Toroidal microinstability studies of high-temperature tokamaks

G. Rewoldt; W. M. Tang

doi:10.1063/1.859320

Toroidal microinstability studies of high-temperature tokamaks

G. Rewoldt, W. M. Tang

PPPL Computational Science

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88 Scopus citations

Abstract

Results from comprehensive kinetic microinstability calculations are presented, showing the effects of toroidicity on the ion temperature gradient mode and its relationship to the trapped-electron mode in high-temperature tokamak plasmas. The corresponding particle and energy fluxes have also been computed. It is found that, although drift-type microinstabilities persist over a wide range of values of the ion temperature gradient parameter η_l ≡ (d ln Τ_l/dr)/ (d ln n_i/dr), the characteristic features of the dominant mode are those of the η_i-type instability when η_i> η_ic ∼ 1.2-1.4 and of the trapped-electron mode when η_i, < η_ic.

Original language	English (US)
Pages (from-to)	318-323
Number of pages	6
Journal	Physics of Fluids B
Volume	2
Issue number	2
DOIs	https://doi.org/10.1063/1.859320
State	Published - 1990

All Science Journal Classification (ASJC) codes

Computational Mechanics
Condensed Matter Physics
Mechanics of Materials
General Physics and Astronomy
Fluid Flow and Transfer Processes

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10.1063/1.859320

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abstract = "Results from comprehensive kinetic microinstability calculations are presented, showing the effects of toroidicity on the ion temperature gradient mode and its relationship to the trapped-electron mode in high-temperature tokamak plasmas. The corresponding particle and energy fluxes have also been computed. It is found that, although drift-type microinstabilities persist over a wide range of values of the ion temperature gradient parameter ηl ≡ (d ln Τl/dr)/ (d ln ni/dr), the characteristic features of the dominant mode are those of the ηi-type instability when ηi> ηic ∼ 1.2-1.4 and of the trapped-electron mode when ηi, < ηic.",

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AU - Rewoldt, G.

AU - Tang, W. M.

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N2 - Results from comprehensive kinetic microinstability calculations are presented, showing the effects of toroidicity on the ion temperature gradient mode and its relationship to the trapped-electron mode in high-temperature tokamak plasmas. The corresponding particle and energy fluxes have also been computed. It is found that, although drift-type microinstabilities persist over a wide range of values of the ion temperature gradient parameter ηl ≡ (d ln Τl/dr)/ (d ln ni/dr), the characteristic features of the dominant mode are those of the ηi-type instability when ηi> ηic ∼ 1.2-1.4 and of the trapped-electron mode when ηi, < ηic.

AB - Results from comprehensive kinetic microinstability calculations are presented, showing the effects of toroidicity on the ion temperature gradient mode and its relationship to the trapped-electron mode in high-temperature tokamak plasmas. The corresponding particle and energy fluxes have also been computed. It is found that, although drift-type microinstabilities persist over a wide range of values of the ion temperature gradient parameter ηl ≡ (d ln Τl/dr)/ (d ln ni/dr), the characteristic features of the dominant mode are those of the ηi-type instability when ηi> ηic ∼ 1.2-1.4 and of the trapped-electron mode when ηi, < ηic.

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EP - 323

JO - Physics of Fluids B

JF - Physics of Fluids B

IS - 2

ER -

Toroidal microinstability studies of high-temperature tokamaks

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