The effect of an anisotropic pressure of thermal particles on resistive wall mode stability
The effect of an anisotropic pressure of thermal particles on resistive wall mode stability
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DOI：
10.1063/1.4901568
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发表时间：
2014-11
影响因子：
2.2
通讯作者：
J. Berkery;R. Betti;S. Sabbagh;L. Guazzotto;J. Manickam
中科院分区：
文献类型：
--
作者：
J. Berkery;R. Betti;S. Sabbagh;L. Guazzotto;J. Manickam
热粒子各向异性压力对托卡马克聚变等离子体中电阻壁模式稳定性的影响是通过动力学理论导出的，并通过 MISK 代码的计算进行评估[B.胡等人，物理学。等离子体 12, 0 57301 (2005)]。流体各向异性被视为对等离子体平衡的小扰动，并使用双麦克斯韦分布函数进行建模。除了对流体项的各向异性校正之外，不假设高频模式旋转的完整稳定性处理还会导致色散关系中的各向异性动力学项。在密度和平均压力保持恒定的情况下，当热粒子垂直于磁场的温度高于平行于磁场的温度时，流体压力驱动的膨胀不稳定项会减少。此外，可以增强捕获的热离子的稳定动力学效应。这两种效应一起可以导致电阻壁模式稳定性的适度增加。
The effect of an anisotropic pressure of thermal particles on resistive wall mode stability in tokamak fusion plasmas is derived through kinetic theory and assessed through calculation with the MISK code [B. Hu et al., Phys. Plasmas 12, 0 57301 (2005)]. The fluid anisotropy is treated as a small perturbation on the plasma equilibrium and modeled with a bi-Maxwellian distribution function. A complete stability treatment without an assumption of high frequency mode rotation leads to anisotropic kinetic terms in the dispersion relation in addition to anisotropy corrections to the fluid terms. With the density and the average pressure kept constant, when thermal particles have a higher temperature perpendicular to the magnetic field than parallel, the fluid pressure-driven ballooning destabilization term is reduced. Additionally, the stabilizing kinetic effects of the trapped thermal ions can be enhanced. Together these two effects can lead to a modest increase in resistive wall mode stability.