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12 results on '"Pompon, F"'

1. Low Level Radio-Frequency system used for testing the RFQ prototype of MYRRHA

Author

Joly, C., Sarlin, W., Gargouri, Y., Lesrel, J., Yaniche, J-F., Berthelot, S., Escalda, A., Ferry, G., Ky, B-Y., Pereira, M., Belmans, J., Davin, F., De Cock, W., Della Faille, P., Pompon, F., and Vandeplassche, D.

Subjects
Physics - Accelerator Physics, Physics - Instrumentation and Detectors
Abstract

Within the framework of the European, project MYRTE (MYRRHA Research and Transmutation Endeavour) of the H2020 program, a 4-Rods RFQ (Radio Frequency Quadrupole) has been designed at 176.1 MHz RFQ for accelerating up to 4 mA protons in CW (Continuous Wave) operation from 30 keV up to 1.5 MeV. A LLRF prototype has been developed to regulate the amplitude and the phase of the accelerator field into the RFQ and the frequency of the RFQ controlling the motor of the frequency tuner. The facility at Louvain-La-Neuve will be presented with a focus on the LLRF system used and some preliminary results., Comment: Poster presented at LLRF Workshop 2019 (LLRF2019, arXiv:1909.06754)

Published
2019

2. Recent ASDEX Upgrade research in support of ITER and DEMO

Author

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

Subjects
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)

Published
2015
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3. Overview of ASDEX Upgrade results

