noterdaeme, J.-M., additional, Bobkov, Volodymyr, additional, and Noterdaeme, Jean-Marie, additional
- Published
- 2009
- Full Text
- View/download PDF
83. Measuring Impedance and Power in ICRF Antenna Feeding Lines with Voltage and Current Probes.
- Author
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Faugel, H., Bobkov, V., Fünfgelder, H., Siegl, G., and Stepanov, I.
- Subjects
- *
ELECTRIC impedance , *ELECTRIC power , *ION cyclotron resonance spectrometry , *CALIBRATION , *ELECTRIC lines , *PHYSICS experiments , *ANTENNAS (Electronics) - Abstract
Usually the power measurement in a ICRF system is done using directional couplers. Directional couplers can be calibrated with moderate effort in 50 Ohm transmission lines, as the measurement equipment with this impedance is widely available. In transmission lines with a lower impedance like 30 or 25 Ohm, who are common in antenna feeding lines, makes calibration complicated as reflection on impedance transitions like connectors for the measurement equipments are unavoidable. In such transmission lines the use of voltage and current probes can be beneficial as their calibration procedure is easier. A way to calibrate these probes in a low-impedance transmission line is shown. The last part of this paper shows the first results of this kind of measurements at an ASDEX Upgrade antenna feeding line. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
84. Improvement of the phase regulation between two amplifiers feeding the inputs of the 3dB combiner in the ASDEX-Upgrade ICRH system.
- Author
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Grine, D., Pompon, F., Faugel, H., Funfgelder, H., Noterdaeme, J. M., and Koch, R.
- Subjects
ELECTRONIC amplifiers ,PHYSICS experiments ,ION cyclotron resonance spectrometry ,ELECTRIC heating ,PLASMA generators ,RADIO frequency - Abstract
The present ICRF system at ASDEX Upgrade uses 3dB combiners to forward the combined power of a generator pair to a single line [1]. Optimal output performance is achieved when the voltages at the two input lines of a combiner are equal in amplitude and in phase quadrature. If this requirement is not met, a large amount of power is lost in the dummy loads of the combiner. To minimize losses, it is paramount to reach this phase relationship in a fast and stable way. The current phase regulation system is based on analog phase locked loops circuits. The main limitation of this system is the response time: several tens of milliseconds are needed to achieve a stable state. In order to get rid of the response time limitation of the current system, a new system is proposed based on a multi-channel direct digital synthesis device which is steered by a microcontroller and a software-based controller. The proposed system has been developed and successfully tested on a test-bench. The results show a remarkable improvement in the reduction of the response times. Other significant advantages provided by the new system include greater flexibility for frequency and phase settings, lower cost and a noticeable size reduction of the system. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
85. Lifetime Prolongation of ICRF Generators, Theoretical and Conceptual Aspects.
- Author
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Pompon, F., Fuenfgelder, H., and Faugel, H.
- Subjects
ION cyclotron resonance spectrometry ,PLASMA generators ,PHYSICS experiments ,ELECTRONIC amplifiers ,ENERGY dissipation ,NUCLEAR physics - Abstract
Two ICRF generators, previously used for ASDEX and W7-AS, have been designed almost 30 years ago [1], based on technology and components available at that time. Four, more recent generators used by ASDEX Upgrade, are an evolutionary development. Today, two out of three tetrodes used in the amplifier line up are obsolete and spares are becoming scarce. Based on the long experience gained with the initial configuration, a redesign process has been started aiming to significantly prolong lifetime of the generators. Each of the four amplification stages required to reach 2 MW output power is undergoing a more or less severe modification. The most critical change concerns the final amplification stage and has already been successfully implemented [2], whereas changes of the remaining stages are on-going. A new, FET based first stage, provides a higher output power in order to drive the following (pre-driver) stage where a triode is replacing the initial tetrode. The tube of the third (driver) stage is upgraded to a higher power dissipation capability, to increase the drive power for the fourth (final) stage. One of the two generators formerly used for ASDEX and W7-AS has been modified along those lines. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
86. Lifetime Prolongation of ICRF Generators, Practical Aspects and Results.
- Author
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Fuenfgelder, H., Pompon, F., Faugel, H., Singh, R., Bhardwaj, A., Kushwah, M. K., and Mukherjee, A.
- Subjects
ION cyclotron resonance spectrometry ,PLASMA generators ,FUSION reactors ,NUCLEAR activation analysis ,MANUFACTURING processes ,NUCLEAR engineering - Abstract
To overcome final tube obsolescence of 2MW generators in service for AUG and to gain hands on experience with a potentially ITER relevant tetrode from CPI, a 1.5 MW generator, previously used for ASDEX and W7-AS and described in [4], was converted using a 4CM2500KG based plug & play replacement for the CQK650-2 tetrode. A similar conversion, substituting a different tetrode was reported in [3] and served as a guideline. IPP Garching reactivated the generator that had been out of service for many years and prepared and tested the required infrastructure. A mechanical adaptation kit designed by ITER India was manufactured by IPP Garching. Fitting the generator with the tube replacement and testing it was a joint activity at IPP Garching. With a careful tune up the generator achieved 1.5 MW RF output power. Further infrastructural improvements to reach 2MW are on the way. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
87. Overview of ASDEX Upgrade results
- Author
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Zohm, H, primary, Angioni, C, additional, Arslanbekov, R, additional, Atanasiu, C, additional, Becker, G, additional, Becker, W, additional, Behler, K, additional, Behringer, K, additional, Bergmann, A, additional, Bilato, R, additional, Bobkov, V, additional, Bolshukhin, D, additional, Bolzonella, T, additional, Borrass, K, additional, Brambilla, M, additional, Braun, F, additional, Buhler, A, additional, Carlson, A, additional, Conway, G.D, additional, Coster, D.P, additional, Drube, R, additional, Dux, R, additional, Egorov, S, additional, Eich, T, additional, Engelhardt, K, additional, Fahrbach, H.-U, additional, Fantz, U, additional, Faugel, H, additional, Finken, K.H, additional, Foley, M, additional, Franzen, P, additional, Fuchs, J.C, additional, Gafert, J, additional, Fournier, K.B, additional, Gantenbein, G, additional, Gehre, O, additional, Geier, A, additional, Gernhardt, J, additional, Goodman, T, additional, Gruber, O, additional, Gude, A, additional, Günter, S, additional, Haas, G, additional, Hartmann, D, additional, Heger, B, additional, Heinemann, B, additional, Herrmann, A, additional, Hobirk, J, additional, Hofmeister, F, additional, Hohenöcker, H, additional, Horton, L.D, additional, Igochine, V, additional, Jacchia, A, additional, Jakobi, M, additional, Jenko, F, additional, Kallenbach, A, additional, Kardaun, O, additional, Kaufmann, M, additional, Keller, A, additional, Kendl, A, additional, Kim, J.-W, additional, Kirov, K, additional, Kochergov, R, additional, Kollotzek, H, additional, Kraus, W, additional, Krieger, K, additional, Kurki-Suonio, T, additional, Kurzan, B, additional, Lang, P.T, additional, Lasnier, C, additional, Lauber, P, additional, Laux, M, additional, Leonard, A.W, additional, Leuterer, F, additional, Lohs, A, additional, Lorenz, A, additional, Lorenzini, R, additional, Maggi, C, additional, Maier, H, additional, Mank, K, additional, Manso, M.-E, additional, Mantica, P, additional, Maraschek, M, additional, Martines, E, additional, Mast, K.-F, additional, McCarthy, P, additional, Meisel, D, additional, Meister, H, additional, Meo, F, additional, Merkel, P, additional, Merkel, R, additional, Merkl, D, additional, Mertens, V, additional, Monaco, F, additional, Mück, A, additional, Müller, H.W, additional, Münich, M, additional, Murmann, H, additional, Na, Y.-S, additional, Neu, G, additional, Neu, R, additional, Neuhauser, J, additional, Nguyen, F, additional, Nishijima, D, additional, Nishimura, Y, additional, Noterdaeme, J.-M, additional, Nunes, I, additional, Pautasso, G, additional, Peeters, A.G, additional, Pereverzev, G, additional, Pinches, S.D, additional, Poli, E, additional, Proschek, M, additional, Pugno, R, additional, Quigley, E, additional, Raupp, G, additional, Reich, M, additional, Ribeiro, T, additional, Riedl, R, additional, Rohde, V, additional, Roth, J, additional, Ryter, F, additional, Saarelma, S, additional, Sandmann, W, additional, Savtchkov, A, additional, Sauter, O, additional, Schade, S, additional, Schilling, H.-B, additional, Schneider, W, additional, Schramm, G, additional, Schwarz, E, additional, Schweinzer, J, additional, Schweizer, S, additional, Scott, B.D, additional, Seidel, U, additional, Serra, F, additional, Sesnic, S, additional, Sihler, C, additional, Silva, A, additional, Sips, A.C.C, additional, Speth, E, additional, Stäbler, A, additional, Steuer, K.-H, additional, Stober, J, additional, Streibl, B, additional, Strumberger, E, additional, Suttrop, W, additional, Tabasso, A, additional, Tanga, A, additional, Tardini, G, additional, Tichmann, C, additional, Treutterer, W, additional, Troppmann, M, additional, Urano, H, additional, Varela, P, additional, Vollmer, O, additional, Wagner, D, additional, Wenzel, U, additional, Wesner, F, additional, Westerhof, E, additional, Wolf, R, additional, Wolfrum, E, additional, Würsching, E, additional, Yoon, S.-W, additional, Yu, Q, additional, Zasche, D, additional, Zehetbauer, T, additional, and Zehrfeld, H.-P, additional
- Published
- 2003
- Full Text
- View/download PDF
88. Characterization of arcs in frequency domain.
- Author
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D'Incà, R., El Khaldi, M., Siegl, G., Faugel, H., Braun, F., Eckert, B., Bobkov, V., and Noterdaeme, J.-M.
