L-mode confinement model based on transport-MHD theory in tokamaks

L-mode confinement model based on transport-MHD theory in tokamaks
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托卡马克中基于输运MHD理论的L模约束模型

DOI:
10.1088/0741-3335/35/5/001
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发表时间:
1992
影响因子:
2.2
通讯作者:
M. Azumi
M. Azumi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
K. Itoh;M. Yagi;S. Itoh;A. Fukuyama;M. Azumi

文献摘要

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托卡马克中的 L 模式约束理论是基于微观气球不稳定性而发展的,该不稳定性由于低于理想 MHD 不稳定性的临界压力梯度的等离子体传输而不稳定。分析了电流扩散率造成的不稳定以及热传输和离子粘度造成的稳定。最不稳定的模式决定了异常传输系数。推导出热传输系数的公式,解释了 L 模式约束的主要实验观察结果。
A theory of the L-mode confinement in tokamaks is developed based on the microscopic ballooning instability which is destabilized by the plasma transport below the critical pressure gradient against the ideal MHD instability. Destabilization by the current diffusivity and stabilization by the thermal transport and ion viscosity are analysed. The least stable mode determines the anomalous transport coefficients. The formula of the thermal transport coefficient is derived, which explains major experimental observations on L-mode confinement.