Author

Stroth, U, Adamek, J, Aho Mantila, L, Akaslompolo, S, Amdor, C, Angioni, C, Balden, M, Bardin, S, Orte, L, Behler, K, Belonohy, E, Bergmann, A, Bernert, M, Bilato, R, Birkenmeier, G, Bobkov, V, Boom, J, Bottereau, C, Bottino, A, Braun, F, Brezinsek, S, Brochard, T, Bruedgam, M, Buhler, A, Burckhart, A, Casson, F, Chankin, A, Chapman, I, Clairet, F, Classen, I, Coenen, J, Conway, G, Coster, D, Curran, D, da Silva, F, de Marne, P, D'Inca, R, Douai, D, Drube, R, Dunne, M, Dux, R, Eich, T, Eixenberger, H, Endstrasser, N, Engelhardt, K, Esposito, B, Fable, E, Fischer, R, Fuenfgelder, H, Fuchs, J, Gal, K, Munoz, M, Geiger, B, Giannone, L, Goerler, T, da Graca, S, Greuner, H, Gruber, O, Gude, A, Guimarais, L, Guenter, S, Haas, G, Hakola, A, Hangan, D, Happel, T, Haertl, T, Hauff, T, Heinemann, B, Herrmann, A, Hobirk, J, Hoehnle, H, Hoelzl, M, Hopf, C, Houben, A, Igochine, V, Ionita, C, Janzer, A, Jenko, F, Kantor, M, Kaesemann, C, Kallenbach, A, Kalvin, S, Kappatou, A, Kardaun, O, Kasparek, W, Kaufmann, M, Kirk, A, Klingshirn, H, Kocan, M, Kocsis, G, Konz, C, Koslowski, R, Krieger, K, Kubic, M, Kurki Suonio, T, Kurzan, B, Lackner, K, Lang, P, Lauber, P, Laux, M, Lazaros, A, Leipold, F, Leuterer, F, Lindig, S, Lisgo, S, Lohs, A, Lunt, T, Maier, H, Makkonen, T, Mank, K, Manso, M, Maraschek, M, Mayer, M, Mccarthy, P, Mcdermott, R, Mehlmann, F, Meister, H, Menchero, L, Meo, F, Merkel, P, Merkel, R, Mertens, V, Merz, F, Mlynek, A, Monaco, F, Mueller, S, Mueller, H, Muenich, M, Neu, G, Neu, R, Neuwirth, D, Nocente, M, Nold, B, Noterdaeme, J, Pautasso, G, Pereverzev, G, Ploeckl, B, Podoba, Y, Pompon, F, Poli, E, Polozhiy, K, Potzel, S, Pueschel, M, Puetterich, T, Rathgeber, S, Raupp, G, Reich, M, Reimold, F, Ribeiro, T, Riedl, R, Rohde, V, Rooij, G, Roth, J, Rott, M, Ryter, F, Salewski, M, Santos, J, Sauter, P, Scarabosio, A, Schall, G, Schmid, K, Schneider, P, Schneider, W, Schrittwieser, R, Schubert, M, Schweinzer, J, Scott, B, Sempf, M, Sertoli, M, Siccinio, M, Sieglin, B, Sigalov, A, Silva, A, Sommer, F, Staebler, A, Stober, J, Streibl, B, Strumberger, E, Sugiyama, K, Suttrop, W, Tala, T, Tardini, G, Teschke, M, Tichmann, C, Told, D, Treutterer, W, Tsalas, M, Van Zeeland, M, Varela, P, Veres, G, Vicente, J, Vianello, N, Vierle, T, Viezzer, E, Viola, B, Vorpahl, C, Wachowski, M, Wagner, D, Wauters, T, Weller, A, Wenninger, R, Wieland, B, Willensdorfer, M, Wischmeier, M, Wolfrum, E, Wuersching, E, Yu, Q, Zammuto, I, Zasche, D, Zehetbauer, T, Zhang, Y, Zilker, M, Zohm, H, McCarthy, P, McDermott, R, Zohm, H., NOCENTE, MASSIMO, Stroth, U, Adamek, J, Aho Mantila, L, Akaslompolo, S, Amdor, C, Angioni, C, Balden, M, Bardin, S, Orte, L, Behler, K, Belonohy, E, Bergmann, A, Bernert, M, Bilato, R, Birkenmeier, G, Bobkov, V, Boom, J, Bottereau, C, Bottino, A, Braun, F, Brezinsek, S, Brochard, T, Bruedgam, M, Buhler, A, Burckhart, A, Casson, F, Chankin, A, Chapman, I, Clairet, F, Classen, I, Coenen, J, Conway, G, Coster, D, Curran, D, da Silva, F, de Marne, P, D'Inca, R, Douai, D, Drube, R, Dunne, M, Dux, R, Eich, T, Eixenberger, H, Endstrasser, N, Engelhardt, K, Esposito, B, Fable, E, Fischer, R, Fuenfgelder, H, Fuchs, J, Gal, K, Munoz, M, Geiger, B, Giannone, L, Goerler, T, da Graca, S, Greuner, H, Gruber, O, Gude, A, Guimarais, L, Guenter, S, Haas, G, Hakola, A, Hangan, D, Happel, T, Haertl, T, Hauff, T, Heinemann, B, Herrmann, A, Hobirk, J, Hoehnle, H, Hoelzl, M, Hopf, C, Houben, A, Igochine, V, Ionita, C, Janzer, A, Jenko, F, Kantor, M, Kaesemann, C, Kallenbach, A, Kalvin, S, Kappatou, A, Kardaun, O, Kasparek, W, Kaufmann, M, Kirk, A, Klingshirn, H, Kocan, M, Kocsis, G, Konz, C, Koslowski, R, Krieger, K, Kubic, M, Kurki Suonio, T, Kurzan, B, Lackner, K, Lang, P, Lauber, P, Laux, M, Lazaros, A, Leipold, F, Leuterer, F, Lindig, S, Lisgo, S, Lohs, A, Lunt, T, Maier, H, Makkonen, T, Mank, K, Manso, M, Maraschek, M, Mayer, M, Mccarthy, P, Mcdermott, R, Mehlmann, F, Meister, H, Menchero, L, Meo, F, Merkel, P, Merkel, R, Mertens, V, Merz, F, Mlynek, A, Monaco, F, Mueller, S, Mueller, H, Muenich, M, Neu, G, Neu, R, Neuwirth, D, Nocente, M, Nold, B, Noterdaeme, J, Pautasso, G, Pereverzev, G, Ploeckl, B, Podoba, Y, Pompon, F, Poli, E, Polozhiy, K, Potzel, S, Pueschel, M, Puetterich, T, Rathgeber, S, Raupp, G, Reich, M, Reimold, F, Ribeiro, T, Riedl, R, Rohde, V, Rooij, G, Roth, J, Rott, M, Ryter, F, Salewski, M, Santos, J, Sauter, P, Scarabosio, A, Schall, G, Schmid, K, Schneider, P, Schneider, W, Schrittwieser, R, Schubert, M, Schweinzer, J, Scott, B, Sempf, M, Sertoli, M, Siccinio, M, Sieglin, B, Sigalov, A, Silva, A, Sommer, F, Staebler, A, Stober, J, Streibl, B, Strumberger, E, Sugiyama, K, Suttrop, W, Tala, T, Tardini, G, Teschke, M, Tichmann, C, Told, D, Treutterer, W, Tsalas, M, Van Zeeland, M, Varela, P, Veres, G, Vicente, J, Vianello, N, Vierle, T, Viezzer, E, Viola, B, Vorpahl, C, Wachowski, M, Wagner, D, Wauters, T, Weller, A, Wenninger, R, Wieland, B, Willensdorfer, M, Wischmeier, M, Wolfrum, E, Wuersching, E, Yu, Q, Zammuto, I, Zasche, D, Zehetbauer, T, Zhang, Y, Zilker, M, Zohm, H, McCarthy, P, McDermott, R, Zohm, H., and NOCENTE, MASSIMO

Abstract

The medium size divertor tokamak ASDEX Upgrade (major and minor radii 1.65 m and 0.5 m, respectively, magnetic-field strength 2.5 T) possesses flexible shaping and versatile heating and current drive systems. Recently the technical capabilities were extended by increasing the electron cyclotron resonance heating (ECRH) power, by installing 2 × 8 internal magnetic perturbation coils, and by improving the ion cyclotron range of frequency compatibility with the tungsten wall. With the perturbation coils, reliable suppression of large type-I edge localized modes (ELMs) could be demonstrated in a wide operational window, which opens up above a critical plasma pedestal density. The pellet fuelling efficiency was observed to increase which gives access to H-mode discharges with peaked density profiles at line densities clearly exceeding the empirical Greenwald limit. Owing to the increased ECRH power of 4 MW, H-mode discharges could be studied in regimes with dominant electron heating and low plasma rotation velocities, i.e. under conditions particularly relevant for ITER. The ion-pressure gradient and the neoclassical radial electric field emerge as key parameters for the transition. Using the total simultaneously available heating power of 23 MW, high performance discharges have been carried out where feed-back controlled radiative cooling in the core and the divertor allowed the divertor peak power loads to be maintained below 5 MW m -2. Under attached divertor conditions, a multi-device scaling expression for the power-decay length was obtained which is independent of major radius and decreases with magnetic field resulting in a decay length of 1 mm for ITER. At higher densities and under partially detached conditions, however, a broadening of the decay length is observed. In discharges with density ramps up to the density limit, the divertor plasma shows a complex behaviour with a localized high-density region in the inner divertor before the outer divertor detaches.

