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1. Status of the new ECRH system for ASDEX Upgrade

Author

Leuterer, F., Grünwald, G., Monaco, F., Münich, M., Schütz, H., Ryter, F., Wagner, D., Zohm, H., Franke, T., Dammertz, G., Heidinger, R., Koppenburg, K., Thumm, M., Kasparek, W., Gantenbein, G., Hailer, H., Denisov, G.G., Litvak, A., and Zapevalov, V.

Published
2005
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3. Plans for a new ECRH system at ASDEX upgrade

Author

Leuterer, F., Kirov, K., Monaco, F., Münich, M., Schütz, H., Ryter, F., Wagner, D., Wilhelm, R., Zohm, H., Franke, T., Voigt, K., Thumm, M., Heidinger, R., Dammertz, G., Koppenburg, K., Gantenbein, G., Hailer, H., Kasparek, W., Müller, G.A., Bogdashov, A., Denisov, G., Kurbatov, V., Kuftin, A., Litvak, A., Malygin, S., Tai, E., and Zapevalov, V.

Published
2003
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4. The ECRH system of ASDEX Upgrade

Author

Leuterer, F, Beckmann, M, Borchegowski, A, Brinkschulte, H, Chirkov, A, Denisov, G, Empacher, L, Förster, W, Gantenbein, G, Illin, V, Kasparek, W, Kirov, K, Monaco, F, Münich, M, Popov, L, Ryter, F, Schüller, P, Schwörer, K, and Schütz, H

Published
2001
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5. Experience with the ECRH system of ASDEX-Upgrade

Author

Leuterer, F, Beckmann, M, Brinkschulte, H, Monaco, F, Münich, M, Ryter, F, Schütz, H, Empacher, L, Gantenbein, G, Förster, W, Kasparek, W, Schüller, P, Schwörer, K, Borchegowski, A, Fix, A, Illin, V, Popov, L, Sigalaev, V, and Tai, E

Published
2001
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6. Lower Hybrid Current Drive and Recharging of the Ohmic Heating Transformer in ASDEX

Author

Leuterer, F., Eckhartt, D., Söldner, F., Bartiromo, R., Becker, G., Bernhardi, K., Bosch, H. S., Brambilla, M., Brocken, H., Derfler, H., Eberhagen, A., Fußmann, G., Gehre, O., Gernhardt, J., v. Gierke, G., Giuliana, A., Glock, E., Gruber, O., Haas, G., Hesse, M., Janeschitz, G., Karger, F., Keilhacker, M., Klüber, O., Kornherr, M., Kotzé, P. B., Kislyakov, A., Lenoci, M., Lisitano, G., Mayer, H. M., McCormick, K., Meisel, D., Mertens, V., Müller, E. R., Münich, M., Murmann, H., Niedermeyer, H., Poschenrieder, W., Rapp, H., Ryter, F., Schmitter, K. H., Schneider, F., Siller, G., Smeulders, P., Steuer, K. H., Vien, T., Vlases, G., Wagner, F., v. Woyna, F., Zouhar, M., Zichichi, Antonino, editor, and Knoepfel, Heinz, editor

Published
1986
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7. Matched calorimetric loads for high power millimeter-wave gyrotrons

Author

Bruschi, A, Muzzini, V, Spinicchia, N, Benocci, R, Carcano, G, Cirant, S, Gandini, F, Gittini, G, Granucci, G, Leuterer, F, Mellera, V, Monaco, F, Muenich, M, Nardone, A, Schuetz, H, Signorelli, E, Simonetto, A, Sozzi, C, Bruschi A., Muzzini V., Spinicchia N., Benocci R., Carcano G., Cirant S., Gandini F., Gittini G., Granucci G., Leuterer F., Mellera V., Monaco F., Muenich M., Nardone A., Schuetz H., Signorelli E., Simonetto A., Sozzi C., Bruschi, A, Muzzini, V, Spinicchia, N, Benocci, R, Carcano, G, Cirant, S, Gandini, F, Gittini, G, Granucci, G, Leuterer, F, Mellera, V, Monaco, F, Muenich, M, Nardone, A, Schuetz, H, Signorelli, E, Simonetto, A, Sozzi, C, Bruschi A., Muzzini V., Spinicchia N., Benocci R., Carcano G., Cirant S., Gandini F., Gittini G., Granucci G., Leuterer F., Mellera V., Monaco F., Muenich M., Nardone A., Schuetz H., Signorelli E., Simonetto A., and Sozzi C.

