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4. Plasma Confinement in Stellarator Systems

Author

Bartlett, D. V., Cannici, G., Cattanei, G., Dorst, D., Elsner, A., Feist, J. H., Grieger, G., Hacker, H., How, J., Jaeckel, H., Jaenicke, R., Javel, P., Junker, J., Kick, M., Lathe, R., Leuterer, F., Lister, G. G., Mahn, C., Marlier, S., Mueller, G., Ohlendorf, W., Ott, W., Rau, F., Renner, H., Ringler, H., Saffert, J., Sapper, J., Smeulders, R., Speth, E., Tutter, M., Weller, A., Wuersching, E., Wobig, H., Dellis, A. N., Johnson, P. C., Lees, D. J., Lomas, P. J., Selden, A. C., Thomas, P. R., and Lloyd, B.

Published
1981

8. Spectra of highly ionized xenon (6–30 nm) excited in W7-AS plasmas

Author

Hacker, H.H., Burhenn, R., Kondo, K., Anton, M., Assmus, D., Baeumel, S., Beidler, C., Bindemann, T., Brakel, R., Cattanei, G., Dinklage, A., Dodhy, A., Dorst, D., Ehmler, H., Elsner, A., Endler, M., Engelhardt, K., Erckmann, V., Feng, Y., Fuchs, C., Gadelmeier, F., Geiger, J., Giannone, L., Grigull, P., Gruenwald, G., Grulke, O., Harmeyer, E., Hartfuss, H.J., Herrnegger, F., Hirsch, M., Hofner, J., Hollmann, F., Holzhauer, E., Igitkhanov, Y., Jaenicke, R., Karger, F., Kick, M., Kisslinger, J., Klose, S., Knauer, J., Kroiss, H., Kühner, G., Kus, A., Laqua, H., Liu, R., Maassberg, H., Marushchenko, N., McCormick, K., Michel, G., Noke, F., Ott, W., Otte, M., Pacco-Duechs, M.G., Penningsfeld, F.P., Polunovsky, E., Probst, F., Purps, F., Ruhs, N., Rust, N., Saffert, N.J., Salat, A., Sallander, J., Sardei, F., Schneider, F., Schubert, M., Sidorenko, I., Speth, E., Suess, R., Thomsen, H., Volpe, F., Wagner, F., Weller, A., Wendland, C., Werner, A., Wobig, H., Wuersching, E., and Zimmermann, D.

Published
2001
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17. Development of a Novel Compact RF–Source

Author

Heinemann, B., primary, Feist, J.-H., additional, Kraus, W., additional, Probst, F., additional, Riedl, R., additional, Speth, E., additional, Busch, M., additional, and Szcepaniak, W., additional

Published
1997
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22. Outline design of a neutral beam injector for ITER EDA

Author

Paméla, J., primary, Hemsworth, R., additional, Feist, J., additional, Fumelli, M., additional, Heinemann, B., additional, Jacquot, C., additional, Jequier, F., additional, Lochter, M., additional, Martin, S., additional, Nightingale, M., additional, Sielanko, J., additional, Simonin, A., additional, Speniak, C., additional, Speth, E., additional, Taylor, N., additional, Thompson, E., additional, and Watson, M., additional

Published
1995
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37. Analysis of plasma dynamics of a negative ion source based on probe measurements.

Author

Bandyopadhyay, M., Tanga, A., Falter, H. D., Franzen, P., Heinemann, B., Holtum, D., Kraus, W., Lackner, K., McNeely, P., Riedl, R., Speth, E., and Wilhelm, R.