Published
2013

4. Overview of ASDEX Upgrade results

Author

Kallenbach, A., Adamek, J., Aho-Mantila, L., Äkäslompolo, S., Angioni, C., Atanasiu, C.V., Balden, M., Behler, K., Belonohy, E., Bergmann, A., Bernert, M., Bilato, R., Bobkov, V., Boom, J., Bottino, A., Braun, F., Brüdgam, M., Buhler, A., Burckhart, A., Chankin, A., Classen, I.G.J., Conway, G.D., Coster, D.P., de Marné, P., D'Inca, R., Drube, R., Dux, R., Eich, T., Endstrasser, N., Engelhardt, K., Esposito, B., Fable, E., Fahrbach, H.-U., Fattorini, L., Fischer, R., Flaws, A., Fünfgelder, H., Fuchs, J.C., Gál, K., García Muñoz, M., Geiger, B., Gemisic Adamov, M., Giannone, L., Giroud, C., Görler, T., da Graca, S., Greuner, H., Gruber, O., Gude, A., Günter, S., Haas, G., Hakola, A.H., Hangan, D., Happel, T., Hauff, T., Heinemann, B., Herrmann, A., Hicks, N., Hobirk, J., Höhnle, H., Hölzl, M., Hopf, C., Horton, L., Huart, M., Igochine, V., Ionita, C., Janzer, A., Jenko, F., Käsemann, C.-P., Kálvin, S., Kardaun, O., Kaufmann, M., Kirk, A., Klingshirn, H.-J., Kocan, M., Kocsis, G., Kollotzek, H., Konz, C., Koslowski, R., Krieger, K., Kurki-Suonio, T., Kurzan, B., Lackner, K., Lang, P.T., Lauber, P., Laux, M., Leipold, Frank, Leuterer, F., Lohs, A., Luhmann, N.C., Jr, Lunt, T., Lyssoivan, A., Maier, H., Maggi, C., Mank, K., Manso, M.-E., Maraschek, M., Martin, P., Mayer, M., McCarthy, P.J., McDermott, R., Meister, H., Menchero, L., Meo, Fernando, Merkel, P., Merkel, R., Mertens, V., Merz, F., Mlynek, A., Monaco, F., Müller, H.W., Münich, M., Murmann, H., Neu, G., Neu, R., Nold, B., Noterdaeme, J.-M., Park, H.K., Pautasso, G., Pereverzev, G., Podoba, Y., Pompon, F., Poli, E., Polochiy, K., Potzel, S., Prechtl, M., Püschel, M.J., Pütterich, T., Rathgeber, S.K., Raupp, G., Reich, M., Reiter, B., Ribeiro, T., Riedl, R., Rohde, V., Roth, J., Rott, M., Ryter, F., Sandmann, W., Santos, J., Sassenberg, K., Sauter, P., Scarabosio, A., Schall, G., Schmid, K., Schneider, P.A., Schneider, W., Schramm, G., Schrittwieser, R., Schweinzer, J., Scott, B., Sempf, M., Serra, F., Sertoli, M., Siccinio, M., Sigalov, A., Silva, A., Sips, A.C.C., Sommer, F., Stäbler, A., Stober, J., Streibl, B., Strumberger, E., Sugiyama, K., Suttrop, W., Szepesi, T., Tardini, G., Tichmann, C., Told, D., Treutterer, W., Urso, L., Varela, P., Vincente, J., Vianello, N., Vierle, T., Viezzer, E., Vorpahl, C., Wagner, D., Weller, A., Wenninger, R., Wieland, B., Wigger, C., Willensdorfer, M., Wischmeier, M., Wolfrum, E., Würsching, E., Yadikin, D., Yu, Q., Zammuto, I., Zasche, D., Zehetbauer, T., Zhang, Y., Zilker, M., Zohm, H., Kallenbach, A., Adamek, J., Aho-Mantila, L., Äkäslompolo, S., Angioni, C., Atanasiu, C.V., Balden, M., Behler, K., Belonohy, E., Bergmann, A., Bernert, M., Bilato, R., Bobkov, V., Boom, J., Bottino, A., Braun, F., Brüdgam, M., Buhler, A., Burckhart, A., Chankin, A., Classen, I.G.J., Conway, G.D., Coster, D.P., de Marné, P., D'Inca, R., Drube, R., Dux, R., Eich, T., Endstrasser, N., Engelhardt, K., Esposito, B., Fable, E., Fahrbach, H.-U., Fattorini, L., Fischer, R., Flaws, A., Fünfgelder, H., Fuchs, J.C., Gál, K., García Muñoz, M., Geiger, B., Gemisic Adamov, M., Giannone, L., Giroud, C., Görler, T., da Graca, S., Greuner, H., Gruber, O., Gude, A., Günter, S., Haas, G., Hakola, A.H., Hangan, D., Happel, T., Hauff, T., Heinemann, B., Herrmann, A., Hicks, N., Hobirk, J., Höhnle, H., Hölzl, M., Hopf, C., Horton, L., Huart, M., Igochine, V., Ionita, C., Janzer, A., Jenko, F., Käsemann, C.-P., Kálvin, S., Kardaun, O., Kaufmann, M., Kirk, A., Klingshirn, H.-J., Kocan, M., Kocsis, G., Kollotzek, H., Konz, C., Koslowski, R., Krieger, K., Kurki-Suonio, T., Kurzan, B., Lackner, K., Lang, P.T., Lauber, P., Laux, M., Leipold, Frank, Leuterer, F., Lohs, A., Luhmann, N.C., Jr, Lunt, T., Lyssoivan, A., Maier, H., Maggi, C., Mank, K., Manso, M.-E., Maraschek, M., Martin, P., Mayer, M., McCarthy, P.J., McDermott, R., Meister, H., Menchero, L., Meo, Fernando, Merkel, P., Merkel, R., Mertens, V., Merz, F., Mlynek, A., Monaco, F., Müller, H.W., Münich, M., Murmann, H., Neu, G., Neu, R., Nold, B., Noterdaeme, J.-M., Park, H.K., Pautasso, G., Pereverzev, G., Podoba, Y., Pompon, F., Poli, E., Polochiy, K., Potzel, S., Prechtl, M., Püschel, M.J., Pütterich, T., Rathgeber, S.K., Raupp, G., Reich, M., Reiter, B., Ribeiro, T., Riedl, R., Rohde, V., Roth, J., Rott, M., Ryter, F., Sandmann, W., Santos, J., Sassenberg, K., Sauter, P., Scarabosio, A., Schall, G., Schmid, K., Schneider, P.A., Schneider, W., Schramm, G., Schrittwieser, R., Schweinzer, J., Scott, B., Sempf, M., Serra, F., Sertoli, M., Siccinio, M., Sigalov, A., Silva, A., Sips, A.C.C., Sommer, F., Stäbler, A., Stober, J., Streibl, B., Strumberger, E., Sugiyama, K., Suttrop, W., Szepesi, T., Tardini, G., Tichmann, C., Told, D., Treutterer, W., Urso, L., Varela, P., Vincente, J., Vianello, N., Vierle, T., Viezzer, E., Vorpahl, C., Wagner, D., Weller, A., Wenninger, R., Wieland, B., Wigger, C., Willensdorfer, M., Wischmeier, M., Wolfrum, E., Würsching, E., Yadikin, D., Yu, Q., Zammuto, I., Zasche, D., Zehetbauer, T., Zhang, Y., Zilker, M., and Zohm, H.

