Internal kink mode stabilization and the properties of auxiliary heated ions
Internal kink mode stabilization and the properties of auxiliary heated ions
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DOI：
10.1063/1.2046848
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发表时间：
2005-09
影响因子：
2.2
通讯作者：
J. Graves
中科院分区：
文献类型：
--
作者：
J. Graves
根据辅助加热离子的基本性质，分析了内扭结模的稳定性。聚变产生的α粒子和辅助加热离子之间的根本区别在于后者通常是各向异性分布的。各向异性的影响，这是通常被忽略的混合动力学-磁流体动力学代码的流体贡献，提供了一个稳定的效果，人口有一个大的通过分数。如果分布在v（平行于）上是不对称的，例如对于不平衡的束离子种群，则对内部扭结模式稳定性的影响被关键的有限轨道效应进一步修改。此外，这种加热方案将动量转移到背景等离子体，从而特别地修改热离子的动力学响应。相反，具有大的截留分数的各向异性分布引起改进的动力学稳定性，但以增加流体不稳定性为代价，这部分是由于各向异性对平衡的影响。(C)2005年美国物理学会。
The stability of the internal kink mode is analyzed in terms of the essential properties of auxiliary heated ions. A fundamental difference between fusion born alpha particles and auxiliary heated ions is that the latter are typically anisotropically distributed. The effect of anisotropy, which is usually ignored in the fluid contribution of hybrid kinetic-magnetohydrodynamic codes, provides a stabilizing effect for populations that have a large passing fraction. The effect on internal kink mode stability is further modified by crucial finite orbit effects if the distribution is asymmetric in v(parallel to), such as for unbalanced beam ion populations. Additionally, such heating scenarios transfer momentum to the background plasma thereby especially modifying the kinetic response of thermal ions. In contrast, anisotropic distributions with large trapped fractions incur improved kinetic stability, but at the cost of increased fluid instability, which is partially due to the effect of anisotropy on the equilibrium. (C) 2005 American Institute of Physics.