Abstract

High power gyrotron testing at long pulses is a necessary step in the development of mm-wave systems for fusion research. For this purpose a compact calorimetric load is being developed, with low overall reflectivity (< 5%) and aiming at 1 MW-CW capabilities, after the good performances of the loads (0.5 MW, 0.5 s per pulse) installed on the 140 GHz ECRH plant of the FTU Tokamak in Frascati. Tests at the same frequency but at higher power (0.7 MW, 1 s) and longer pulses (up to 2 s at 0.5 MW) on the ASDEX-Upgrade ECRH plant showed, after repeated exposures, damages on the absorbing layer, recognized as thermal effects due to the local enhancement of incident power: the effects visible near the entrance port are explained studying the superposition (with interference) of waves reflected inside the sphere. Samples of degraded and non-degraded coating have been analyzed with various techniques, revealing changes of the substrate's physical characteristics. Measurements of absorber temperature during and after the pulse, performed with an infrared detector looking directly into the load, allowed estimates of the peak temperature and thermal properties of the coating in the real working conditions. Improvements on power deposition, geometry and cooling are proposed, to be integrated in a new load design. (C) 2003 Elsevier Science B.V. All rights reserved.

Published
2003

8. Overview of ASDEX upgrade results

Author

Zohm H., Adamek J., Angioni C., Antar G., Atanasiu C. V., Balden M., Becker W., Behler K., Behringer K., Bergmann A., Bertoncelli T., Bilato R., Bobkov V., Boom J., Bottino A., Brambilla M., Braun F., Bruedgam M., Buhler A., Chankin A., Classen I., Conway G. D., Coster D. P., de Marne P., D'Inca R., Drube R., Dux R., Eich T., Engelhardt K., Esposito B., Fahrbach H-U., Fattorini L., Fink J., Fischer R., Flaws A., Foley M., Forest C., Fuchs J. C., Gal K., Munoz M. Garcia, Adamov M. Gemisic, Giannone L., Goerler T., Gori S., da Graca S., Granucci G., Greuner H., Gruber O., Gude A., Guenter S., Haas G., Hahn D., Harhausen J., Hauff T., Heinemann B., Herrmann A., Hicks N., Hobirk J., Hoelzl M., Holtum D., Hopf C., Horton L., Huart M., Igochine V., Janzer M., Jenko F., Kallenbach A., Kalvin S., Kardaun O., Kaufmann M., Kick M., Kirk A., Klingshirn H-J., Koscis G., Kollotzek H., Konz C., Krieger K., Kurki-Suonio, Kurzan B., Lackner K., Lang P. T., Langer B., Lauber P., Laux M., Leuterer F., Likonen J., Liu L., Lohs A., Lunt T., Lyssoivan A., Maggi C. F., Manini A., Mank K., Manso M-E., Mantsinen M., Maraschek M., Martin P., Mayer M., McCarthy P., McCormick K., Meister H., Meo F., Merkel P., Merkel R., Mertens V., Merz F., Meyer H., Mlynek A., Monaco F., Mueller H-W., Muenich M., Murmann H., Neu G., Neu R., Neuhauser J., Nold B., Noterdaeme J-M., Pautasso G., Pereverzev G., Poli E., Potzel, Pueschel M., Puetterich T., Pugno R., Raupp G., Reich M., Reiter B., Ribeiro T., Riedl R., Rohde V., Roth J., Rott M., Ryter F., Sandmann W., Santos J., Sassenberg, Sauter P., Scarabosio A., Schall G., Schilling H-B., Schirmer J., Schmid A., Schmid K., Schneider W., Schramm G., Schrittwieser R., Schustereder W., Schweinzer J., Schweizer S., Scott B., Seidel U., Sempf M., Serra F., Sertoli M., Siccinio M., Sigalov A., Silva A., Sips C. C., Speth E., Staebler A., Stadler R., Steuer K-H., Stober J., Streibl B., Strumberger E., Suttrop W., Tardini G., Tichmann C., Treutterer W., Troester C., Urso L., Vainonen-Ahlgren E., Varela P., Vermare L., Volpe F., Wagner D., Wigger C., Wischmeier M., Wolfrum E., Wuersching E., Yadikin D., Yu Q., Zasche D., Zehetbauer T., and Zilker M.

