Gyrokinetic simulations of the tearing instability

被引：28

作者：

Numata, Ryusuke ^{[1
,2
,3
]}

Dorland, William ^{[2
]}

Howes, Gregory G. ^{[4
]}

Loureiro, Nuno F. ^{[5
]}

Rogers, Barrett N. ^{[6
]}

Tatsuno, Tomoya ^{[2
,7
]}

机构：

[1] Univ Hyogo, Grad Sch Simulat Studies, Kobe, Hyogo 6500047, Japan

[2] Univ Maryland, Ctr Multiscale Plasma Dynam, College Pk, MD 20742 USA

[3] Univ Vienna, Wolfgang Pauli Inst, A-1090 Vienna, Austria

[4] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

[5] Univ Tecn Lisboa, Assoc EURATOM IST, Inst Plasmas & Fusao Nucl, Lab Assoc,Inst Super Tecn, P-1049001 Lisbon, Portugal

[6] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA

[7] Univ Electrocommun, Dept Commun Engn & Informat, Chofu, Tokyo 1828585, Japan

来源：

PHYSICS OF PLASMAS | 2011年 / 18卷 / 11期

关键词：

plasma collision processes; plasma kinetic theory; plasma pressure; plasma simulation; plasma temperature; plasma thermodynamics; tearing instability; NONLINEAR GROWTH;

D O I：

10.1063/1.3659035

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：

Linear gyrokinetic simulations covering the collisional-collisionless transitional regime of the tearing instability are performed. It is shown that the growth rate scaling with collisionality agrees well with that predicted by a two-fluid theory for a low plasma beta case in which ion kinetic dynamics are negligible. Electron wave-particle interactions (Landau damping), finite Larmor radius, and other kinetic effects invalidate the fluid theory in the collisionless regime, in which a general non-polytropic equation of state for pressure (temperature) perturbations should be considered. We also vary the ratio of the background ion to electron temperatures and show that the scalings expected from existing calculations can be recovered, but only in the limit of very low beta. (C) 2011 American Institute of Physics. [doi:10.1063/1.3659035]

引用

页数：6

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