Abstract

The ASDEX Upgrade 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. After the finalization of the tungsten coating of the plasma facing components, the re-availability of all flywheel-generators allowed high-power operation with up to 20 MW heating power at Ip up to 1.2 MA. Implementation of alternative ECRH schemes (140 GHz O2- and X3-mode) facilitated central heating above ne = 1.2 × 1020 m−3 and low q95 operation at Bt = 1.8 T. Central O2-mode heating was successfully used in high P/R discharges with 20 MW total heating power and divertor load control with nitrogen seeding. Improved energy confinement is obtained with nitrogen seeding both for type-I and type-III ELMy conditions. The main contributor is increased plasma temperature, no significant changes in the density profile have been observed. This behaviour may be explained by higher pedestal temperatures caused by ion dilution in combination with a pressure limited pedestal and hollow nitrogen profiles. Core particle transport simulations with gyrokinetic calculations have been benchmarked by dedicated discharges using variations of the ECRH deposition location. The reaction of normalized electron density gradients to variations of temperature gradients and the Te/Ti ratio could be well reproduced. Doppler reflectometry studies at the L–H transition allowed the disentanglement of the interplay between the oscillatory geodesic acoustic modes, turbulent fluctuations and the mean equilibrium E × B flow in the edge negative Er well region just inside the separatrix. Improved pedestal diagnostics revealed also a refined picture of the pedestal transport in the fully developed H-mode type-I ELM cycle. Impurity ion transport turned out to be neoclassical in between ELMs. Electron and energy transport remain anomalous, but exhibit different recovery time scales after an ELM. After

Published
2011

5. Technical challenges in the construction of the steady-state stellarator Wendelstein 7-X

Author

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
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6. Science and technology research and development in support to ITER and the Broader Approach at CEA

