Reversed shear Alfvén eigenmodes (RSAE) that were observed in the Joint European Torus (JET) [P. H. Rebut and B. E. Keen, Fusion Technol.11, 13 (1987)] and DIII-D [J. L. Luxon, Nucl. Fusion42, 614 (2002)] are studied with the ideal magnetohydrodynamic code NOVA-K [C. Z. Cheng, Phys. Rep.211, 1 (1992)]. It was found that the frequency behavior of the RSAEs can be described accurately by the NOVA-K code when plasma compressibility effects and toroidal plasma rotation are taken into account. For the mode activity on JET, the calculated drive exceeds the mode damping rate, consistent with experimental observations, while on DIII-D the growth rate from neutral beam ions for modes with high toroidal mode numbers is insufficient to account for the excitation of the modes and a major part of the drive comes from the background plasma.
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Research Article|
May 08 2006
Interpretation of core localized Alfvén eigenmodes in DIII-D and Joint European Torus reversed magnetic shear plasmasa)
G. J. Kramer;
G. J. Kramer
c)
Princeton Plasma Physics Laboratories
, P.O. Box 451, Princeton, New Jersey 08543
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R. Nazikian;
R. Nazikian
Princeton Plasma Physics Laboratories
, P.O. Box 451, Princeton, New Jersey 08543
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B. Alper;
B. Alper
Euratom/UKAEA Fusion Association
, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
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M. de Baar;
M. de Baar
Euratom/UKAEA Fusion Association
, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
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H. L. Berk;
H. L. Berk
Institute for Fusion Studies
, Austin, Texas 78712
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G.-Y. Fu;
G.-Y. Fu
Princeton Plasma Physics Laboratories
, P.O. Box 451, Princeton, New Jersey 08543
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N. N. Gorelenkov;
N. N. Gorelenkov
Princeton Plasma Physics Laboratories
, P.O. Box 451, Princeton, New Jersey 08543
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G. McKee;
G. McKee
University of Wisconsin
, Madison, Wisconsin 53706
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S. D. Pinches;
S. D. Pinches
Max Planck Institute of Plasmaphysics
, Euratom Association, Garching 85748, Germany
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T. L. Rhodes;
T. L. Rhodes
Institute of Plasma and Fusion Research, Electrical Engineering Department,
University of California
, Los Angeles, California 90024
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S. E. Sharapov;
S. E. Sharapov
Euratom/UKAEA Fusion Association
, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
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W. M. Solomon;
W. M. Solomon
Princeton Plasma Physics Laboratories
, P.O. Box 451, Princeton, New Jersey 08543
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M. A. van Zeeland;
M. A. van Zeeland
Oak Ridge Institute for Science and Education
, Oak Ridge, Tennessee 37831
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JET EFDA Contributors
JET EFDA Contributors
d)
Euratom/UKAEA Fusion Association
, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
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Phys. Plasmas 13, 056104 (2006)
Article history
Received:
October 25 2005
Accepted:
February 20 2006
Citation
G. J. Kramer, R. Nazikian, B. Alper, M. de Baar, H. L. Berk, G.-Y. Fu, N. N. Gorelenkov, G. McKee, S. D. Pinches, T. L. Rhodes, S. E. Sharapov, W. M. Solomon, M. A. van Zeeland, JET EFDA Contributors; Interpretation of core localized Alfvén eigenmodes in DIII-D and Joint European Torus reversed magnetic shear plasmas. Phys. Plasmas 1 May 2006; 13 (5): 056104. https://doi.org/10.1063/1.2186049
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