- Subjects
FREQUENCY spectra ,ELECTRIC arc ,ELECTRIC discharges ,SPECTRUM analysis ,GLOW discharges - Abstract
Arc detection systems are developed for ICRH on ITER to prevent arcs from damaging the RF components. One of the detectors, the Sub-Harmonic Arc Detector (SHAD) is based on the detection of the frequencies emitted in the MHz range by arcs [R1]. To ensure the high level of reliability required for this safety system, it is necessary to demonstrate that these frequencies present a signal with a Signal to Noise Ratio high enough to be detected under the wide range of operational conditions (frequency, power, configuration) and for the different types of arcs that can appear in the feeding lines and on the antennas (vacuum arc, glow discharge, multipactor-induced discharge). For each type of arc, we analyze the evolution of the frequency spectrum relative to the evolution of other electrical parameters (reflected power, voltage). [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
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89. Steady state advanced scenarios at ASDEX Upgrade
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Sips, A C C, primary, Arslanbekov, R, additional, Atanasiu, C, additional, Becker, W, additional, Becker, G, additional, Behler, K, additional, Behringer, K, additional, Bergmann, A, additional, Bilato, R, additional, Bolshukhin, D, additional, Borrass, K, additional, Braams, B, additional, Brambilla, M, additional, Braun, F, additional, Buhler, A, additional, Conway, G, additional, Coster, D, additional, Drube, R, additional, Dux, R, additional, Egorov, S, additional, Eich, T, additional, Engelhardt, K, additional, Fahrbach, H-U, additional, Fantz, U, additional, Faugel, H, additional, Foley, M, additional, Fournier, K B, additional, Franzen, P, additional, Fuchs, J C, additional, Gafert, J, additional, Gantenbein, G, additional, Gehre, O, additional, Geier, A, additional, Gernhardt, J, additional, Gruber, O, additional, Gude, A, additional, G nter, S, additional, Haas, G, additional, Hartmann, D, additional, Heger, B, additional, Heinemann, B, additional, Herrmann, A, additional, Hobirk, J, additional, Hofmeister, F, additional, Hohen cker, H, additional, Horton, L, additional, Igochine, V, additional, Jacobi, D, additional, Jakobi, M, additional, Jenko, F, additional, Kallenbach, A, additional, Kardaun, O, additional, Kaufmann, M, additional, Keller, A, additional, Kendl, A, additional, Kim, J-W, additional, Kirov, K, additional, Kochergov, R, additional, Kollotzek, H, additional, Kraus, W, additional, Krieger, K, additional, Kurzan, B, additional, Lang, P T, additional, Lauber, P, additional, Laux, M, additional, Leuterer, F, additional, Lohs, A, additional, Lorenz, A, additional, Maggi, C, additional, Maier, H, additional, Mank, K, additional, Manso, M-E, additional, Maraschek, M, additional, Mast, K F, additional, McCarthy, P, additional, Meisel, D, additional, Meister, H, additional, Meo, F, additional, Merkel, R, additional, Merkl, D, additional, Mertens, V, additional, Monaco, F, additional, M ck, A, additional, M ller, H W, additional, M nich, M, additional, Murmann, H, additional, Na, Y-S, additional, Neu, G, additional, Neu, R, additional, Neuhauser, J, additional, Noterdaeme, J-M, additional, Nunes, I, additional, Pautasso, G, additional, Peeters, A G, additional, Pereverzev, G, additional, Pinches, S, additional, Poli, E, additional, Proschek, M, additional, Pugno, R, additional, Quigley, E, additional, Raupp, G, additional, Ribeiro, T, additional, Riedl, R, additional, Riondato, S, additional, Rohde, V, additional, Roth, J, additional, Ryter, F, additional, Saarelma, S, additional, Sandmann, W, additional, Schade, S, additional, Schilling, H-B, additional, Schneider, W, additional, Schramm, G, additional, Schweizer, S, additional, Scott, B, additional, Seidel, U, additional, Serra, F, additional, Sesnic, S, additional, Sihler, C, additional, Silva, A, additional, Speth, E, additional, St bler, A, additional, Steuer, K-H, additional, Stober, J, additional, Streibl, B, additional, Strumberger, E, additional, Suttrop, W, additional, Tabasso, A, additional, Tanga, A, additional, Tardini, G, additional, Tichmann, C, additional, Treutterer, W, additional, Troppmann, M, additional, Varela, P, additional, Vollmer, O, additional, Wagner, D, additional, Wenzel, U, additional, Wesner, F, additional, Wolf, R, additional, Wolfrum, E, additional, W rsching, E, additional, Yu, Q, additional, Zasche, D, additional, Zehetbauer, T, additional, Zehrfeld, H-P, additional, and Zohm, H, additional
- Published
- 2002
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90. Overview of ASDEX Upgrade results
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Gruber, O., primary, Arslanbekov, R., additional, Atanasiu, C., additional, Bard, A., additional, Becker, G., additional, Becker, W., additional, Beckmann, M., additional, Behler, K., additional, Behringer, K., additional, Bergmann, A., additional, Bilato, R., additional, Bolshukin, D., additional, Borrass, K., additional, Bosch, H.-S., additional, Braams, B., additional, Brambilla, M., additional, Brandenburg, R., additional, Braun, F., additional, Brinkschulte, H., additional, Brückner, R., additional, Brüsehaber, B., additional, Büchl, K., additional, Buhler, A., additional, Bürbaumer, H., additional, Carlson, A., additional, Ciric, M., additional, Conway, G., additional, Coster, D.P., additional, Dorn, C., additional, Drube, R., additional, Dux, R., additional, Egorov, S., additional, Engelhardt, W., additional, Fahrbach, H.-U., additional, Fantz, U., additional, Faugel, H., additional, Foley, M., additional, Franzen, P., additional, Fu, P., additional, Fuchs, J.C., additional, Gafert, J., additional, Gantenbein, G., additional, Gehre, O., additional, Geier, A., additional, Gernhardt, J., additional, Gubanka, E., additional, Gude, A., additional, Günter, S., additional, Haas, G., additional, Hartmann, D., additional, Heinemann, B., additional, Herrmann, A., additional, Hobirk, J., additional, Hofmeister, F., additional, Hohenöcker, H., additional, Horton, L., additional, Hu, L., additional, Jacobi, D., additional, Jakobi, M., additional, Jenko, F., additional, Kallenbach, A., additional, Kardaun, O., additional, Kaufmann, M., additional, Kendl, A., additional, Kim, J.-W., additional, Kirov, K., additional, Kochergov, R., additional, Kollotzek, H., additional, Kraus, W., additional, Krieger, K., additional, Kurzan, B., additional, Kyriakakis, G., additional, Lackner, K., additional, Lang, P.T., additional, Lang, R.S., additional, Laux, M., additional, Lengyel, L., additional, Leuterer, F., additional, Lorenz, A., additional, Maier, H., additional, Mank, K., additional, Manso, M.-E., additional, Maraschek, M., additional, Mast, K.-F., additional, McCarthy, P.J., additional, Meisel, D., additional, Meister, H., additional, Meo, F., additional, Merkel, R., additional, Mertens, V., additional, Meskat, J.P., additional, Monk, R., additional, Müller, H.W., additional, Münich, M., additional, Murmann, H., additional, Neu, G., additional, Neu, R., additional, Neuhauser, J., additional, Noterdaeme, J.-M., additional, Nunes, I., additional, Pautasso, G., additional, Peeters, A.G., additional, Pereverzev, G., additional, Pinches, S., additional, Poli, E., additional, Pugno, R., additional, Raupp, G., additional, Ribeiro, T., additional, Riedl, R., additional, Riondato, S., additional, Rohde, V., additional, Röhr, H., additional, Roth, J., additional, Ryter, F., additional, Salzmann, H., additional, Sandmann, W., additional, Sarelma, S., additional, Schade, S., additional, Schilling, H.-B., additional, Schlögl, D., additional, Schmidtmann, K., additional, Schneider, R., additional, Schneider, W., additional, Schramm, G., additional, Schweinzer, J., additional, Schweizer, S., additional, Scott, B.D., additional, Seidel, U., additional, Serra, F., additional, Sesnic, S., additional, Sihler, C., additional, Silva, A., additional, Sips, A., additional, Speth, E., additional, Stäbler, A., additional, Steuer, K.-H., additional, Stober, J., additional, Streibl, B., additional, Strumberger, E., additional, Suttrop, W., additional, Tabasso, A., additional, Tanga, A., additional, Tardini, G., additional, Tichmann, C., additional, Treutterer, W., additional, Troppmann, M., additional, Tsois, N., additional, Ullrich, W., additional, Ulrich, M., additional, Varela, P., additional, Vollmer, O., additional, Wenzel, U., additional, Wesner, F., additional, Wolf, R., additional, Wolfrum, E., additional, Wunderlich, R., additional, Xantopoulos, N., additional, Yu, Q., additional, Zarrabian, M., additional, Zasche, D., additional, Zehetbauer, T., additional, Zehrfeld, H.-P., additional, Zeiler, A., additional, and Zohm, H., additional
- Published
- 2001
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91. Implementation of the new multichannel X-mode edge density profile reflectometer for the ICRF antenna on ASDEX Upgrade.
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Aguiam, D. E., Silva, A., Bobkov, V., Carvalho, P. J., Carvalho, P. F., Cavazzana, R., Conway, G. D., D'Arcangelo, O., Fattorini, L., Faugel, H., Fernandes, A., Fünfgelder, H., Gonçalves, B., Guimarais, L., De Masi, G., Meneses, L., Noterdaeme, J. M., Pereira, R. C., Rocchi, G., and Santos, J. M.