Author

Bécoulet, A., primary, Hoang, G.T., additional, Abiteboul, J., additional, Achard, J., additional, Alarcon, T., additional, Alba-Duran, J., additional, Allegretti, L., additional, Allfrey, S., additional, Amiel, S., additional, Ané, J.M., additional, Aniel, T., additional, Antar, G., additional, Argouarch, A., additional, Armitano, A., additional, Arnaud, J., additional, Arranger, D., additional, Artaud, J.F., additional, Audisio, D., additional, Aumeunier, M., additional, Autissier, E., additional, Azcona, L., additional, Back, A., additional, Bahat, A., additional, Bai, X., additional, Baiocchi, B., additional, Balaguer, D., additional, Balme, S., additional, Balorin, C., additional, Barana, O., additional, Barbier, D., additional, Barbuti, A., additional, Basiuk, V., additional, Baulaigue, O., additional, Bayetti, P., additional, Baylard, C., additional, Beaufils, S., additional, Beaute, A., additional, Bécoulet, M., additional, Bej, Z., additional, Benkadda, S., additional, Benoit, F., additional, Berger-By, G., additional, Bernard, J.M., additional, Berne, A., additional, Bertrand, B., additional, Bertrand, E., additional, Beyer, P., additional, Bigand, A., additional, Bonhomme, G., additional, Borel, G., additional, Boron, A., additional, Bottereau, C., additional, Bottollier-Curtet, H., additional, Bouchand, C., additional, Bouquey, F., additional, Bourdelle, C., additional, Bourg, J., additional, Bourmaud, S., additional, Brémond, S., additional, Bribiesca Argomedo, F., additional, Brieu, M., additional, Brun, C., additional, Bruno, V., additional, Bucalossi, J., additional, Bufferand, H., additional, Buravand, Y., additional, Cai, L., additional, Cantone, V., additional, Cantone, B., additional, Caprin, E., additional, Cartier-Michaud, T., additional, Castagliolo, A., additional, Belo, J., additional, Catherine-Dumont, V., additional, Caulier, G., additional, Chaix, J., additional, Chantant, M., additional, Chatelier, M., additional, Chauvin, D., additional, Chenevois, J., additional, Chouli, B., additional, Christin, L., additional, Ciazynski, D., additional, Ciraolo, G., additional, Clairet, F., additional, Clapier, R., additional, Cloez, H., additional, Coatanea-Gouachet, M., additional, Colas, L., additional, Colledani, G., additional, Commin, L., additional, Coquillat, P., additional, Corbel, E., additional, Corre, Y., additional, Cottet, J., additional, Cottier, P., additional, Courtois, X., additional, Crest, I., additional, Dachicourt, R., additional, Dapena Febrer, M., additional, Daumas, C., additional, de Esch, H.P.L., additional, De Gentile, B., additional, Dechelle, C., additional, Decker, J., additional, Decool, P., additional, Deghaye, V., additional, Delaplanche, J., additional, Delchambre-Demoncheaux, E., additional, Delpech, L., additional, Desgranges, C., additional, Devynck, P., additional, Dias Pereira Bernardo, J., additional, Dif-Pradalier, G., additional, Doceul, L., additional, Dong, Y., additional, Douai, D., additional, Dougnac, H., additional, Dubuit, N., additional, Duchateau, J.-L., additional, Ducobu, L., additional, Dugue, B., additional, Dumas, N., additional, Dumont, R., additional, Durocher, A., additional, Duthoit, F., additional, Ekedahl, A., additional, Elbeze, D., additional, Escarguel, A., additional, Escop, J., additional, Faïsse, F., additional, Falchetto, G., additional, Farjon, J., additional, Faury, M., additional, Fedorzack, N., additional, Féjoz, P., additional, Fenzi, C., additional, Ferlay, F., additional, Fiet, P., additional, Firdaouss, M., additional, Francisquez, M., additional, Franel, B., additional, Frauche, J., additional, Frauel, Y., additional, Futtersack, R., additional, Garbet, X., additional, Garcia, J., additional, Gardarein, J., additional, Gargiulo, L., additional, Garibaldi, P., additional, Garin, P., additional, Garnier, D., additional, Gauthier, E., additional, Gaye, O., additional, Geraud, A., additional, Gerome, M., additional, Gervaise, V., additional, Geynet, M., additional, Ghendrih, P., additional, Giacalone, I., additional, Gibert, S., additional, Gil, C., additional, Ginoux, S., additional, Giovannangelo, L., additional, Girard, S., additional, Giruzzi, G., additional, Goletto, C., additional, Goncalves, R., additional, Gonde, R., additional, Goniche, M., additional, Goswami, R., additional, Grand, C., additional, Grandgirard, V., additional, Gravil, B., additional, Grisolia, C., additional, Gros, G., additional, Grosman, A., additional, Guigue, J., additional, Guilhem, D., additional, Guillemaut, C., additional, Guillerminet, B., additional, Guimaraes Filho, Z., additional, Guirlet, R., additional, Gunn, J. P., additional, Gurcan, O., additional, Guzman, F., additional, Hacquin, S., additional, Hariri, F., additional, Hasenbeck, F., additional, Hatchressian, J.C., additional, Hennequin, P., additional, Hernandez, C., additional, Hertout, P., additional, Heuraux, S., additional, Hillairet, J., additional, Honore, C., additional, Hornung, G., additional, Houry, M., additional, Hunstad, I., additional, Hutter, T., additional, Huynh, P., additional, Icard, V., additional, Imbeaux, F., additional, Irishkin, M., additional, Isoardi, L., additional, Jacquinot, J., additional, Jacquot, J., additional, Jiolat, G., additional, Joanny, M., additional, Joffrin, E., additional, Johner, J., additional, Joubert, P., additional, Jourd'Heuil, L., additional, Jouve, M., additional, Junique, C., additional, Keller, D., additional, Klepper, C., additional, Kogut, D., additional, Kubič, M., additional, Labassé, F., additional, Lacroix, B., additional, Lallier, Y., additional, Lamaison, V., additional, Lambert, R., additional, Larroque, S., additional, Latu, G., additional, Lausenaz, Y., additional, Laviron, C., additional, Le, R., additional, Le