无碰撞环形等离子体中微撕裂模式的陀螺动散布关系

IF 2.1 3区物理与天体物理 Q2 PHYSICS, FLUIDS & PLASMAS

Journal of Plasma Physics Pub Date : 2024-03-21 DOI:10.1017/s0022377824000175

B.D.G. Chandran, A.A. Schekochihin

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引用次数: 0

摘要

我们求解了线性化陀螺动能方程、类中性条件和安培定律，从而得到了无碰撞低$\beta$环形等离子体中微撕裂模式（MTMs）的弥散关系。与过去的研究相一致，我们发现电子温度梯度会导致 MTMs 不稳定，而这种不稳定驱动力是由磁漂移介导的。我们推导出的弥散关系可以非常快速地进行数值评估，并可能被证明有助于制定策略来缓解核聚变装置中的 MTM 不稳定性。

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The gyrokinetic dispersion relation of microtearing modes in collisionless toroidal plasmas

We solve the linearized gyrokinetic equation, quasineutrality condition and Ampere's law to obtain the dispersion relation of microtearing modes (MTMs) in collisionless low-

$\beta$

toroidal plasmas. Consistent with past studies, we find that MTMs are driven unstable by the electron temperature gradient and that this instability drive is mediated by magnetic drifts. The dispersion relation that we derive can be evaluated numerically very quickly and may prove useful for devising strategies to mitigate MTM instability in fusion devices.

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来源期刊

Journal of Plasma Physics 物理-物理：流体与等离子体

CiteScore

3.50

自引率

16.00%

发文量

106

审稿时长

6-12 weeks

期刊介绍： JPP aspires to be the intellectual home of those who think of plasma physics as a fundamental discipline. The journal focuses on publishing research on laboratory plasmas (including magnetically confined and inertial fusion plasmas), space physics and plasma astrophysics that takes advantage of the rapid ongoing progress in instrumentation and computing to advance fundamental understanding of multiscale plasma physics. The Journal welcomes submissions of analytical, numerical, observational and experimental work: both original research and tutorial- or review-style papers, as well as proposals for its Lecture Notes series.