- Subjects
CYCLOTRON resonance ,ELECTRON distribution ,REFLECTOMETER ,ELECTRON density ,ION cyclotron resonance spectrometry ,PLASMA density - Abstract
A new multichannel frequency modulated continuous-wave reflectometry diagnostic has been successfully installed and commissioned on ASDEX Upgrade to measure the plasma edge electron density profile evolution in front of the Ion Cyclotron Range of Frequencies (ICRF) antenna. The design of the new three-strap ICRF antenna integrates ten pairs (sending and receiving) of microwave reflectometry antennas. The multichannel reflectometer can use three of these to measure the edge electron density profiles up to 2 × 10
19 m-3 , at different poloidal locations, allowing the direct study of the local plasma layers in front of the ICRF antenna. ICRF power coupling, operational effects, and poloidal variations of the plasma density profile can be consistently studied for the first time. In this work the diagnostic hardware architecture is described and the obtained density profile measurements were used to track outer radial plasma position and plasma shape. [ABSTRACT FROM AUTHOR]- Published
- 2016
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92. Experimental results from ICRF on ASDEX upgrade.
- Author
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Wesner, F., Becker, W., Brambilla, M., Braun, F., Faugel, H., Hartmann, D., Hofmeister, F., Noterdaeme, J.-M., Sperger, Th., and Wukitch, S.
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- 1997
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93. Achievement of the H-mode with a screenless ICRF antenna in ASDEX Upgrade.
- Author
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Noterdaeme, J.-M., Becker, W., Braun, F., Faugel, H., Fuchs, J. C., Herrmann, W., Hoffmann, C., Hofmeister, F., Neu, R., Suttrop, W., Schweinzer, J., Verplancke, P., and Wesner, F.
- Published
- 1996
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94. Recent results from ICRF experiments on ASDEX upgrade.
- Author
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Wesner, F., Becker, W., Braun, F., Faugel, H., Hoffmann, C., Hofmeister, F., Neu, R., Noterdaeme, J.-M., Schittenhelm, M., Sperger, T., Verplancke, P., and Wedler, H.
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- 1996
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95. Overview of recent ICRF studies and RF-related wave-field measurements on ASDEX upgrade.
- Author
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Ochoukov, R., Bilato, R., Bobkov, V., Casagrande, R., Faugel, H., Kazakov, Ye. O., Kostic, A., Mantsinen, M. J., McClements, K. G., Noterdaeme, J.-M., Schneider, P., López, G. Suárez, Tierens, W., Usoltceva, M., Weiland, M., Zhang, W., Bonoli, Paul, Pinsker, Robert, and Wang, Xiaojie
- Subjects
PLASMA physics ,PLASMA oscillations ,PLASMA density ,ELECTROMAGNETS ,TOROIDAL plasma ,STRESS waves ,QUALITY factor - Abstract
This manuscript overviews the latest developments and results from the ASDEX Upgrade ICRF team. The ICRF control system has been upgraded to allow the operation of active antennas with a controlled arbitrary phase difference between them. This upgrade, in combination with an extensive RF probe coverage inside the ASDEX Upgrade torus, makes it possible to study a global wave phenomenon that may result from the two antenna pairs' fields. The first results show that multiple active antennas form a superposition of the launched waves, with limited plasma shielding. A combination of high- and low-field side RF probes makes it possible to study the efficiency of various heating schemes such as the hydrogen minority or the 3-ion species scheme with a He-3 minority. The effect of the hydrogen minority concentration on the ICRF wave absorption and transmission through the core is best shown during conditioning discharges following a torus opening: as the hydrogen fraction is reduced from 80% to below 20%, the amplitude of the RF waves that reaches the high-field side probes is reduced by nearly two orders of magnitude indicating a strong absorption increase. The experimental results are supported by full wave FELICE code showing a similar absorption improvement as a function of the hydrogen fraction. The low-field side probes, on the other hand, do not show a sensitivity to the hydrogen fraction, which is expected as the low-field side wave amplitude is dependent on antenna coupling, not wave absorption. For the case of the 3-ion heating scheme, the high-field side probes detect a minimum in the wave amplitude as the wave absorption layer is radially scanned past the optimal position in the core. The minimum is interpreted as the optimal core absorption condition and matches the observed maximum in the core soft x-ray data. The optimal radial position of the wave absorption layer is also indirectly indicated via the appearance of strong ion cyclotron emission (ICE). The frequency of ICE is matched with the cyclotron frequency of RF-accelerated He-3 ions and the emission origin is placed ∼midway between the magnetic axis and the separatrix. In order to self-consistently assess the global ICRF wave behavior, it is necessary to account for the three dimensional (3D) nature of the toroidal tokamak plasma and the launching antenna structures. The ASDEX Upgrade ICRF team studies multiple aspects of how 3D effects influence launched ICRF wave fields and antenna performance. These include 3D plasma density perturbations in the plasma edge and the scrape off layer, either intrinsically generated by turbulence or externally imposed by resonant magnetic perturbation coils. The experimental study is supported with RAPLICASOL: a computational tool that solves for launched ICRF wave fields in the presence of realistic 3D plasma density profiles and antenna geometry. Additionally, the work of the ASDEX Upgrade ICRF team includes fundamental plasma physics and RF wave studies on the linear test device IShTAR: the areas of interest are RF sheath rectification and arc formation. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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96. Publisher's Note: "Ion temperature measurement techniques using fast sweeping retarding field analyzer (RFA) in strongly intermittent ASDEX Upgrade tokamak plasmas" [Rev. Sci. Instrum. 91, 063506 (2020)].
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Ochoukov, R., Dreval, M., Bobkov, V., Faugel, H., Herrmann, A., Kammerloher, L., and Leitenstern, P.
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ION temperature ,TEMPERATURE measurements ,INTERNET publishing - Published
- 2020
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97. Overview of ASDEX Upgrade results
- Author
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Kallenbach, A., Aguiam, D., Aho-Mantila, L., Angioni, C., Arden, N., Parra, R. Arredondo, Asunta, O., Baar, M., Balden, M., Behler, K., Bergmann, A., Bernardo, J., Bernert, M., Beurskens, M., Biancalani, A., Bilato, R., Birkenmeier, G., Bobkov, V., Bock, A., Bogomolov, A., Bolzonella, T., Boswirth, B., Bottereau, C., Bottino, A., Brand, H., Brezinsek, S., Brida, D., Brochard, F., Bruhn, C., Buchanan, J., Buhler, A., Burckhart, A., Cambon-Silva, D., Camenen, Y., Carvalho, P., Carrasco, G., Cazzaniga, C., Carr, M., Carralero, D., Casali, L., Castaldo, C., Cavedon, M., Challis, C., Chankin, A., Chapman, I., Clairet, F., Classen, I., Coda, S., Coelho, R., Coenen, J. W., Colas, L., Conway, G., Costea, S., Coster, D. P., Croci, G., Cseh, G., Czarnecka, A., D Arcangelo, O., Day, C., Delogu, R., Marne, P., Denk, S., Denner, P., Dibon, M., D Inca, R., Di