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Title: Measurements of the eigenfunction of reversed shear Alfvén eigenmodes that sweep downward in frequency

Reversed shear Alfvén eigenmodes (RSAEs) usually sweep upward in frequency when the minimum value of the safety factor q{sub min} decreases in time. On rare occasions, RSAEs sweep downward prior to the upward sweep. Electron cyclotron emission measurements show that the radial eigenfunction during the downsweeping phase is similar to the eigenfunction of normal, upsweeping RSAEs.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. University of California Irvine, Irvine, California 92697 (United States)
  2. University of Texas at Austin, Austin, Texas 78712 (United States)
  3. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
  4. Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
  5. General Atomics, San Diego, California 92186 (United States)
Publication Date:
OSTI Identifier:
22227906
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 8; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALFVEN WAVES; ECR HEATING; EIGENFUNCTIONS; EIGENVALUES; ELECTRON TEMPERATURE; ELECTRONS; ION TEMPERATURE; PLASMA BEAM INJECTION; PLASMA CONFINEMENT; PLASMA DIAGNOSTICS; PLASMA INSTABILITY; REVERSED SHEAR; TOKAMAK DEVICES