Geodesic acoustic mode in anisotropic plasma with heat flux

Geodesic acoustic mode in anisotropic plasma with heat flux
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具有热通量的各向异性等离子体中的测地声学模式

DOI:
10.1063/1.4932998
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发表时间:
2015-10
期刊:
影响因子:
2.2
通讯作者:
Ren, Haijun
Ren, Haijun
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Ren, Haijun

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在流体近似下研究了各向异性托卡马克等离子体中的测地声模。无碰撞各向异性等离子体中描述的16动量磁流体力学(MHD)流体封闭模型,它不仅考虑到压力各向异性,但也各向异性的热通量。结果表明,GAM模型的频率与动力学结果的吻合程度要优于标准的Chew-Goldberger-Low(CGL)MHD模型。当各向异性归零时,16-动量结果与动力学结果在1/q ~ 2量级上一致,而CGL结果仅在首阶上与动力学结果一致。通过在流体近似中考虑热流效应,很好地消除了CGL流体模型与动力学理论计算结果之间的差异。
Geodesic acoustic mode (GAM) in an anisotropic tokamak plasma is investigated in fluid approximation. The collisionless anisotropic plasma is described within the 16-momentum magnetohydrodynamic (MHD) fluid closure model, which takes into account not only the pressure anisotropy but also the anisotropic heat flux. It is shown that the GAM frequency agrees better with the kinetic result than the standard Chew-Goldberger-Low (CGL) MHD model. When zeroing the anisotropy, the 16-momentum result is identical with the kinetic one to the order of 1/q2, while the CGL result agrees with the kinetic result only on the leading order. The discrepancies between the results of the CGL fluid model and the kinetic theory are well removed by considering the heat flux effect in the fluid approximation.
具有各向异性离子分布的等离子体中测地声波模式的磁分量
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