Siena, A., Douai, D., Drenik, A., Drube, R., Dunne, M., Duval, B. P., Dux, R., Eich, T., Elgeti, S., Engelhardt, K., Erdos, B., Erofeev, I., Esposito, B., Fable, E., Faitsch, M., Fantz, U., Faugel, H., Felici, F., Fietz, S., Figueredo, A., Fischer, R., Ford, O., Frassinetti, L., Freethy, S., Froschle, M., Fuchert, G., Fuchs, J. C., Funfgelder, H., Galazka, K., Galdon-Quiroga, J., Gallo, A., Gao, Y., Garavaglia, S., Garcia-Munoz, M., Geiger, B., Cianfarani, C., Giannone, L., Giovannozzi, E., Gleason-Gonzalez, C., Gloggler, S., Gobbin, M., Gorler, T., Goodman, T., Gorini, G., Gradic, D., Grater, A., Granucci, G., Greuner, H., Griener, M., Groth, M., Gude, A., Gunter, S., Guimarais, L., Haas, G., Hakola, A. H., Ham, C., Happel, T., Harrison, J., Hatch, D., Hauer, V., Hayward, T., Heinemann, B., Heinzel, S., Hellsten, T., Henderson, S., Hennequin, P., Herrmann, A., Heyn, E., Hitzler, F., Hobirk, J., Holzl, M., Hoschen, T., Holm, J. H., Hopf, C., Hoppe, F., Horvath, L., Houben, A., Huber, A., Igochine, V., Ilkei, T., Ivanova-Stanik, I., Jacob, W., Jacobsen, A. S., Jacquot, J., Janky, F., Jardin, A., Jaulmes, F., Jenko, F., Jensen, T., Joffrin, E., Kasemann, C., Kalvin, S., Kantor, M., Kappatou, A., Kardaun, O., Karhunen, J., Kasilov, S., Kernbichler, W., Kim, D., Kimmig, S., Kirk, A., Klingshirn, H. -J, Koch, F., Kocsis, G., Kohn, A., Kraus, M., Krieger, K., Krivska, A., Kramer-Flecken, A., Kurki-Suonio, T., Kurzan, B., Lackner, K., Laggner, F., Lang, P. T., Lauber, P., Lazanyi, N., Lazaros, A., Lebschy, A., Li, L., Li, M., Liang, Y., Lipschultz, B., Liu, Y., Lohs, A., Luhmann, N. C., Lunt, T., Lyssoivan, A., Madsen, J., Maier, H., Maj, O., Mailloux, J., Maljaars, E., Manas, P., Mancini, A., Manhard, A., Manso, M. -E, Mantica, P., Mantsinen, M., Manz, P., Maraschek, M., Martens, C., Martin Oberkofler, Marrelli, L., Martitsch, A., Mastrostefano, S., Mayer, A., Mayer, M., Mazon, D., Mccarthy, P. J., Mcdermott, R., Meisl, G., Meister, H., Medvedeva, A., Merkel, P., Merkel, R., Merle, A., Mertens, V., Meshcheriakov, D., Meyer, H., Meyer, O., Miettunen, J., Milanesio, D., Mink, F., Mlynek, A., Monaco, F., Moon, C., Nazikian, R., Nemes-Czopf, A., Neu, G., Neu, R., Nielsen, A. H., Nielsen, S. K., Nikolaeva, V., Nocente, M., Noterdaeme, J. -M, Nowak, S., Oberkofler, M., Oberparleiter, M., Ochoukov, R., Odstrcil, T., Olsen, J., Orain, F., Palermo, F., Papp, G., Perez, I. Paradela, Pautasso, G., Enzel, F., Petersson, P., Pinzon, J., Piovesan, P., Piron, C., Plaum, B., Plockl, B., Plyusnin, V., Pokol, G., Poli, E., Porte, L., Potzel, S., Prisiazhniuk, D., Putterich, T., Ramisch, M., Rapson, C., Rasmussen, J., Raupp, G., Refy, D., Reich, M., Reimold, F., Ribeiro, T., Riedl, R., Rittich, D., Rocchi, G., Rodriguez-Ramos, M., Rohde, V., Ross, A., Rott, M., Rubel, M., Ryan, D., Ryter, F., Saarelma, S., Salewski, M., Salmi, A., Sanchis-Sanchez, L., Santos, G., Santos, J., Sauter, O., Scarabosio, A., Schall, G., Schmid, K., Schmitz, O., Schneider, P. A., Schneller, M., Schrittwieser, R., Schubert, M., Schwarz-Selinger, T., Schweinzer, J., Scott, B., Sehmer, T., Sertoli, M., Shabbir, A., Shalpegin, A., Shao, L., Sharapov, S., Siccinio, M., Sieglin, B., Sigalov, A., Silva, A., Silva, C., Simon, P., Simpson, J., Snicker, A., Sommariva, C., Sozzi, C., Spolaore, M., Stejner, M., Stober, J., Stobbe, F., Stroth, U., Strumberger, E., Suarez, G., Sugiyama, K., Sun, H. -J, Suttrop, W., Szepesi, T., Tal, B., Tala, T., Tardini, G., Tardocchi, M., Terranova, D., Tierens, W., Told, D., Tudisco, O., Trevisan, G., Treutterer, W., Trier, E., Tripsky, M., Valisa, M., Valovic, M., Vanovac, B., Varela, P., Varoutis, S., Verdoolaege, G., Vezinet, D., Vianello, N., Vicente, J., Vierle, T., Viezzer, E., Toussaint, U., Wagner, D., Wang, N., Wang, X., Weidl, M., Weiland, M., White, A. E., Willensdorfer, M., Wiringer, B., Wischmeier, M., Wolf, R., Wolfrum, E., Xiang, L., Yang, Q., Yang, Z., Yu, Q., Zagorski, R., Zammuto, I., Zarzoso, D., Zhang, W., Zeeland, M., Zehetbauer, T., Zilker, M., Zoletnik, S., Zohm, H., Team, Asdex Upgrade, Team, Eurofusion Mst, Institute of Forest Botany, Georg-August-University [Göttingen], Dutch Institute for Fundamental Energy Research [Eindhoven] (DIFFER), Institute of Applied Physics (IFA - CSIC), GRIDSEN, IPFN, Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Institut de biologie et chimie des protéines [Lyon] (IBCP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Univ Tennessee, Dept Mat Sci & Engn, The University of Tennessee [Knoxville], Technical Research Centre of Finland, VTT Technical Research Centre of Finland (VTT), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), CEA Cadarache, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Department of Information Technology (INTEC), Universiteit Gent = Ghent University [Belgium] (UGENT), Institut für Geophysik [Clausthal-Zellerfeld], Technische Universität Clausthal (TU Clausthal), Association EURATOM-ÖAW, University of Innsbruck, Institut für Plasmaforschung [Stuttgart] (IPF), Universität Stuttgart [Stuttgart], Institute of Plasma Physics, Association Euratom/IPP.CR (IPP PRAGUE), Czech Academy of Sciences [Prague] (CAS), Department of Cancer Biology, University of Massachusetts Medical School [Worcester] (UMASS), University of Massachusetts System (UMASS)-University of Massachusetts System (UMASS), Institut de Recherche sur la Fusion par confinement Magnétique (IRFM), Dipartimento di Fisica Università di Torino and INFN (DF_TORINO), Dipartimento di Fisica infi & Università di Torino, Forschungszentrum Jülich GmbH | Centre de recherche de Juliers, Helmholtz-Gemeinschaft = Helmholtz Association, Institut d'Electronique du Solide et des Systèmes (InESS), Centre National de la Recherche Scientifique (CNRS), Institut Jean Lamour (IJL), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences des Procédés et des Matériaux (LSPM), Université Paris 13 (UP13)-Institut Galilée-Université Sorbonne Paris Cité (USPC)-Centre National de la Recherche Scientifique (CNRS), Institute for World Forestry, Johann Heinrich von Thünen Institute, Sygen International Plc, Genus Plc, Institut de biologie moléculaire des plantes (IBMP), Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Institut für Experimentelle und Angewandte Physik [Kiel] (IEAP), Christian-Albrechts-Universität zu Kiel (CAU), Department of Experimental Medical Science, AUTRES, Max-Planck-Institut für Plasmaphysik [Garching] (IPP), Department of Obstetrics and Gynecology, Goethe-Universität Frankfurt am Main, Euratom/CCFE Fusion Association, Atomic Energy Research Institute [Budapest], Centre for Energy Research [Budapest] (MTAE), Hungarian Academy of Sciences (MTA)-Hungarian Academy of Sciences (MTA), Science et Ingénierie des Matériaux et Procédés (SIMaP), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Institut National Polytechnique de Grenoble (INPG), ENEA C.R. Frascati, Via E. Fermi, 45, 00044 Frascati, Roma, Italy, affiliation inconnue, Department of Radiology, St. James's Hospital, Dept of Mechanical and Process Engineering, Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Database group, Computer Science and engeenering Department [San Diego] (DB CSE UCSD), University of California [San Diego] (UC San Diego), University of California-University of California, F. Hoffmann-La RocheAG, Dutch Institute for Fundamental Energy Research [Eindhoven] ( DIFFER ), Institute of Applied Physics ( IFA - CSIC ), Instituto Superior Técnico, Universidade Técnica de Lisboa ( IST ), Institut de Microélectronique, Electromagnétisme et Photonique - Laboratoire d'Hyperfréquences et Caractérisation ( IMEP-LAHC ), Centre National de la Recherche Scientifique ( CNRS ) -Université Savoie Mont Blanc ( USMB [Université de Savoie] [Université de Chambéry] ) -Institut National Polytechnique de Grenoble ( INPG ) -Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut polytechnique de Grenoble - Grenoble Institute of Technology ( Grenoble INP ) -Université Grenoble Alpes ( UGA ), Institut de biologie et chimie des protéines [Lyon] ( IBCP ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ), VTT Technical Research Centre of Finland ( VTT ), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung ( AWI ), Laboratoire de Science et Génie des Matériaux et de Métallurgie ( LSG2M ), Université Henri Poincaré - Nancy 1 ( UHP ) -Institut National Polytechnique de Lorraine ( INPL ) -Centre National de la Recherche Scientifique ( CNRS ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ), Department of Information Technology ( INTEC ), Ghent University [Belgium] ( UGENT ), Institut fur Geophysical, IPF, Institute of Plasma Physics, Association Euratom/IPP.CR ( IPP PRAGUE ), Czech Academy of Sciences [Prague] ( ASCR ), University of Massachusetts Medical School [Worcester] ( UMASS ), Institut de Recherche sur la Fusion par confinement