Subjects
Nuclear and High Energy Physics, Materials science, Nuclear engineering, Condensed Matter Physics, 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, ASDEX Upgrade, ITER, 0103 physical sciences, tokamak physics, 010306 general physics, DEMO, nuclear fusion
Abstract

ASDEX Upgrade was operated with a fully W-covered wall in 2007 and 2008. Stationary H-modes at the ITER target values and improved H-modes with H up to 1.2 were run without any boronization. The boundary conditions set by the full W wall (high enough ELM frequency, high enough central heating and low enough power density arriving at the target plates) require significant scenario development, but will apply to ITER as well. D retention has been reduced and stationary operation with saturated wall conditions has been found. Concerning confinement, impurity ion transport across the pedestal is neoclassical, explaining the strong inward pinch of high-Z impurities in between ELMs. In improved H-mode, the width of the temperature pedestal increases with heating power, consistent with a β1/2pol,ped scaling. In the area of MHD instabilities, disruption mitigation experiments using massive Ne injection reach volume averaged values of the total electron density close to those required for runaway suppression in ITER. ECRH at the q = 2 surface was successfully applied to delay density limit disruptions. The characterization of fast particle losses due to MHD has shown the importance of different loss mechanisms for NTMs, TAEs and also beta-induced Alfven eigenmodes (BAEs). Specific studies addressing the first ITER operational phase show that O1 ECRH at the HFS assists reliable low-voltage breakdown. During ramp-up, additional heating can be used to vary li to fit within the ITER range. Confinement and power threshold in He are more favourable than in H, suggesting that He operation could allow us to assess H-mode operation in the non-nuclear phase of ITER operation.

Published
2009

9. 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

10. Overview of ASDEX Upgrade Results

Author

Gruber, O., Bosch, H., Guenter, S., Herrmann, A., Kallenbach, A., Kaufmann, M., Krieger, K., Lackner, K., Mertens, V., Neu, R., Ryter, F., Schweinzer, J., Staebler, A., Suttrop, W., Wolf, R., Asmussen, K., Bard, A., Becker, G., Behler, K., Behringer, K., Bergmann, A., Bessenrodt-Weberpals, M., Borrass, K., Braams, B., Brambilla, M., Brandenburg, R., Braun, F., Brinkschulte, H., Brueckner, R., Bruesehaber, B., Buechl, K., Buhler, A., Callaghan, H., Carlson, A., Coster, D., Pena Hempel, S., Dorn, C., Drube, R., Dux, R., Egorov, S., Engelhardt, W., Fahrbach, H., Fantz, U., Feist, H., Franzen, P., Fuchs, J., Fussmann, G., Gafert, J., Gantenbein, G., Gehre, O., Geier, A., Gernhardt, J., Gubanka, E., Gude, A., Haas, G., Hallatschek, K., Hartmann, D., Heinemann, B., Herppich, G., Herrmann, W., Hofmeister, F., Holzhauer, E., Jacobi, D., Kakoulidis, M., Karakatsanis, N., Kardaun, O., Khutoretski, A., Kollotzek, H., Koetterl, S., Kraus, W., Kurzan, B., Kyriakakis, G., Lang, P., Lang, R., Laux, M., Lengyel, L., Leuterer, F., Lorenz, A., Maier, H., Manso, M., Maraschek, M., Markoulaki, M., Mast, K., McCarthy, P., Meisel, D., Meister, H., Merkel, R., Meskat, J., Mueller, H., Muenich, M., Murmann, H., Napiontek, B., Neu, G., Neuhauser, J., Niethammer, M., Noterdaeme, J., Pautasso, G., Peeters, A., Pereverzew, G., Pinches, S., Raupp, G., Reinmüller, K., Riedl, R., Rohde, V., Roehr, H., Roth, J., Salzmann, H., Sandmann, W., Schilling, H., Schloegl, D., Schmidtmann, K., Schneider, H., Schneider, R., Schneider, W., Schramm, G., Schweizer, S., Schwoerer, R., Scott, B., Seidel, U., Serra, F., Sesnic, S., Sihler, C., Silva, A., Speth, E., Steuer, K., Stober, J., Streibl, B., Thoma, A., Treutterer, W., Troppmann, M., Tsois, N., Ullrich, W., Ulrich, M., Varela, P., Verbeek, H., Vollmer, O., Wedler, H., Weinlich, M., Wenzel, U., Wesner, F., Wunderlich, R., Xantopoulosa, N., Yu, Q., and Zasche, D.