Subjects
PLASMA dynamics, ANIONS, ION sources, PLASMA gases, MAGNETIC separators, ELECTRIC fields
Abstract

Measurements and analysis of the plasma flow in an ion source made for negative ion extraction are reported in this article. The plasma flow has been measured using a Mach probe having two orthogonal probe heads. The plasma flow along the axis is driven by the electron pressure gradient, dragging along the ions via a measured ambipolar electric field against the collisional drag on the background gas. The force on the ions created by the electric field is mainly balanced by the collisional drag force. The collision between the ions and the background gas creates a pressure gradient along the flow direction. The one-dimensional plasma dynamic analysis supports the consistency of the experimental observations. The presence of a transverse magnetic filter reduces the plasma flow velocity, which could affect the negative ion production on the cesiated grid surface. A simple analysis shows that a strong plasma flow could enhance the surface production of negative ions. [ABSTRACT FROM AUTHOR]

Published
2004
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40. Axially Symmetric Divertor Experiment (ASDEX) Upgrade Team (vol 81, 033507, 2010)

Author

Adamek, J., Angioni, C., Antar, G., Atanasiu, C.V., Balden, M., Becker, W., Behler, K., Behringer, K., Bergmann, A., Bilato, R., Bobkov, V., Boom, J., Bottino, A., Brambilla, M., Braun, F., Brüdgam, M., Buhler, A., Chankin, A., Classen, I., Conway, G.D., Coster, D.P., de Marne, P., D'Inca, R., Dodt, D., Doerk-Bendig, H., Drube, R., Dux, R., Eich, T., Endstrasser, N., Engelhardt, K., Fahrbach, H.-U., Fattorini, L., Fischer, R., Forest, C., Fuchs, J.C., Gal, K., Munoz, M.G., Adamov, M.G., Giannone, L., Görler, L., Gori, S., da Graca, S., Greuner, H., Gruber, O., Gude, A., Günter, S., Haas, G., Hammer, N., Hauff, T., Heinemann, B., Herrmann, A., Hicks, N., Hobirk, J., Hölzl, M., Holtum, D., Hopf, C., Huart, M., Igochine, V., Janzer, M., Jenko, F., Kagarmanov, A., Kallenbach, A., Kammel, A., Kalvin, S., Kardaun, O., Kaufmann, M., Kick, M., Kirk, A., Klingshirn, H.-J., Koscis, G., Kollotzek, H., Konz, C., Krieger, K., Kurki-Suonio, T., 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., Mank, K., Manso, M.-E., Mantsinen, M., Maraschek, M., Martin, P., Mayer, M., McCarthy, P., McCormick, K., McDermott, R., Meister, H., Meo, Fernando, Merkel, P., Merkel, R., Mertens, V., Merz, F., Meyer, H., Mlynek, A., Monaco, F., Müller, H.-W., Münich, M., Murmann, H., Neu, G., Neu, R., Neuhauser, J., Nold, B., Noterdaeme, J.M., Pautasso, G., Pereverzev, G., Poli, E., Potzel, S., Püschel, M., Pütterich, T., 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., Schneider, W., Schrittwieser, R., Schweinzer, J., Scott, B., Seidel, U., Sempf, M., Serra, F., Sertoli, M., Siccinio, M., Sigalov, A., Silva, A., Speth, E., Stäbler, A., Stadler, R., Steuer, K.-H., Stober, J., Streibl, B., Strumberger, E., Suttrop, W., Tardini, G., Tichmann, C., Treutterer, W., Urso, L., Vainonen-Ahlgren, E., Varela, P., Vorpahl, C., Wagner, D., Wigger, C., Wischmeier, M., Wolfrum, E., Würsching, E., Yadikin, D., Yu, Q., Zasche, D., Zehetbauer, T., Zilker, M., and Zohm, H.

