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Title: Frequencies of the geodesic acoustic mode and Alfvén gap modes in high-q{sup 2}β plasmas with non-circular cross section

This work generalizes recent results [O. P. Fesenyuk et al., Plasma Phys. Controlled Fusion 54, 085014 (2012)] to plasmas with elongated cross section. It suggests new expressions for the frequencies of the geodesic acoustic mode and Alfvén gap modes in tokamaks, with a large ratio of the plasma pressure to the magnetic field pressure and a large safety factor (q≫1, which takes place in discharges with reversed-shear configuration and, especially, in hollow-current discharges)
Authors:
;  [1] ;  [1] ;  [2]
  1. Institute for Nuclear Research, Prospekt Nauky 47, Kyiv 03680 (Ukraine)
  2. (Ukraine)
Publication Date:
OSTI Identifier:
22218342
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 12; 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; BETA RATIO; GEODESICS; GLOW DISCHARGES; MAGNETIC FIELDS; PLASMA CONFINEMENT; PLASMA INSTABILITY; PLASMA PRESSURE; REVERSED SHEAR; TOKAMAK DEVICES