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Stabilization of collisionless trapped particle modes in tokamaks

Phys. Fluids B 2, 2151 (1990); doi:10.1063/1.859435

Issue Date: September 1990

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R. R. Dominguez
General Atomics, San Diego, California 92186-9784
A quadratic form is derived to study the stability of collisionless trapped particle modes in tokamaks. Marginal stability criteria show that stability can be obtained by controlling the electron temperature profile. In a low aspect ratio equilibrium (such as the recently proposed Comet [Comments Plasma Phys. XII, 125 (1989)]), the stability requirement is etae[approximately-equal-to]O(1) (etae=[partial-derivative] ln Te/[partial-derivative] ln ne); in a standard large aspect ratio tokamak with a broad density profile, the requirement is LTe/R[approximately-equal-to]O(1) (L<sup> - 1</sup><sub>T[sub e]</sub>=−[partial-derivative]ln Te/[partial-derivative]r). Possible application of the second scenario to H-mode plasmas is noted. Physics of Fluids B: Plasma Physics is copyrighted by The American Institute of Physics.
History: Received 23 May 1989; accepted 18 May 1990
Permalink: http://dx.doi.org/10.1063/1.859435
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KEYWORDS and PACS

Keywords
PACS
  • 52.35.Py
    The physics of plasmas and electric discharges Waves, oscillations, and instabilities in plasma Plasma macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, RayleighTaylor)
  • 52.55.Fa
    The physics of plasmas and electric discharges Plasma equilibrium and confinement Tokamaks
  • YEAR: 1990

PUBLICATION DATA

ISSN:
0899-8221 (print)   1089-7674 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (18)
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