Subjects
Fusion energy, Fusionsenergi, Fusionsenergiforskning
Published
2010

41. 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

45. Plasma wall interaction and its implication in an all tungsten divertor tokamak. Invited Paper

Author

Neu, R., Balden, M., Bobkov, V., Dux, R., Gruber, O., Herrmann, A., Kallenbach, A., Kaufmann, M., Maggi, C. F., Maier, H., Müller, H. W., Pütterich, T., Pugno, R., Rohde, V., Sips, A. C. C., Stober, J., Suttrop, W., Angioni, C., Atanasiu, C. V., Becker, W., Behler, K., Behringer, K., Bergmann, A., Bertoncelli, T., Bilato, R., Bottino, A., Brambilla, M., Braun, F., Buhler, A., Chankin, A., Conway, G., Coster, D. P., de Marne, P., Dietrich, S., Dimova, K., Drube, R., Eich, T., Engelhardt, K., Fahrbach, H.-U., Fantz, U., Fattorini, L., Fink, J., Fischer, R., Flaws, A., Franzen, P., Fuchs, J. C., Gal, K., Garcia Munoz, M., Gemisic-Adamov, M., Giannone, L., Gori, S., da Graca, S., Greuner, H., Gude, A., Günter, S., Haas, G., Harhausen, J., Heinemann, B., Hicks, N., Hobirk, J., Holtum, D., Hopf, C., Horton, L., Huart, M., Igochine, V., Kalvin, S., Kardaun, O., Kick, M., Kocsis, G., Kollotzek, H., Konz, C., Krieger, K., Kurki-Suonio, T., Kurzan, B., Lackner, K., Lang, P. T., Lauber, P., Laux, M., Likonen, J., Liu, L., Lohs, A., Mank, K., Manini, A., Manso, M.-E., Maraschek, M., Martin, P., Martin, Y., Mayer, M., McCarthy, P., McCormick, K., Meister, H., Meo, F., Merkel, P., Merkel, R., Mertens, V., Merz, F., Meyer, H., Mlynek, M., Monaco, F., Murmann, H., Neu, G., Neuhauser, J., Nold, B., Noterdaeme, J.-M., Pautasso, G., Pereverzev, G., Poli, E., Pueschel, M., Raupp, G., Reich, M., Reiter, B., Ribeiro, T., Riedl, R., Roth, J., Rott, M., Ryter, F., Sandmann, W., Santos, J., Sassenberg, K., Scarabosio, A., Schall, G., Schirmer, J., Schmid, A., Schneider, W., Schramm, G., Schrittwieser, R., Schustereder, W., Schweinzer, J., Schweizer, S., Scott, B., Seidel, U., Serra, F., Sertoli, M., Sigalov, A., Silva, A., Speth, E., Stäbler, A., Steuer, K.-H., Strumberger, E., Tardini, G., Tichmann, C., Treutterer, W., Tröster, C., Urso, L., Vainonen-Ahlgren, E., Varela, P., Vermare, L., Wagner, D., Wischmeier, M., Wolfrum, E., Würsching, E., Yadikin, D., Yu, Q., Zasche, D., Zehetbauer, T., Zilker, M., and Zohm, H.

Published
2007

46. Modeling of a Negative Ion RF Source for ITER NBI

Author

Dirk Wünderlich, Gutser, R., Fantz, U., Berger, M., Christ-Koch, S., Falter, H. D., Franzen, P., Fröschle, M., Heinemann, B., Kraus, W., Martens, C., Mcneely, P., Riedl, R., and Speth, E.

Published
2007

50. TECHNICAL FEATURES AND PROGRESS OF ASDEX UPGRADE

Author

Köppendörfer, W., primary, Blaumoser, M., additional, Ennen, K., additional, Gernhardt, J., additional, Gruber, J., additional, Gruber, O., additional, Jacobi, D., additional, Jakobus, W., additional, Kaufmann, M., additional, Kollotzek, H., additional, Lackner, E., additional, Lackner, K., additional, Larcher, T.v., additional, Mathis, R., additional, Mukherjee, S.B., additional, Noterdaeme, J.M., additional, Neuhauser, J., additional, Pillsticker, M., additional, Preis, H., additional, Reese, W.H., additional, Schneider, H., additional, Schweizer, S., additional, Seidel, U., additional, Sombach, B., additional, Speth, E., additional, Streibl, B., additional, Troppmann, M., additional, Venus, G., additional, Vernickel, H., additional, Wesner, A., additional, and Wieczorek, A., additional

Published
1986
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