Magnétique ( IRFM ), Dipartimento di Fisica Università di Torino and INFN ( DF_TORINO ), Forschungszentrum Jülich GmbH, Institut d'Electronique du Solide et des Systèmes ( InESS ), Centre National de la Recherche Scientifique ( CNRS ), Institut Jean Lamour ( IJL ), Centre National de la Recherche Scientifique ( CNRS ) -Université de Lorraine ( UL ), Laboratoire des Sciences des Procédés et des Matériaux ( LSPM ), Université Paris 13 ( UP13 ) -Université Sorbonne Paris Cité ( USPC ) -Institut Galilée-Centre National de la Recherche Scientifique ( CNRS ), Institut de biologie moléculaire des plantes ( IBMP ), Université de Strasbourg ( UNISTRA ) -Centre National de la Recherche Scientifique ( CNRS ), IEAP, Christian-Albrechts-Universität zu Kiel ( CAU ), Max-Planck-Institut für Plasmaphysik [Garching] ( IPP ), J. W. Goethe-University, Hungarian Academy of Sciences KFKI Atomic Energy Research Institute, Science et Ingénierie des Matériaux et Procédés ( SIMaP ), Université Joseph Fourier - Grenoble 1 ( UJF ) -Institut polytechnique de Grenoble - Grenoble Institute of Technology ( Grenoble INP ) -Institut National Polytechnique de Grenoble ( INPG ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes ( UGA ), Laboratoire de Physique Corpusculaire - Clermont-Ferrand ( LPC ), Université Blaise Pascal - Clermont-Ferrand 2 ( UBP ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Centre National de la Recherche Scientifique ( CNRS ), university college cork, University College Cork ( UCC ), Eidgenössische Technische Hochschule [Zürich] ( ETH Zürich ), Database group, Computer Science and engeenering Department [San Diego] ( DB CSE UCSD ), University of California [San Diego] ( UC San Diego ), Aguiam, D, Aho-Mantila, L, Angioni, C, Arden, N, Parra, R, Asunta, O, Debaar, M, Balden, M, Behler, K, Bergmann, A, Bernardo, J, Bernert, M, Beurskens, M, Biancalani, A, Bilato, R, Birkenmeier, G, Bobkov, V, Bock, A, Bogomolov, A, Bolzonella, T, Boeswirth, B, Bottereau, C, Bottino, A, Van den Brand, H, Brezinsek, S, Brida, D, Brochard, F, Bruhn, C, Buchanan, J, Buhler, A, Burckhart, A, Cambon-Silva, D, Camenen, Y, Carvalho, P, Carrasco, G, Cazzaniga, C, Carr, M, Carralero, D, Casali, L, Castaldo, C, Cavedon, M, Challis, C, Chankin, A, Chapman, I, Clairet, F, Classen, I, Coda, S, Coelho, R, Coenen, J, Colas, L, Conway, G, Costea, S, Coster, D, Croci, G, Cseh, G, Czarnecka, A, D'Arcangelo, O, Day, C, Delogu, R, de Marne, P, Denk, S, Denner, P, Dibon, M, D'Inca, R, Disiena, A, Douai, D, Drenik, A, Drube, R, Dunne, M, Duval, B, Dux, R, Eich, T, Elgeti, S, Engelhardt, K, Erdos, B, Erofeev, I, Esposito, B, Fable, E, Faitsch, M, Fantz, U, Faugel, H, Felici, F, Fietz, S, Figueredo, A, Fischer, R, Ford, O, Frassinetti, L, Freethy, S, Froeschle, M, Fuchert, G, Fuchs, J, Fuenfgelder, H, Galazka, K, Galdon-Quiroga, J, Gallo, A, Gao, Y, Garavaglia, S, Garcia-Munoz, M, Geiger, B, Cianfarani, C, Giannone, L, Giovannozzi, E, Gleason-Gonzalez, C, Gloeggler, S, Gobbin, M, Goerler, T, Goodman, T, Gorini, G, Gradic, D, Graeter, A, Granucci, G, Greuner, H, Griener, M, Groth, M, Gude, A, Guenter, S, Guimarais, L, Haas, G, Hakola, A, Ham, C, Happel, T, Harrison, J, Hatch, D, Hauer, V, Hayward, T, Heinemann, B, Heinzel, S, Hellsten, T, Henderson, S, Hennequin, P, Herrmann, A, Heyn, E, Hitzler, F, Hobirk, J, Hoelzl, M, Hoeschen, T, Holm, J, Hopf, C, Hoppe, F, Horvath, L, Houben, A, Huber, A, Igochine, V, Ilkei, T, Ivanova-Stanik, I, Jacob, W, Jacobsen, A, Jacquot, J, Janky, F, Jardin, A, Jaulmes, F, Jenko, F, Jensen, T, Joffrin, E, Kaesemann, C, Kallenbach, A, Kalvin, S, Kantor, M, Kappatou, A, Kardaun, O, Karhunen, J, Kasilov, S, Kernbichler, W, Kim, D, Kimmig, S, Kirk, A, Klingshirn, H, Koch, F, Kocsis, G, Koehn, A, Kraus, M, Krieger, K, Krivska, A, Kraemr-Flecken, A, Kurki-Suonio, T, Kurzan, B, Lackner, K, Laggner, F, Lang, P, Lauber, P, Lazanyi, N, Lazaros, A, Lebschy, A, Li, L, Li, M, Liang, Y, Lipschultz, B, Liu, Y, Lohs, A, Luhmann, N, Lunt, T, Lyssoivan, A, Madsen, J, Maier, H, Maj, O, Mailloux, J, Maljaars, E, Manas, P, Mancini, A, Manhard, A, Manso, M, Mantica, P, Mantsinen, M, Manz, P, Maraschek, M, Martens, C, Martin, P, Marrelli, L, Martitsch, A, Mastrostefano, S, Mayer, A, Mayer, M, Mazon, D, Mccarthy, P, Mcdermott, R, Meisl, G, Meister, H, Medvedeva, A, Merkel, P, Merkel, R, Merle, A, Mertens, V, Meshcheriakov, D, Meyer, H, Meyer, O, Miettunen, J, Milanesio, D, Mink, F, Mlynek, A, Monaco, F, Moon, C, Nazikian, R, Nemes-Czopf, A, Neu, G, Neu, R, Nielsen, A, Nielsen, S, Nikolaeva, V, Nocente, M, Noterdaeme, J, Nowak, S, Oberkofler, M, Oberparleiter, M, Ochoukov, R, Odstrcil, T, Olsen, J, Orain, F, Palermo, F, Papp, G, Paradela Perez, I, Pautasso, G, Enzel, F, Petersson, P, Pinzon, J, Piovesan, P, Piron, C, Plaum, B, Ploeckl, B, Plyusnin, V, Pokol, G, Poli, E, Porte, L, Potzel, S, Prisiazhniuk, D, Puetterich, T, Ramisch, M, Rapson, C, Rasmussen, J, Raupp, G, Refy, D, Reich, M, Reimold, F, Ribeiro, T, Riedl, R, Rittich, D, Rocchi, G, Rodriguez-Ramos, M, Rohde, V, Ross, A, Rott, M, Rubel, M, Ryan, D, Ryter, F, Saarelma, S, Salewski, M, Salmi, A, Sanchis-Sanchez, L, Santos, G, Santos, J, Sauter, O, Scarabosio, A, Schall, G, Schmid, K, Schmitz, O, Schneider, P, Schneller, M, Schrittwieser, R, Schubert, M, Schwarz-Selinger, T, Schweinzer, J, Scott, B, Sehmer, T, Sertoli, M, Shabbir, A, Shalpegin, A, Shao, L, Sharapov, S, Siccinio, M, Sieglin, B, Sigalov, A, Silva, A, Silva, C, Simon, P, Simpson, J, Snicker, A, Sommariva, C, Sozzi, C, Spolaore, M, Stejner, M, Stober, J, Stobbe, F, Stroth, U, Strumberger, E, Suarez, G, Sugiyama, K, Sun, H, Suttrop, W, Szepesi, T, Tal, B, Tala, T, Tardini, G, Tardocchi, M, Terranova, D, Tierens, W, Told, D, Tudisco, O, Trevisan, G, Treutterer, W, Trier, E, Tripsky, M, Valisa, M, Valovic, M, Vanovac, B, Varela, P, Varoutis, S, Verdoolaege, G, Vezinet, D, Vianello, N, Vicente, J, Vierle, T, Viezzer, E, von Toussaint, U, Wagner, D, Wang, N, Wang, X, Weidl, M, Weil, White, A, Willensdorfer, M, Wiringer, B, Wischmeier, M, Wolf, R, Wolfrum, E, Xiang, L, Yang, Q, Yang, Z, Yu, Q, Zagorski, R, Zammuto, I, Zarzoso, D, Zhang, W, van Zeeland, M, Zehetbauer, T, Zilker, M, Zoletnik, S, Zohm, H, Physique des interactions ioniques et moléculaires (PIIM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratoire de Physique des Plasmas (LPP), Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), York Plasma Institute (YPI), University of York [York, UK], EURATOM/CCFE Fusion Association, Culham Science Centre [Abingdon], Istituto di Fisica del Plasma, EURATOM-ENEA-CNR Association, Consiglio Nazionale delle Ricerche [Roma] (CNR), Leopold Franzens Universität Innsbruck - University of Innsbruck, Institute of Plasma Physics [Praha], Association EURATOM-TEKES, Helsinki University of Technology, Finland, Instituto de Plasmas e Fusão Nuclear [Lisboa] (IPFN), Institute of Atomic Physics, Université de Roumanie, FOM Institute for Atomic and Molecular Physics (AMOLF), FOM Institute DIFFER - Dutch Institute for Fundamental Energy Research, The Netherlands, Culham Centre for Fusion Energy (CCFE), University College Cork (UCC), Italian National agency for new technologies, Energy and sustainable economic development [Frascati] (ENEA), KFKI Research Institute for Particle and Nuclear Physics (KFKI-RMKI), National Technical University of Athens [Athens] (NTUA), Danmarks Tekniske Universitet = Technical University of Denmark (DTU), Department of Mechanical and Aerospace Engineering [Univ California San Diego] (MAE - UC San Diego), University of California (UC)-University of California (UC), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), General Atomics [San Diego], Ricerca Formazione Innovazione (Consorzio RFX), Warsaw University of Technology [Warsaw], Physique des interactions ioniques et moléculaires ( PIIM ), Aix Marseille Université ( AMU ) -Centre National de la Recherche Scientifique ( CNRS ), Max Planck Institute for Plasma Physics, Ecole Polytechnique Fédérale de Lausanne ( EPFL ), Laboratoire de Physique des Plasmas ( LPP ), Université Paris-Sud - Paris 11 ( UP11 ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -Observatoire de Paris-École polytechnique ( X ) -Sorbonne Universités-PSL Research University ( PSL ) -Université