Temperature ratio dependence of ion temperature gradient and trapped electron mode instability thresholds

被引：48

作者：

Casati, Alessandro ^{[1
]}

Bourdelle, C. ^{[1
]}

Garbet, X. ^{[1
]}

Imbeaux, F. ^{[1
]}

机构：

[1] Ctr Cadarache, Inst Rech Fus Confinement Magnet, CEA DSM, Assoc EURATOM CEA, F-13108 St Paul Les Durance, France

来源：

PHYSICS OF PLASMAS | 2008年 / 15卷 / 04期

关键词：

D O I：

10.1063/1.2906223

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The impact of ion to electron temperature ratio T-i/T-e on the instability thresholds of ion temperature gradient (ITG) and trapped electron modes (TEMs) is both analytically and numerically addressed. An analytical kinetic approach is developed accounting for the ion (electron, respectively) magnetic drift resonance and for the electron (ion, respectively) nonresonant response. This leads to a significant temperature ratio dependence of both ITG and TEM instability thresholds. Moreover nonresonant effects are able to reverse the scaling of ITG and TEM thresholds with T-i/T-e beyond the flat density limit. Analytical predictions are successfully tested against linear gyrokinetic thresholds and growth rates using the code KINEZERO [C. Bourdelle , Nucl. Fusion 42, 892 (2002)]. (C) 2008 American Institute of Physics.

引用

页数：11

共 50 条

[41] PRODUCTION AND IDENTIFICATION OF THE ION-TEMPERATURE-GRADIENT INSTABILITY
SEN, AK
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[42] Ion temperature gradient mode in the weak density gradient limit
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[43] Toroidal ion temperature gradient mode stability at large temperature gradients
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[46] Ion scale nonlinear interaction triggered by disparate scale electron temperature gradient mode
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