Published
1999

11. First ECRH Experiments in ASDEX Upgrade

Author

Leuterer, F., Gresillon, D., Brinkschulte, H., Sitenko, A., Monaco, F., Zagorodny, A., Muenich, M., Peeters, A., Pereverzev, G., Ryter, F., Suttrop, W., ASDEX-Upgrade-Team, and European Physical Society, Geneva(CH)

Published
1996

12. Frequency measurements of the gyrotrons used for collective Thomson scattering diagnostics at TEXTOR and ASDEX Upgrade

Author

Woskov, P., primary, Bindslev, H., additional, Leipold, F., additional, Meo, F., additional, Nielsen, S. K., additional, Tsakadze, E. L., additional, Korsholm, S. B., additional, Scholten, J., additional, Tito, C., additional, Westerhof, E., additional, Oosterbeek, J. W., additional, Leuterer, F., additional, Monaco, F., additional, Muenich, M., additional, and Wagner, D., additional

Published
2006
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13. Divertor tokamak operation at high densities on ASDEX Upgrade

Author

Gruber, O, primary, Mertens, V, additional, Neuhauser, J, additional, Ryter, F, additional, Suttrop, W, additional, Albrecht, M, additional, Alexander, M, additional, Asmussen, K, additional, Becker, G, additional, Behler, K, additional, Behringer, K, additional, Bergmann, A, additional, Bessenrodt-Weberpals, M, additional, Borras, K, additional, Bosch, H-S, additional, Braams, B, additional, Brambilla, M, additional, Braun, F, additional, Brinkschulte, H, additional, Büchl, K, additional, Buhler, A, additional, Carlson, A, additional, Chodura, R, additional, Coster, D, additional, Cupido, L, additional, Blank, H J De, additional, Hempel, S De Pena, additional, Deschka, S, additional, Dorn, C, additional, Drube, R, additional, Dux, R, additional, Engelhardt, W, additional, Engstler, J, additional, Fahrbach, H-U, additional, Feist, H-U, additional, Fiedler, S, additional, Franzen, P, additional, Fuchs, J C, additional, Fussmann, G, additional, Gafert, J, additional, Gehre, O, additional, Gernhardt, J, additional, Günter, S, additional, Haas, G, additional, Hallatschek, K, additional, Hartmann, J, additional, Heinemann, B, additional, Herppich, G, additional, Herrmann, A, additional, Herrmann, W, additional, Hirsch, S, additional, Hoek, M, additional, Hoenen, F, additional, Hofmeister, F, additional, Hohenoecker, H, additional, Holzhauer, E, additional, Ignacz, P, additional, Jacobi, D, additional, Junker, W, additional, Kakoulidis, M, additional, Kallenbach, A, additional, Karakatsanis, N, additional, Kardaun, O, additional, Kass, T, additional, Kaufmann, M, additional, Khutoretski, A, additional, Kollotzek, H, additional, Koeppendoerfer, W, 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, Maraschek, M, additional, Markoulaki, M, additional, Mast, K-F, additional, McCarthy, P, additional, Meisel, D, additional, Meister, H, additional, Merkel, R, additional, Mueller, H W, additional, Muenich, M, additional, Murmann, H, additional, Napiontek, B, additional, Neu, G, additional, Neu, R, additional, Niethammer, M, additional, Noterdaeme, J-M, additional, Pasch, E, additional, Pautasso, G, additional, Peeters, A G, additional, Pereverzev, G, additional, Pitcher, C S, additional, Poschenrieder, W, additional, Raupp, G, additional, Reinmueller, K, additional, Riedl, R, additional, Rohde, V, additional, Roehr, H, additional, Roth, J, additional, Salzmann, H, additional, Sandmann, W, additional, Schilling, H-B, additional, Schittenhelm, M, additional, Schloegl, D, additional, Schneider, H, additional, Schneider, R, additional, Schneider, W, additional, Schramm, G, additional, Schweinzer, J, additional, Schweizer, S, additional, Schwoerer, R, additional, Scott, B D, additional, Seidel, U, additional, Serra, F, additional, Sesnic, S, additional, Silva, A, additional, Sokoll, M, additional, Speth, E, additional, Staebler, A, additional, Steuer, K-H, additional, Stober, J, additional, Streibl, B, additional, Thoma, A, additional, Treutterer, W, additional, Troppmann, M, additional, Tsois, N, additional, Ulrich, M, additional, Varela, P, additional, Verbeek, H, additional, Vollmer, O, additional, Wedler, H, additional, Weinlich, M, additional, Wenzel, U, additional, Wesner, F, additional, Wolf, R, additional, Wunderlich, R, additional, Xantopoulus, N, additional, Yu, Q, additional, Zasche, D, additional, Zehetbauer, T, additional, Zehrfeld, H-P, additional, Zohm, H, additional, and Zouhar, M, additional