Paris-Saclay-Centre National de la Recherche Scientifique ( CNRS ), York Plasma Institute ( YPI ), Culham Science Centre, Consiglio Nazionale delle Ricerche [Roma] ( CNR ), Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear, Universidad de Sevilla. RNM138: Física Nuclear Aplicada, IST, VTT Technical Research Centre of Finland, Max Planck Inst Astrophys, Max Planck Society, Department of Applied Physics, TEC, JET EFDA, Culham Sci Ctr, Technische Universität München, Consorzio RFX, IRFM, Assoc EURATOM FZJ, Euratom, Julich Research Center, Forschungszentrum Julich, Inst Energy & Climate Res, University of Lorraine, ENEA, Istituto Fisica del Plasma 'Piero Caldirola' (IFP-CNR), Swiss Federal Institute of Technology Lausanne, Innsbruck Medical University, Hungarian Academy of Sciences, Institute of Plasma Physics & Laser Microfusion (IFPiLM), Karlsruhe Institute of Technology, Eindhoven University of Technology, Swedish Research Council (VR), General Atomics & Affiliated Companies, University of Sevilla, University of Texas at Austin, Max Planck Comp & Data Facil, Ecole Polytechnique, Hochschule der Medien, Technical University of Denmark, Budapest University of Technology and Economics, University of California at Santa Barbara, School services, SCI, LPP-ERM/KMS EURATOM Association, Vienna University of Technology, Assoc EURATOM Hellen Republ, NCSR Demokritos, IPP, York University, CCFE Fusion Assoc, BSC, Univ Coll Cork UCC, Princeton University, Ghent University, Chinese Acad Sci, Chinese Academy of Sciences, Natl Astron Observ, Department of Radio Science and Engineering, Massachusetts Institute of Technology, Chinese Academy of Sciences, Univ Aix Marseille 1, Centre National de la Recherche Scientifique (CNRS), University of Aix-Marseille, Universite de Provence - Aix-Marseille I, UMR 6098, CNRS, Aalto-yliopisto, Aalto University, Massachusetts Institute of Technology. Plasma Science and Fusion Center, White, Anne E., Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Arslanbekov, R, Atanasiu, C, Becker, G, Becker, W, Behringer, K, Bolshukhin, D, Borrass, K, Brambilla, M, Braun, F, Carlson, A, Egorov, S, Fahrbach, H, Finken, K, Foley, M, Franzen, P, Gafert, J, Fournier, K, Gantenbein, G, Gehre, O, Geier, A, Gernhardt, J, Gruber, O, Gunter, S, Hartmann, D, Heger, B, Hofmeister, F, Hohenocker, H, Horton, L, Jacchia, A, Jakobi, M, Kaufmann, M, Keller, A, Kendl, A, Kim, J, Kirov, K, Kochergov, R, Kollotzek, H, Kraus, W, Lasnier, C, Laux, M, Leonard, A, Leuterer, F, Lorenz, A, Lorenzini, R, Maggi, C, Mank, K, Martines, E, Mast, K, Meisel, D, Meo, F, Merkl, D, Muck, A, Muller, H, Munich, M, Murmann, H, Na, Y, Neuhauser, J, Nguyen, F, Nishijima, D, Nishimura, Y, Nunes, I, Peeters, A, Pereverzev, G, Pinches, S, Proschek, M, Pugno, R, Quigley, E, Roth, J, Sandmann, W, Savtchkov, A, Schade, S, Schilling, H, Schneider, W, Schramm, G, Schwarz, E, Schweizer, S, Seidel, U, Serra, F, Sesnic, S, Sihler, C, Sips, A, Speth, E, Stabler, A, Steuer, K, Streibl, B, Tabasso, A, Tanga, A, Tichmann, C, Troppmann, M, Urano, H, Vollmer, O, Wenzel, U, Wesner, F, Westerhof, E, Wursching, E, Yoon, S, Zasche, D, Zehrfeld, H, Barcelona Supercomputing Center, ASDEX Upgrade Team, Max Planck Institute for Plasma Physics, Max Planck Society, EUROfusion MST1 Team, Adamek, J, Aho Mantila, L, Akaslompolo, S, Amdor, C, Bardin, S, Orte, L, Belonohy, E, Boom, J, Brochard, T, Bruedgam, M, Casson, F, Curran, D, da Silva, F, Eixenberger, H, Endstrasser, N, Gal, K, Munoz, M, da Graca, S, Hangan, D, Haertl, T, Hauff, T, Hoehnle, H, Ionita, C, Janzer, A, Kasparek, W, Kocan, M, Konz, C, Koslowski, R, Kubic, M, Kurki Suonio, T, Leipold, F, Lindig, S, Lisgo, S, Makkonen, T, Mehlmann, F, Menchero, L, Merz, F, Mueller, S, Mueller, H, Muenich, M, Neuwirth, D, Nold, B, Podoba, Y, Pompon, F, Polozhiy, K, Pueschel, M, Rathgeber, S, Rooij, G, Sauter, P, Sempf, M, Sommer, F, Staebler, A, Teschke, M, Tsalas, M, Van Zeeland, M, Veres, G, Viola, B, Vorpahl, C, Wachowski, M, Wauters, T, Weller, A, Wenninger, R, Wieland, B, Wuersching, E, Zhang, Y, Science and Technology of Nuclear Fusion, Max Planck IPP-EURATOM Assoziation, Universidade de Lisboa, Dutch Institute for Fundamental Energy Research, Technical University of Munich, IRFM-CEA, Forschungszentrum Jülich, Université de Lorraine, and École Polytechnique Fedérale de Lausanne
- Subjects
Nuclear and High Energy Physics ,Tokamak ,Materials science ,Energies [Àrees temàtiques de la UPC] ,114 Physical sciences ,7. Clean energy ,01 natural sciences ,Electron cyclotron resonance ,H-MODE DISCHARGES ,010305 fluids & plasmas ,law.invention ,ASDEX Upgrade, overview ,ASDEX Upgrade ,law ,[PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] ,Physics::Plasma Physics ,ITER ,0103 physical sciences ,Fusió nuclear ,[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering ,010306 general physics ,tokamak ,DEMO ,tokamak physic ,Fusion reactions ,nuclear fusion ,Divertor ,Magnetic confinement fusion ,[ SPI.GPROC ] Engineering Sciences [physics]/Chemical and Process Engineering ,[ PHYS.PHYS.PHYS-PLASM-PH ] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph] ,Fusion power ,Condensed Matter Physics ,___ ,Plasma parameter ,Plasma diagnostics ,Atomic physics ,tokamak physics - Abstract
The ASDEX Upgrade (AUG) programme is directed towards physics input to critical elements of the ITER design and the preparation of ITER operation, as well as addressing physics issues for a future DEMO design. Since 2015, AUG is equipped with a new pair of 3-strap ICRF antennas, which were designed for a reduction of tungsten release during ICRF operation. As predicted, a factor two reduction on the ICRF-induced W plasma content could be achieved by the reduction of the sheath voltage at the antenna limiters via the compensation of the image currents of the central and side straps in the antenna frame. There are two main operational scenario lines in AUG. Experiments with low collisionality, which comprise current drive, ELM mitigation/suppression and fast ion physics, are mainly done with freshly boronized walls to reduce the tungsten influx at these high edge temperature conditions. Full ELM suppression and non-inductive operation up to a plasma current of I p = 0.8 MA could be obtained at low plasma density. Plasma exhaust is studied under conditions of high neutral divertor pressure and separatrix electron density, where a fresh boronization is not required. Substantial progress could be achieved for the understanding of the confinement degradation by strong D puffing and the improvement with nitrogen or carbon seeding. Inward/outward shifts of the electron density profile relative to the temperature profile effect the edge stability via the pressure profile changes and lead to improved/decreased pedestal performance. Seeding and D gas puffing are found to effect the core fueling via changes in a region of high density on the high field side (HFSHD). The integration of all above mentioned operational scenarios will be feasible and naturally obtained in a large device where the edge is more opaque for neutrals and higher plasma temperatures provide a lower collisionality. The combination of exhaust control with pellet fueling has been successfully demonstrated. High divertor enrichment values of nitrogen E N ⩾ 10 have been obtained during pellet injection, which is a prerequisite for the simultaneous achievement of good core plasma purity and high divertor radiation levels. Impurity accumulation observed in the all-metal AUG device caused by the strong neoclassical inward transport of tungsten in the pedestal is expected to be relieved by the higher neoclassical temperature screening in larger devices.
98. Characterization of the RF plasma in ISHTAR
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D Inca, R., Kostic, A., Ochoukov, R., Kristel Crombe, Usoltseva, M., Moreno, J., Nikiforov, A., Jacquot, J., Louche, F., Eester, D., Heuraux, S., Devaux, S., Moritz, J., Faudot, E., Fischer, F., Siegl, G., Fünfgelder, H., Faugel, H., and Noterdaeme, J. -M
99. Evolution of nitrogen concentration and ammonia production in N-2-seeded H-mode discharges at ASDEX Upgrade
