Isotope dependence of beta-induced Alfven eigenmode (BAE) and low frequency mode (LFM) stability in DIII-D

被引：9

作者：

Heidbrink, W. W. ^{[1
]}

Choi, G. J. ^{[1
]}

Van Zeeland, M. A. ^{[2
]}

Austin, M. E. ^{[3
]}

Degrandchamp, G. H. ^{[1
]}

Spong, D. A. ^{[4
]}

Bierwage, A. ^{[5
]}

Crocker, N. A. ^{[6
]}

Du, X. D. ^{[2
]}

Lauber, P. ^{[7
]}

Lin, Z. ^{[1
]}

McKee, G. R. ^{[8
]}

机构：

[1] Univ Calif Irvine, Irvine, CA 92697 USA

[2] Gen Atom, San Diego, CA USA

[3] Univ Texas Austin, Austin, TX USA

[4] Oak Ridge Natl Lab, Oak Ridge, TN USA

[5] Rokkasho Fus Inst, Natl Inst Quantum & Radiol Sci & Technol, Aomori 0393212, Japan

[6] Univ Calif Los Angeles, Los Angeles, CA USA

[7] Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany

[8] Univ Wisconsin, Madison, WI USA

来源：

NUCLEAR FUSION | 2021年 / 61卷 / 10期

关键词：

Alfven eigenmode; fast ions; tokamak; BEAM IONS;

D O I：

10.1088/1741-4326/ac189d

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 stability of beta-induced Alfven eigenmodes (BAE) and the low frequency modes (LFMs) that were formerly called beta-induced Alfven-acoustic eigenmodes is discussed. After a brief summary of previous publications on the stability in DIII-D beam-heated, reversed-shear, deuterium plasmas with deuterium neutral beam injection (NBI), new observations in mixed hydrogen and deuterium plasmas are reported. With deuterium NBI, BAEs are at least as unstable in mixed-species plasmas as in deuterium plasmas; however, with hydrogen NBI, the BAEs are stable. In contrast, the LFMs are unaffected by changes in beam species, consistent with the previous observation that LFMs are not driven by high-energy beam ions. As predicted by theory, the LFMs appear more unstable in mixed species plasmas than in pure deuterium discharges.

引用

页数：8

共 14 条

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