Published
1997
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15. Status, Operation, and Extension of the ECRH System at ASDEX Upgrade

Author

Wagner, D., Stober, J., Leuterer, F., Monaco, F., Muller, S., Muenich, M., Rapson, C. J., Reich, M., Schubert, M., Schuetz, H., Treutterer, W., Zohm, H., Thumm, M., Scherer, T., Meier, A., Gantenbein, G., Jelonnek, J., Kasparek, W., Lechte, C., Plaum, B., Goodman, T., Litvak, A. G., Denisov, G. G., Chirkov, A., Zapevalov, V., Malygin, V., Popov, L. G., Nichiporenko, V. O., Myasnikov, V. E., Tai, E. M., Solyanova, E. A., Malygin, S. A., and ASDEX Upgrade Team

Subjects
Two-frequency gyrotron, Electron cyclotron resonance heating, Millimeter wave stray radiation
Abstract

The upgraded electron cyclotron resonance heating (ECRH) system at ASDEX Upgrade (AUG) has been routinely used with eight gyrotrons during the last experimental campaign. A further upgrade will replace the existing system of four short-pulse (140 GHz, 2 s, 500 kW) gyrotrons. The final goal is to have around 6.5-7 MW at 140 GHz (or 5.5 MW at 105 GHz) from eight units available in the plasma during the whole AUG discharge (10 s). The system operates at 140 and 105 GHz with X2, O2 and X3 schemes. For B > 3 T also an ITER-like O1-scenario can be run using the 105 GHz option. Four of the eight launching antennas are capable of fast poloidal movements necessary for real-time control of the location of power deposition.

16. Progress in the new ECRH system for ASDEX Upgrade.

Author

Leuterer, F., Gruenwald, G., Monaco, F., Muenich, M., Schuetz, H., Ryter, F., Wagner, D., Wilhelm, R., Zohm, H., Franke, T., Thumm, M., Dammertz, G., Heidinger, H., Koppenburg, K., Yang, X., Kasparek, W., Gantenbein, G., Hailer, H., Denisov, G.G., and Litvak, A.

Published
2004
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19. Matched calorimetric loads for high power millimeter-wave gyrotrons

Author

G. Gittini, N. Spinicchia, H. Schuetz, F. Leuterer, Alessandro Bruschi, F. Monaco, E. Signorelli, Alessandro Simonetto, V. Muzzini, F. Gandini, G. Carcano, Gustavo Granucci, Roberto Benocci, A. Nardone, V. Mellera, Carlo Sozzi, M. Muenich, S. Cirant, Bruschi, A, Muzzini, V, Spinicchia, N, Benocci, R, Carcano, G, Cirant, S, Gandini, F, Gittini, G, Granucci, G, Leuterer, F, Mellera, V, Monaco, F, Muenich, M, Nardone, A, Schuetz, H, Signorelli, E, Simonetto, A, and Sozzi, C

Subjects
Tokamak, Materials science, business.industry, Gyrotron, Mechanical Engineering, Amplifier, Calorimetric load, Fusion power, Temperature measurement, Reflectivity, law.invention, Power (physics), Calorimetric loads, High power, Gyrotrons, Optics, Nuclear Energy and Engineering, law, Extremely high frequency, General Materials Science, business, Civil and Structural Engineering
Abstract

High power gyrotron testing at long pulses is a necessary step in the development of mm-wave systems for fusion research. For this purpose a compact calorimetric load is being developed, with low overall reflectivity (< 5%) and aiming at 1 MW-CW capabilities, after the good performances of the loads (0.5 MW, 0.5 s per pulse) installed on the 140 GHz ECRH plant of the FTU Tokamak in Frascati. Tests at the same frequency but at higher power (0.7 MW, 1 s) and longer pulses (up to 2 s at 0.5 MW) on the ASDEX-Upgrade ECRH plant showed, after repeated exposures, damages on the absorbing layer, recognized as thermal effects due to the local enhancement of incident power: the effects visible near the entrance port are explained studying the superposition (with interference) of waves reflected inside the sphere. Samples of degraded and non-degraded coating have been analyzed with various techniques, revealing changes of the substrate's physical characteristics. Measurements of absorber temperature during and after the pulse, performed with an infrared detector looking directly into the load, allowed estimates of the peak temperature and thermal properties of the coating in the real working conditions. Improvements on power deposition, geometry and cooling are proposed, to be integrated in a new load design. (C) 2003 Elsevier Science B.V. All rights reserved.

Published
2003
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21. Overview of ASDEX Upgrade results

Author

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.

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