Finite pressure effects on reversed shear Alfvén eigenmodes

G. J. Kramer, N. N. Gorelenkov, R. Naziklan, C. Z. Cheng

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

The inclusion of finite pressure in ideal magnetohydrodynamic theory can explain the reversed magnetic shear Alfvén eigenmodes (RSAE) (or Alfvén cascades) that have been observed in several large tokamaks without the need to invoke an energetic particle mechanism for the existence of these modes. The chirping of the RSAE is caused by changes in the minimum of the magnetic safety factor, qmin, while finite pressure effects explain the observed non-zero minimum frequency of the RSAE when qmin has a rational value. Finite pressure effects also play a dominant role in the existence of the downward chirping RSAE branch.

Original languageEnglish
Pages (from-to)L23-L29
JournalPlasma Physics and Controlled Fusion
Volume46
Issue number11
DOIs
Publication statusPublished - 2004 Nov

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

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