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Drenik, A., Laguardia, L., McDermott, R., Meisl, G., Neu, R., Oberkofler, M., Pawelec, E., Pitts, R. A., Puetterich, T., Reichbauer, T., Rohde, V., Seibt, M., De Temmerman, G., Zaplotnik, R., Aguiam, D., Aho-Mantila, L., Angioni, C., Arden, N., Parra, R. Arredondo, Asunta, O., de Baar, M., Balden, M., Behler, K., Bergmann, A., Bernardo, J., Bernert, M., Beurskens, M., Biancalani, A., Bilato, R., Birkenmeier, G., Bobkov, V., Bock, A., Bogomolov, A., Bolzonella, T., Boswirth, B., Bottereau, C., Bottino, A., van den Brand, H., Brezinsek, S., Brida, D., Brochard, F., Bruhn, C., Buchanan, J., Buhler, A., Burckhart, A., Cambon-Silva, D., Camenen, Y., Carvalho, P., Carrasco, G., Cazzaniga, C., Carr, M., Carralero, D., Casali, L., Castaldo, C., Cavedon, M., Challis, C., Chankin, A., Chapman, I., Clairet, F., Classen, I., Coda, S., Coelho, R., Coenen, J. W., Colas, L., Conway, G., Costea, S., Coster, D. P., Croci, G., Cseh, G., Czarnecka, A., D'Arcangelo, O., Day, C., Delogu, R., de Marne, P., Denk, S., Denner, P., Dibon, M., D'Inca, R., Di Siena, A., Douai, D., Drube, R., Dunne, M., Duval, B. P., Dux, R., Eich, T., Elgeti, S., Engelhardt, K., Erdos, B., Erofeev, I., Esposito, B., Fable, E., Faitsch, M., Fantz, U., Faugel, H., Felici, F., Fietz, S., Figueredo, A., Fischer, R., Ford, O., Frassinetti, L., Freethy, S., Froeschle, M., Fuchert, G., Fuchs, J. C., Fuenfgelder, H., Galazka, K., Galdon-Quiroga, J., Gallo, A., Gao, Y., Garavaglia, S., Garcia-Munoz, M., Geiger, B., Cianfarani, C., Giannone, L., Giovannozzi, E., Gleason-Gonzalez, C., Gloeggler, S., Gobbin, M., Goerler, T., Goodman, T., Gorini, G., Gradic, D., Graeter, A., Granucci, G., Greuner, H., Griener, M., Groth, M., Gude, A., Guenter, S., Guimarais, L., Haas, G., Hakola, A. H., Ham, C., Happel, T., Harrison, J., Hatch, D., Hauer, V., Hayward, T., Heinemann, B., Heinzel, S., Hellsten, T., Henderson, S., Hennequin, P., Herrmann, A., Heyn, E., Hitzler, F., Hobirk, J., Hoelzl, M., Hoeschen, T., Holm, J. H., Hopf, C., Hoppe, F., Horvath, L., Houben, A., Huber, A., Igochine, V., Ilkei, T., Ivanova-Stanik, I., Jacob, W., Jacobsen, A. S., Jacquot, J., Janky, F., Jardin, A., Jaulmes, F., Jenko, F., Jensen, T., Joffrin, E., Kaesemann, C., Kallenbach, A., Kalvin, S., Kantor, M., Kappatou, A., Kardaun, O., Karhunen, J., Kasilov, S., Kernbichler, W., Kim, D., Kimmig, S., Kirk, A., Klingshirn, H. -J., Koch, F., Kocsis, G., Koehn, A., Kraus, M., Krieger, K., Krivska, A., Kraemer-Flecken, A., Kurki-Suonio, T., Kurzan, B., Lackner, K., Laggner, F., Lang, P. T., Lauber, P., Lazanyi, N., Lazaros, A., Lebschy, A., Li, L., Li, M., Liang, Y., Lipschultz, B., Liu, Y., Lohs, A., Luhmann, N. C., Lunt, T., Lyssoivan, A., Madsen, J., Maier, H., Maj, O., Mailloux, J., Maljaars, E., Manas, P., Mancini, A., Manhard, A., Manso, M. -E., Mantica, P., Mantsinen, M., Manz, P., Maraschek, M., Martens, C., Martin, P., Marrelli, L., Martitsch, A., Mastrostefano, S., Mayer, A., Mayer, M., Mazon, D., McCarthy, P. J., Meister, H., Medvedeva, A., Merkel, P., Merkel, R., Merle, A., Mertens, V., Meshcheriakov, D., Meyer, H., Meyer, O., Miettunen, J., Milanesio, D., Mink, F., Mlynek, A., Monaco, F., Moon, C., Nazikian, R., Nemes-Czopf, A., Neu, G., Nielsen, A. H., Nielsen, S. K., Nikolaeva, V., Nocente, M., Noterdaeme, J. -M., Nowak, S., Oberparleiter, M., Ochoukov, R., Odstrcil, T., Olsen, J., Orain, F., Palermo, F., Papp, G., Perez, I. Paradela, Pautasso, G., Enzel, F., Petersson, P., Pinzon, J., Piovesan, P., Piron, C., Plaum, B., Ploeckl, B., Plyusnin, V., Pokol, G., Poli, E., Porte, L., Potzel, S., Prisiazhniuk, D., Ramisch, M., Rapson, C., Rasmussen, J., Raupp, G., Refy, D., Reich, M., Reimold, F., Ribeiro, T., Riedl, R., Rittich, D., Rocchi, G., Rodriguez-Ramos, M., Ross, A., Rott, M., Rubel, M., Ryan, D., Ryter, F., Saarelma, S., Salewski, M., Salmi, A., Sanchis-Sanchez, L., Santos, G., Santos, J., Sauter, O., Scarabosio, A., Schall, G., Schmid, K., Schmitz, O., Schneider, P. A., Schneller, M., Schrittwieser, R., Schubert, M., Schwarz-Selinger, T., Schweinzer, J., Scott, B., Sehmer, T., Sertoli, M., Shabbir, A., Shalpegin, A., Shao, L., Sharapov, S., Siccinio, M., Sieglin, B., Sigalov, A., Silva, A., Silva, C., Simon, P., Simpson, J., Snicker, A., Sommariva, C., Sozzi, C., Spolaore, M., Stejner, M., Stober, J., Stobbe, F., Stroth, U., Strumberger, E., Suarez, G., Sugiyama, K., Sun, H. -J., Suttrop, W., Szepesi, T., Tal, B., Tala, T., Tardini, G., Tardocchi, M., Terranova, D., Tierens, W., Told, D., Tudisco, O., Trevisan, G., Treutterer, W., Trier, E., Tripsky, M., Valisa, M., Valovic, M., Vanovac, B., Varela, P., Varoutis, S., Verdoolaege, G., Vezinet, D., Vianello, N., Vicente, J., Vierle, T., Viezzer, E., von Toussaint, U., Wagner, D., Wang, N., Wang, X., Weidl, M., Weiland, M., White, A. E., Willensdorfer, M., Wiringer, B., Wischmeier, M., Wolf, R., Wolfrum, E., Xiang, L., Yang, Q., Yang, Z., Yu, Q., Zagorski, R., Zammuto, I., Zarzoso, D., Zhang, W., van Zeeland, M., Zehetbauer, T., Zilker, M., Zoletnik, S., and Zohm, H.
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nitrogen seeding ,residual gas analysis ,asdex upgrade ,n-2-h-2 flowing discharges ,plasma-surface interaction ,consistent kinetic-model ,ammonia ,mass spectrometry - Abstract
Ammonia formation was studied in a series of dedicated nitrogen seeded H-mode discharges at ASDEX Upgrade. The evolution of ammonia formation was investigated with a reference phase before the seeding, and a long, stable flat-top nitrogen-seeded phase. It was monitored with divertor spectroscopy and analysis of the exhaust gas. The amount of the detected ammonia increased continuously over the course of five discharges with the same nitrogen seeding rate. The same trend was observed in the nitrogen density in the core plasma, as measured by charge exchange recombination spectroscopy and other signals, linked to the effects of nitrogen seeding. The results show that the rate of ammonia formation exhibited the same trend as the nitrogen density in the plasma. This density, in turn, was strongly influenced by the nitrogen wall inventory. The spatial distribution of the detected ammonia suggests that a significant contribution to the net ammonia formation is made in plasma-shaded areas, through surface reactions of neutral species.
100. Validation of the ICRF antenna coupling code RAPLICASOL against TOPICA and experiments
- Author
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Tierens, W., Milanesio, D., Urbanczyk, G., Helou, W., Bobkov, V, Noterdaeme, J-M, Colas, L., Maggiora, R., Aguiam, D., Aho-Mantila, L., Angioni, C., Arden, N., Parra, R. Arredondo, Asunta, O., de Baar, M., Balden, M., Behler, K., Bergmann, A., Bernardo, J., Bernert, M., Beurskens, M., Biancalani, A., Bilato, R., Birkenmeier, G., Bock, A., Bogomolov, A., Bolzonella, T., Boeswirth, B., Bottereau, C., Bottino, A., van den Brand, H., Brezinsek, S., Brida, D., Brochard, F., Bruhn, C., Buchanan, J., Buhler, A., Burckhart, A., Cambon-Silva, D., Camenen, Y., Carvalho, P., Carrasco, G., Cazzaniga, C., Carr, M., Carralero, D., Casali, L., Castaldo, C., Cavedon, M., Challis, C., Chankin, A., Chapman, I, Clairet, F., Classen, I, Coda, S., Coelho, R., Coenen, J. W., Conway, G., Costea, S., Coster, D. P., Croci, G., Cseh, G., Czarnecka, A., D'Arcangelo, O., Day, C., Delogu, R., de Marne, P., Denk, S., Denner, P., Dibon, M., D'Inca, R., Di