Low-frequency Alfvén gap modes in rotating tokamak plasmas

J. W. Haverkort; H. J. De Blank; B. Koren

doi:10.1088/0741-3335/53/4/045004

Low-frequency Alfvén gap modes in rotating tokamak plasmas

J. W. Haverkort, H. J. De Blank, B. Koren

Research output: Contribution to journal › Article › Scientific › peer-review

4 Citations (Scopus)

Abstract

As a result of toroidal rotation, sequences of new global modes are predicted to arise in magnetically confined plasmas. The frequencies of these Alfvén modes lie inside gaps of the continuous magnetohydrodynamic (MHD) spectrum that are created or enlarged by toroidal flow. The numerically obtained results are compared with an analytical investigation, yielding a useful criterion for mode existence. Because of their low frequencies, these modes may be easily destabilized by energetic particles. Because of their sensitivity to the Mach number however, these modes can provide a valuable extension to MHD spectroscopy by giving information on the rotational velocity.

Original language	English
Article number	045004
Journal	Plasma Physics and Controlled Fusion
Volume	53
Issue number	4
DOIs	https://doi.org/10.1088/0741-3335/53/4/045004
Publication status	Published - 1 Apr 2011
Externally published	Yes

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abstract = "As a result of toroidal rotation, sequences of new global modes are predicted to arise in magnetically confined plasmas. The frequencies of these Alfv{\'e}n modes lie inside gaps of the continuous magnetohydrodynamic (MHD) spectrum that are created or enlarged by toroidal flow. The numerically obtained results are compared with an analytical investigation, yielding a useful criterion for mode existence. Because of their low frequencies, these modes may be easily destabilized by energetic particles. Because of their sensitivity to the Mach number however, these modes can provide a valuable extension to MHD spectroscopy by giving information on the rotational velocity.",

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Low-frequency Alfvén gap modes in rotating tokamak plasmas

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