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Title: Energetic particle destabilization of shear Alfven waves in stellarators and tokamaks

Abstract

An important issue for ignited devices is the resonant destabilization of shear Alfven waves by energetic populations. These instabilities have been observed in a variety of toroidal plasma experiments in recent years, including: beam-destabilized toroidal Alfven instabilities (TAE) in low magnetic field tokamaks, ICRF destabilized TAE`s in higher field tokamaks, and global Alfven instabilities (GAE) in low shear stellarators. In addition, excitation and study of these modes is a significant goal of the TFIR-DT program and a component of the ITER physics tasks. The authors have developed a gyrofluid model which includes the wave-particle resonances necessary to excite such instabilities. The TAE linear mode structure is calculated nonperturbatively, including many of the relevant damping mechanisms, such as: continuum damping, non-ideal effects (ion FLR and electron collisionality), and ion/electron Landau damping. This model has been applied to both linear and nonlinear regimes for a range of experimental cases using measured profiles.

Authors:
; ; ;  [1];  [2]
  1. Oak Ridge National Lab., TN (United States)
  2. Max-Planck-Inst. fuer Plasmaphysik, Garching (Germany). IPP-EURATOM-Association
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10116946
Report Number(s):
CONF-940933-26; IAEA-CN-60/D-P-II-3
ON: DE95006393;; TRN: AHC29508%%178
DOE Contract Number:  
AC05-84OR21400
Resource Type:
Technical Report
Resource Relation:
Conference: 15. international conference on plasma physics and controlled nuclear fusion research,Madrid (Spain),26 Sep - 1 Oct 1994; Other Information: PBD: [1994]
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TOKAMAK DEVICES; ALFVEN WAVES; PLASMA INSTABILITY; STELLARATORS; PLASMA SIMULATION; TFTR TOKAMAK; ITER TOKAMAK; INSTABILITY GROWTH RATES; THEORETICAL DATA; 700340; PLASMA WAVES, OSCILLATIONS, AND INSTABILITIES

Citation Formats

Spong, D A, Carreras, B A, Hedrick, C L, Leboeuf, J N, and Weller, A. Energetic particle destabilization of shear Alfven waves in stellarators and tokamaks. United States: N. p., 1994. Web. doi:10.2172/10116946.
Spong, D A, Carreras, B A, Hedrick, C L, Leboeuf, J N, & Weller, A. Energetic particle destabilization of shear Alfven waves in stellarators and tokamaks. United States. https://doi.org/10.2172/10116946
Spong, D A, Carreras, B A, Hedrick, C L, Leboeuf, J N, and Weller, A. 1994. "Energetic particle destabilization of shear Alfven waves in stellarators and tokamaks". United States. https://doi.org/10.2172/10116946. https://www.osti.gov/servlets/purl/10116946.
@article{osti_10116946,
title = {Energetic particle destabilization of shear Alfven waves in stellarators and tokamaks},
author = {Spong, D A and Carreras, B A and Hedrick, C L and Leboeuf, J N and Weller, A},
abstractNote = {An important issue for ignited devices is the resonant destabilization of shear Alfven waves by energetic populations. These instabilities have been observed in a variety of toroidal plasma experiments in recent years, including: beam-destabilized toroidal Alfven instabilities (TAE) in low magnetic field tokamaks, ICRF destabilized TAE`s in higher field tokamaks, and global Alfven instabilities (GAE) in low shear stellarators. In addition, excitation and study of these modes is a significant goal of the TFIR-DT program and a component of the ITER physics tasks. The authors have developed a gyrofluid model which includes the wave-particle resonances necessary to excite such instabilities. The TAE linear mode structure is calculated nonperturbatively, including many of the relevant damping mechanisms, such as: continuum damping, non-ideal effects (ion FLR and electron collisionality), and ion/electron Landau damping. This model has been applied to both linear and nonlinear regimes for a range of experimental cases using measured profiles.},
doi = {10.2172/10116946},
url = {https://www.osti.gov/biblio/10116946}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {12}
}