Luyer, A., additional, Le Niliot, C., additional, Le Tonqueze, Y., additional, Lebourg, P., additional, Lefevre, T., additional, Leroux, F., additional, Letellier, L., additional, Li, Y., additional, Lipa, M., additional, Lister, J., additional, Litaudon, X., additional, Liu, F., additional, Loarer, T., additional, Lombard, G., additional, Lotte, P., additional, Lozano, M., additional, Lucas, J., additional, Lütjens, H., additional, Magaud, P., additional, Maget, P., additional, Magne, R., additional, Mahieu, J.-F., additional, Maini, P., additional, Malard, P., additional, Manenc, L., additional, Marandet, Y., additional, Marbach, G., additional, Marechal, J.-L., additional, Marfisi, L., additional, Marle, M., additional, Martin, C., additional, Martin, V., additional, Martin, G., additional, Martinez, A., additional, Martino, P., additional, Masset, R., additional, Mazon, D., additional, Mellet, N., additional, Mercadier, L., additional, Merle, A., additional, Meshcheriakov, D., additional, Messina, P., additional, Meyer, O., additional, Millon, L., additional, Missirlian, M., additional, Moerel, J., additional, Molina, D., additional, Mollard, P., additional, Moncada, V., additional, Monier-Garbet, P., additional, Moreau, D., additional, Moreau, M., additional, Moreau, P., additional, Morel, P., additional, Moriyama, T., additional, Motassim, Y., additional, Mougeolle, G., additional, Moulton, D., additional, Moureau, G., additional, Mouyon, D., additional, Naim Habib, M., additional, Nardon, E., additional, Négrier, V., additional, Nemeth, J., additional, Nguyen, C., additional, Nguyen, M., additional, Nicolas, L., additional, Nicolas, T., additional, Nicollet, S., additional, Nilsson, E., additional, N'Konga, B., additional, Noel, F., additional, Nooman, A., additional, Norscini, C., additional, Nouailletas, R., additional, Oddon, P., additional, Ohsako, T., additional, Orain, F., additional, Ottaviani, M., additional, Pagano, M., additional, Palermo, F., additional, Panayotis, S., additional, Parrat, H., additional, Pascal, J.-Y., additional, Passeron, C., additional, Pastor, P., additional, Patterlini, J., additional, Pavy, K., additional, Pecquet, A.-L., additional, Pégourié, B., additional, Peinturier, C., additional, Pelletier, T., additional, Peluso, B., additional, Petrzilka, V., additional, Peysson, Y., additional, Pignoly, E., additional, Pirola, R., additional, Pocheau, C., additional, Poitevin, E., additional, Poli, V., additional, Poli, S., additional, Pompon, F., additional, Porchy, I., additional, Portafaix, C., additional, Preynas, M., additional, Prochet, P., additional, Prou, M., additional, Ratnani, A., additional, Raulin, D., additional, Ravenel, N., additional, Renard, S., additional, Ricaud, B., additional, Richou, M., additional, Ritz, G., additional, Roche, H., additional, Roubin, P., additional, Roux, C., additional, Ruiz, K., additional, Sabathier, F., additional, Sabot, R., additional, Saille, A., additional, Saint-Laurent, F., additional, Sakamoto, R., additional, Salasca, S., additional, Salmon, T., additional, Samaille, F., additional, Sanchez, S., additional, Santagiustina, A., additional, Saoutic, B., additional, Sarazin, Y., additional, Sardain, P., additional, Schlosser, J., additional, Schneider, M., additional, Schwob, J., additional, Segui, J., additional, Seguin, N., additional, Selig, G., additional, Serret, D., additional, Signoret, J., additional, Simonin, A., additional, Soldaini, M., additional, Soler, B., additional, Soltane, C., additional, Song, S., additional, Sourbier, F., additional, Sparagna, J., additional, Spitz, P., additional, Spuig, P., additional, Storelli, A., additional, Strugarek, A., additional, Tamain, P., additional, Tena, M., additional, Theis, J., additional, Thomine, O., additional, Thouvenin, D., additional, Torre, A., additional, Toulouse, L., additional, Travère, J., additional, Tsitrone, E., additional, Turck, B., additional, Urban, J., additional, Vallet, J.-C., additional, Vallory, J., additional, Valognes, A., additional, Van Helvoirt, J., additional, Vartanian, S., additional, Verger, J.-M., additional, Vermare, L., additional, Vermare, C., additional, Vezinet, D., additional, Vicente, K., additional, Vidal, J., additional, Vignal, N., additional, Vigne, T., additional, Villecroze, F., additional, Villedieu, E., additional, Vincent, B., additional, Volpe, B., additional, Volpe, D., additional, Volpe, R., additional, Wagrez, J., additional, Wang, H., additional, Wauters, T., additional, Wintersdorff, O., additional, Wittebol, E., additional, Zago, B., additional, Zani, L., additional, Zarzoso, D., additional, Zhang, Y., additional, Zhong, W., additional, and Zou, X.L., additional

