Zonal flow and zonal magnetic field generation by finite β drift waves:: A theory for low to high transitions in tokamaks -: art. no. 015001
Zonal flow and zonal magnetic field generation by finite β drift waves:: A theory for low to high transitions in tokamaks -: art. no. 015001
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DOI：
10.1103/physrevlett.87.015001
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发表时间：
2001-07-02
影响因子：
8.6
通讯作者：
Kaw, PK
中科院分区：
文献类型：
--
作者：
Guzdar, PN;Kleva, RG;Kaw, PK
十多年来，对托卡马克从低到高（L-H）转变的理解一直是一个重要的研究领域。 Rogers 等人最近对 Bur 管几何结构中的抗漂移气球模式进行了 3D 有限 beta 模拟。 [物理。莱特牧师。 81； 4396 (1998)]提供了二维相空间中转变的独特参数化。该相空间中的阈值曲线与 ASDEX 和 C-MOD 数据的比较显示出非常好的一致性。在这封信中，我们提供了一个基于有限 β 等离子体中层流和层状磁场生成的简单理论，它解释了托卡马克中 L-H 跃迁的阈值曲线。
The understanding of low to high (L-H) transition in tokamaks has been an important area of investigation for more than a decade. Recent 3D finite beta simulations of drift-resistive ballooning modes in a Bur tube geometry by Rogers et al. [Phys. Rev. Lett. 81; 4396 (1998)] have provided a unique parametrization of the transition in a two-dimensional phase space. Comparison of the threshold curve in this phase space with data from ASDEX and C-MOD has shown very good agreement. In this Letter we provide a simple theory, based on the generation of zonal flow and zonal magnetic field in a finite-beta plasma, which explains this threshold curve for L-H transition in tokamaks.