Siena, A., Douai, D., Drenik, A., Drube, R., Dunne, M., Duval, B. P., Dux, R., Eich, T., Elgeti, S., Engelhardt, K., Erdos, B., Erofeev, I, Esposito, B., Fable, E., Faitsch, M., Fantz, U., Faugel, H., Felici, F., Fietz, S., Figueredo, A., Fischer, R., Ford, O., Frassinetti, L., Freethy, S., Froeschle, M., Fuchert, G., Fuchs, J. C., Fuenfgelder, H., Galazka, K., Galdon-Quiroga, J., Gallo, A., Gao, Y., Garavaglia, S., Garcia-Munoz, M., Geiger, B., Cianfarani, C., Giannone, L., Giovannozzi, E., Gleason-Gonzalez, C., Gloeggler, S., Gobbin, M., Goerler, T., Goodman, T., Gorini, G., Gradic, D., Graeter, A., Granucci, G., Greuner, H., Griener, M., Groth, M., Gude, A., Guenter, S., Guimarais, L., Haas, G., Hakola, A. H., Ham, C., Happel, T., Harrison, J., Hatch, D., Hauer, V, Hayward, T., Heinemann, B., Heinzel, S., Hellsten, T., Henderson, S., Hennequin, P., Herrmann, A., Heyn, E., Hitzler, F., Hobirk, J., Hoelzl, M., Hoeschen, T., Holm, J. H., Hopf, C., Hoppe, F., Horvath, L., Houben, A., Huber, A., Igochine, V, Ilkei, T., Ivanova-Stanik, I., Jacob, W., Jacobsen, A. S., Jacquot, J., Janky, F., Jardin, A., Jaulmes, F., Jenko, F., Jensen, T., Joffrin, E., Kaesemann, C., Kallenbach, A., Kalvin, S., Kantor, M., Kappatou, A., Kardaun, O., Karhunen, J., Kasilov, S., Kernbichler, W., Kim, D., Kimmig, S., Kirk, A., Klingshirn, H-J, Koch, F., Kocsis, G., Koehn, A., Kraus, M., Krieger, K., Krivska, A., Kraemer-Flecken, A., Kurki-Suonio, T., Kurzan, B., Lackner, K., Laggner, F., Lang, P. T., Lauber, P., Lazanyi, N., Lazaros, A., Lebschy, A., Li, L., Li, M., Liang, Y., Lipschultz, B., Liu, Y., Lohs, A., Luhmann, N. C., Lunt, T., Lyssoivan, A., Madsen, J., Maier, H., Maj, O., Mailloux, J., Maljaars, E., Manas, P., Mancini, A., Manhard, A., Manso, M-E, Mantica, P., Mantsinen, M., Manz, P., Maraschek, M., Martens, C., Martin, P., Marrelli, L., Martitsch, A., Mastrostefano, S., Mayer, A., Mayer, M., Mazon, D., McCarthy, P. J., McDermott, R., Meisl, G., Meister, H., Medvedeva, A., Merkel, P., Merkel, R., Merle, A., Mertens, V, Meshcheriakov, D., Meyer, H., Meyer, O., Miettunen, J., Mink, F., Mlynek, A., Monaco, F., Moon, C., Nazikian, R., Nemes-Czopf, A., Neu, G., Neu, R., Nielsen, A. H., Nielsen, S. K., Nikolaeva, V, Nocente, M., Nowak, S., Oberkofler, M., Oberparleiter, M., Ochoukov, R., Odstrcil, T., Olsen, J., Orain, F., Palermo, F., Papp, G., Perez, I. Paradela, Pautasso, G., Enzel, F., Petersson, P., Pinzon, J., Piovesan, P., Piron, C., Plaum, B., Ploeckl, B., Plyusnin, V, Pokol, G., Poli, E., Porte, L., Potzel, S., Prisiazhniuk, D., Puetterich, T., Ramisch, M., Rapson, C., Rasmussen, J., Raupp, G., Refy, D., Reich, M., Reimold, F., Ribeiro, T., Riedl, R., Rittich, D., Rocchi, G., Rodriguez-Ramos, M., Rohde, V, Ross, A., Rott, M., Rubel, M., Ryan, D., Ryter, F., Saarelma, S., Salewski, M., Salmi, A., Sanchis-Sanchez, L., Santos, G., Santos, J., Sauter, O., Scarabosio, A., Schall, G., Schmid, K., Schmitz, O., Schneider, P. A., Schneller, M., Schrittwieser, R., Schubert, M., Schwarz-Selinger, T., Schweinzer, J., Scott, B., Sehmer, T., Sertoli, M., Shabbir, A., Shalpegin, A., Shao, L., Sharapov, S., Siccinio, M., Sieglin, B., Sigalov, A., Silva, A., Silva, C., Simon, P., Simpson, J., Snicker, A., Sommariva, C., Sozzi, C., Spolaore, M., Stejner, M., Stober, J., Stobbe, F., Stroth, U., Strumberger, E., Suarez, G., Sugiyama, K., Sun, H-J, Suttrop, W., Szepesi, T., Tal, B., Tala, T., Tardini, G., Tardocchi, M., Terranova, D., Told, D., Tudisco, O., Trevisan, G., Treutterer, W., Trier, E., Tripsky, M., Valisa, M., Valovic, M., Vanovac, B., Varela, P., Varoutis, S., Verdoolaege, G., Vezinet, D., Vianello, N., Vicente, J., Vierle, T., Viezzer, E., von Toussaint, U., Wagner, D., Wang, N., Wang, X., Weidl, M., Weiland, M., White, A. E., Willensdorfer, M., Wiringer, B., Wischmeier, M., Wolf, R., Wolfrum, E., Xiang, L., Yang, Q., Yang, Z., Yu, Q., Zagorski, R., Zammuto, I, Zarzoso, D., Zhang, W., van Zeeland, M., Zehetbauer, T., Zilker, M., Zoletnik, S., Zohm, H., Hakola, A., Adamek, J., Agostini, M., Ahn, J., Akers, R., Albanese, R., Aledda, R., Alessi, E., Allan, S., Alves, D., Ambrosino, R., Amicucci, L., Anand, H., Anastassiou, G., Andrebe, Y., Apruzzese, G., Ariola, M., Arnichand, H., Arter, W., Baciero, A., Barnes, M., Barrera, L., Behn, R., Bencze, A., Bettini, P., Bilkova, P., Bin, W., Bizarro, J. P. S., Blanchard, P., Blanken, T., Bluteau, M., Bogar, O., Bohm, P., Boncagni, L., Botrugno, A., Bouquey, F., Bourdelle, C., Bremond, S., Bufferand, H., Buratti, P., Cahyna, P., Calabro, G., Caniello, R., Cannas, B., Canton, A., Cardinali, A., Carnevale, D., Castejon, F., Castro, R., Causa, F., Cavazzana, R., Cecconello, M., Ceccuzzi, S., Cesario, R., Challis, C. D., Chapman, I. T., Chapman, S., Chernyshova, M., Choi, D., Ciraolo, G., Citrin, J., Corre, Y., Crisanti, F., Cruz, N., De Angeli, M., De Masi, G., De Temmerman, G., De Tommasi, G., Decker, J., Delogu, R. S., Dendy, R., Di Troia, C., Dimitrova, M., Doric, V, Dudson, B., Dunai, D., Easy, L., Elmore, S., Fanni, A., Fedorczak, N., Ferreira, J., Fevrier, O., Ficker, O., Figini, L., Figueiredo, A., Fil, A., Fishpool, G., Fitzgerald, M., Fontana, M., Fridstrom, R., Frigione, D., Fuchs, C., Palumbo, M. Furno, Futatani, S., Gabellieri, L., Galeani, S., Gallart, D., Galperti, C., Garcia, J., Garcia-Carrasco, A., Garcia-Lopez, J., Gardarein, J-L, Garzotti, L., Gaspar, J., Gauthier, E., Geelen, P., Ghendrih, P., Ghezzi, F., Giacomelli, L., Giroud, C., Gonzalez, C. Gleason, Goodman, T. P., Gospodarczyk, M., Gruber, M., Guirlet, R., Gunn, J., Hacek, P., Hacquin, S., Hall, S., Harting, D., Havlickova, E., Heyn, M., Hnat, B., Holzl, M., Hogeweij, D., Honore, C., Horacek, J., Hornung, G., Huang, Z., Igitkhanov, J., Imrisek, M., Innocente, P., Ionita-Schrittwieser, C., Isliker, H., Jacquet, P., Jakubowski, M., Busk, O. Jeppe Miki, Jessen, M., Jones, O., Jonsson, T., Kallinikos, N., Karpushov, A., Kasprowicz, G., Kendl, A., Kjer, S., Klimek, I, Kogut, D., Komm, M., Korsholm, S. B., Koslowski, H. R., Koubiti, M., Kovacic, J., Kovarik, K., Krawczyk, N., Krbec, J., Kube, R., Kudlacek, O., Labit, B., Laggner, F. M., Laguardia, L., Lahtinen, A., Lalousis, P., Lang, P., Le, H. B., Leddy, J., Lefevre, L., Lehnen, M., Leipold, F., Lessig, A., Leyland, M., Liu, Y. Q., Loarer, T., Loarte, A., Loewenhoff, T., Lomanowski, B., Loschiavo, V. P., Lupelli, I, Lux, H., Maget, P., Maggi, C., Magnussen, M. L., Maljaars, B., Malygin, A., Marchand, B., Marconato, N., Marini, C., Marinucci, M., Markovic, T., Marocco, D., Martin, Y., Martin Solis, J. R., Mattei, M., Matthews, G., Mavridis, M., Mayoral, M-L, McCarthy, P., McAdams, R., McArdle, G., McClements, K., McMillan, B., Militello, F., Miron, I. G., Mitosinkova, K., Mlynar, J., Molina, D., Molina, P., Monakhov, I, Morales, J., Moreau, D., Morel, P., Moret, J-M, Moro, A., Moulton, D., Mueller, H. W., Nabais, F., Nardon, E., Naulin, V, Nespoli, F., Nimb, S., Nouailletas, R., Omotani, J., O'Mullane, M. G., Osterman, N., Paccagnella, R., Pamela, S., Pangione, L., Panjan, M., Paprok, R., Parail, V, Parra, F. I., Pau, A., Pehkonen, S-P, Pereira, A., Cippo, E. Perelli, Ridolfini, V. Pericoli, Peterka, M., Petrzilka, V, Pironti, A., Pisano, F., Pisokas, T., Pitts, R., Ploumistakis, I, Poljak, D., Poloskei, P., Popovic, Z., Por, G., Predebon, I, Preynas, M., Primc, G., Pucella, G., Puiatti, M. E., Rack, M., Ramogida, G., Rasmussen, J. Juul, Ratta, G. A., Ratynskaia, S., Ravera, G., Reimerdes, H., Reinke, M., Reiser, D., Resnik, M., Reux, C., Ripamonti, D., Riva, G., Rosato, J., Sabot, R., Saint-Laurent, F., Samaddar, D., Scannell, R., Scheffer, M., Schneider, M., Schneider, B., Schneider, P., Seidl, J., Sesnic, S., Shanahan, B., Sheikh, U., Sias, G., Fuglister, M. Silva, Spagnolo, S., Spizzo, G., Stange, T., Pedersen, M. Stejner, Stepanov, I, Strand, P., Susnjara, A., Tamain, P., Teplukhina, A., Testa, D., Theiler, C., Thornton, A., Tolias, P., Tophoj, L., Trevisan, G. L., Tsironis, C., Tsui, C., Uccello, A., Urban, J., Vallejos, P., Vartanian, S., Vega, J., Verhaegh, K., Vermare, L., Vignitchouk, L., Vijvers, W. A. J., Villone, F., Viola, B., Vlahos, L., Voitsekhovitch, I, Vondracek, P., Vu, N. M. T., Walkden, N., Wauters, T., Weinzettl, V, Westerhof, E., Wiesenberger, M., Wodniak, I, Yadykin, D., Zanca, P., Zaplotnik, R., Zestanakis, P., and Zuin, M.
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icrf ,design ,finite elements ,simulation - Abstract
In this paper we validate the finite element code RAPLICASOL, which models radiofrequency wave propagation in edge plasmas near ICRF antennas, against calculations with the TOPICA code. We compare the output of both codes for the ASDEX Upgrade 2-strap antenna, and for a 4-strap WEST-like antenna. Although RAPLICASOL requires considerably fewer computational resources than TOPICA, we find that the predicted quantities of experimental interest (including reflection coefficients, coupling resistances, S- and Z-matrix entries, optimal matching settings, and even radiofrequency electric fields) are in good agreement provided we are careful to use the same geometry in both codes.
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