Published
2013
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7. Overview of ASDEX Upgrade results

Author

Stroth, U., primary, Adamek, J., additional, Aho-Mantila, L., additional, Äkäslompolo, S., additional, Amdor, C., additional, Angioni, C., additional, Balden, M., additional, Bardin, S., additional, Barrera Orte, L., additional, Behler, K., additional, Belonohy, E., additional, Bergmann, A., additional, Bernert, M., additional, Bilato, R., additional, Birkenmeier, G., additional, Bobkov, V., additional, Boom, J., additional, Bottereau, C., additional, Bottino, A., additional, Braun, F., additional, Brezinsek, S., additional, Brochard, T., additional, Brüdgam, M., additional, Buhler, A., additional, Burckhart, A., additional, Casson, F.J., additional, Chankin, A., additional, Chapman, I., additional, Clairet, F., additional, Classen, I.G.J., additional, Coenen, J.W., additional, Conway, G.D., additional, Coster, D.P., additional, Curran, D., additional, da Silva, F., additional, de Marné, P., additional, D'Inca, R., additional, Douai, D., additional, Drube, R., additional, Dunne, M., additional, Dux, R., additional, Eich, T., additional, Eixenberger, H., additional, Endstrasser, N., additional, Engelhardt, K., additional, Esposito, B., additional, Fable, E., additional, Fischer, R., additional, Fünfgelder, H., additional, Fuchs, J.C., additional, Gál, K., additional, García Muñoz, M., additional, Geiger, B., additional, Giannone, L., additional, Görler, T., additional, da Graca, S., additional, Greuner, H., additional, Gruber, O., additional, Gude, A., additional, Guimarais, L., additional, Günter, S., additional, Haas, G., additional, Hakola, A.H., additional, Hangan, D., additional, Happel, T., additional, Härtl, T., additional, Hauff, T., additional, Heinemann, B., additional, Herrmann, A., additional, Hobirk, J., additional, Höhnle, H., additional, Hölzl, M., additional, Hopf, C., additional, Houben, A., additional, Igochine, V., additional, Ionita, C., additional, Janzer, A., additional, Jenko, F., additional, Kantor, M., additional, Käsemann, C.-P., additional, Kallenbach, A., additional, Kálvin, S., additional, Kappatou, A., additional, Kardaun, O., additional, Kasparek, W., additional, Kaufmann, M., additional, Kirk, A., additional, Klingshirn, H.-J., additional, Kocan, M., additional, Kocsis, G., additional, Konz, C., additional, Koslowski, R., additional, Krieger, K., additional, Kubic, M., additional, Kurki-Suonio, T., additional, Kurzan, B., additional, Lackner, K., additional, Lang, P.T., additional, Lauber, P., additional, Laux, M., additional, Lazaros, A., additional, Leipold, F., additional, Leuterer, F., additional, Lindig, S., additional, Lisgo, S., additional, Lohs, A., additional, Lunt, T., additional, Maier, H., additional, Makkonen, T., additional, Mank, K., additional, Manso, M.-E., additional, Maraschek, M., additional, Mayer, M., additional, McCarthy, P.J., additional, McDermott, R., additional, Mehlmann, F., additional, Meister, H., additional, Menchero, L., additional, Meo, F., additional, Merkel, P., additional, Merkel, R., additional, Mertens, V., additional, Merz, F., additional, Mlynek, A., additional, Monaco, F., additional, Müller, S., additional, Müller, H.W., additional, Münich, M., additional, Neu, G., additional, Neu, R., additional, Neuwirth, D., additional, Nocente, M., additional, Nold, B., additional, Noterdaeme, J.-M., additional, Pautasso, G., additional, Pereverzev, G., additional, Plöckl, B., additional, Podoba, Y., additional, Pompon, F., additional, Poli, E., additional, Polozhiy, K., additional, Potzel, S., additional, Püschel, M.J., additional, Pütterich, T., additional, Rathgeber, S.K., additional, Raupp, G., additional, Reich, M., additional, Reimold, F., additional, Ribeiro, T., additional, Riedl, R., additional, Rohde, V., additional, Rooij, G. v., additional, Roth, J., additional, Rott, M., additional, Ryter, F., additional, Salewski, M., additional, Santos, J., additional, Sauter, P., additional, Scarabosio, A., additional, Schall, G., additional, Schmid, K., additional, Schneider, P.A., additional, Schneider, W., additional, Schrittwieser, R., additional, Schubert, M., additional, Schweinzer, J., additional, Scott, B., additional, Sempf, M., additional, Sertoli, M., additional, Siccinio, M., additional, Sieglin, B., additional, Sigalov, A., additional, Silva, A., additional, Sommer, F., additional, Stäbler, A., additional, Stober, J., additional, Streibl, B., additional, Strumberger, E., additional, Sugiyama, K., additional, Suttrop, W., additional, Tala, T., additional, Tardini, G., additional, Teschke, M., additional, Tichmann, C., additional, Told, D., additional, Treutterer, W., additional, Tsalas, M., additional, Van Zeeland, M. A., additional, Varela, P., additional, Veres, G., additional, Vicente, J., additional, Vianello, N., additional, Vierle, T., additional, Viezzer, E., additional, Viola, B., additional, Vorpahl, C., additional, Wachowski, M., additional, Wagner, D., additional, Wauters, T., additional, Weller, A., additional, Wenninger, R., additional, Wieland, B., additional, Willensdorfer, M., additional, Wischmeier, M., additional, Wolfrum, E., additional, Würsching, E., additional, Yu, Q., additional, Zammuto, I., additional, Zasche, D., additional, Zehetbauer, T., additional, Zhang, Y., additional, Zilker, M., additional, and Zohm, H., additional

Published
2013
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8. Overview of ASDEX Upgrade results

Author

Kallenbach, A., primary, Adamek, J., additional, Aho-Mantila, L., additional, Äkäslompolo, S., additional, Angioni, C., additional, Atanasiu, C.V., additional, Balden, M., additional, Behler, K., additional, Belonohy, E., additional, Bergmann, A., additional, Bernert, M., additional, Bilato, R., additional, Bobkov, V., additional, Boom, J., additional, Bottino, A., additional, Braun, F., additional, Brüdgam, M., additional, Buhler, A., additional, Burckhart, A., additional, Chankin, A., additional, Classen, I.G.J., additional, Conway, G.D., additional, Coster, D.P., additional, de Marné, P., additional, D'Inca, R., additional, Drube, R., additional, Dux, R., additional, Eich, T., additional, Endstrasser, N., additional, Engelhardt, K., additional, Esposito, B., additional, Fable, E., additional, Fahrbach, H.-U., additional, Fattorini, L., additional, Fischer, R., additional, Flaws, A., additional, Fünfgelder, H., additional, Fuchs, J.C., additional, Gál, K., additional, García Muñoz, M., additional, Geiger, B., additional, Gemisic Adamov, M., additional, Giannone, L., additional, Giroud, C., additional, Görler, T., additional, da Graca, S., additional, Greuner, H., additional, Gruber, O., additional, Gude, A., additional, Günter, S., additional, Haas, G., additional, Hakola, A.H., additional, Hangan, D., additional, Happel, T., additional, Hauff, T., additional, Heinemann, B., additional, Herrmann, A., additional, Hicks, N., additional, Hobirk, J., additional, Höhnle, H., additional, Hölzl, M., additional, Hopf, C., additional, Horton, L., additional, Huart, M., additional, Igochine, V., additional, Ionita, C., additional, Janzer, A., additional, Jenko, F., additional, Käsemann, C.-P., additional, Kálvin, S., additional, Kardaun, O., additional, Kaufmann, M., additional, Kirk, A., additional, Klingshirn, H.-J., additional, Kocan, M., additional, Kocsis, G., additional, Kollotzek, H., additional, Konz, C., additional, Koslowski, R., additional, Krieger, K., additional, Kurki-Suonio, T., additional, Kurzan, B., additional, Lackner, K., additional, Lang, P.T., additional, Lauber, P., additional, Laux, M., additional, Leipold, F., additional, Leuterer, F., additional, Lohs, A., additional, Luhmann, N.C., additional, Lunt, T., additional, Lyssoivan, A., additional, Maier, H., additional, Maggi, C., additional, Mank, K., additional, Manso, M.-E., additional, Maraschek, M., additional, Martin, P., additional, Mayer, M., additional, McCarthy, P.J., additional, McDermott, R., additional, Meister, H., additional, Menchero, L., additional, Meo, F., additional, Merkel, P., additional, Merkel, R., additional, Mertens, V., additional, Merz, F., additional, Mlynek, A., additional, Monaco, F., additional, Müller, H.W., additional, Münich, M., additional, Murmann, H., additional, Neu, G., additional, Neu, R., additional, Nold, B., additional, Noterdaeme, J.-M., additional, Park, H.K., additional, Pautasso, G., additional, Pereverzev, G., additional, Podoba, Y., additional, Pompon, F., additional, Poli, E., additional, Polochiy, K., additional, Potzel, S., additional, Prechtl, M., additional, Püschel, M.J., additional, Pütterich, T., additional, Rathgeber, S.K., additional, Raupp, G., additional, Reich, M., additional, Reiter, B., additional, Ribeiro, T., additional, Riedl, R., additional, Rohde, V., additional, Roth, J., additional, Rott, M., additional, Ryter, F., additional, Sandmann, W., additional, Santos, J., additional, Sassenberg, K., additional, Sauter, P., additional, Scarabosio, A., additional, Schall, G., additional, Schmid, K., additional, Schneider, P.A., additional, Schneider, W., additional, Schramm, G., additional, Schrittwieser, R., additional, Schweinzer, J., additional, Scott, B., additional, Sempf, M., additional, Serra, F., additional, Sertoli, M., additional, Siccinio, M., additional, Sigalov, A., additional, Silva, A., additional, Sips, A.C.C., additional, Sommer, F., additional, Stäbler, A., additional, Stober, J., additional, Streibl, B., additional, Strumberger, E., additional, Sugiyama, K., additional, Suttrop, W., additional, Szepesi, T., additional, Tardini, G., additional, Tichmann, C., additional, Told, D., additional, Treutterer, W., additional, Urso, L., additional, Varela, P., additional, Vincente, J., additional, Vianello, N., additional, Vierle, T., additional, Viezzer, E., additional, Vorpahl, C., additional, Wagner, D., additional, Weller, A., additional, Wenninger, R., additional, Wieland, B., additional, Wigger, C., additional, Willensdorfer, M., additional, Wischmeier, M., additional, Wolfrum, E., additional, Würsching, E., additional, Yadikin, D., additional, Yu, Q., additional, Zammuto, I., additional, Zasche, D., additional, Zehetbauer, T., additional, Zhang, Y., additional, Zilker, M., additional, and Zohm, H., additional

Published
2011
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10. Improvement of the phase regulation between two amplifiers feeding the inputs of the 3dB combiner in the ASDEX-Upgrade ICRH system.

Author

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
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11. Lifetime Prolongation of ICRF Generators, Theoretical and Conceptual Aspects.

Author

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
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12. Lifetime Prolongation of ICRF Generators, Practical Aspects and Results.

Author

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
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