CASTOR3D: linear stability studies for 2D and 3D tokamak equilibria
CASTOR3D: linear stability studies for 2D and 3D tokamak equilibria
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CASTOR3D：2D 和 3D 托卡马克平衡的线性稳定性研究
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
S. Günter
中科院分区：
文献类型：
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作者：
E. Strumberger;S. Günter
目前正在开发的 CASTOR3D 代码能够在存在理想和电阻壁结构和线圈的情况下执行 2D 和 3D、理想和电阻托卡马克平衡的线性稳定性研究。对于这些计算，由同心嵌套通量表面表示的理想平衡用作输入（例如使用 NEMEC 代码计算）。为了解决扩展特征值问题，CASTOR3D 代码同时考虑了等离子体惯性和壁电阻率。该代码是 CASTOR_3DW 稳定性代码和 STARWALL 代码的混合体。前者分别是 CASTOR 和 CASTOR_FLOW 代码的扩展版本。后者是一个线性 3D 代码，用于计算存在多重连接壁结构时电阻壁模式的增长率。 CASTOR_3DW 代码和 STARWALL 代码的某些部分已重新表述为通用 3D 通量坐标表示形式，允许在各种类型的通量坐标之间进行选择。此外，STARWALL 部分中实现的多值电流势允许正确处理 m = 0、n = 0 扰动。在本文中，我们概述了理论概念，并提出了一些数值结果，这些结果说明了代码的现状并证明了其众多的应用可能性。
The CASTOR3D code, which is currently under development, is able to perform linear stability studies for 2D and 3D, ideal and resistive tokamak equilibria in the presence of ideal and resistive wall structures and coils. For these computations ideal equilibria represented by concentric nested flux surfaces serve as input (e.g. computed with the NEMEC code). Solving an extended eigenvalue problem, the CASTOR3D code takes simultaneously plasma inertia and wall resistivity into account. The code is a hybrid of the CASTOR_3DW stability code and the STARWALL code. The former is an extended version of the CASTOR and CASTOR_FLOW code, respectively. The latter is a linear 3D code computing the growth rates of resistive wall modes in the presence of multiply-connected wall structures. The CASTOR_3DW code, and some parts of the STARWALL code have been reformulated in a general 3D flux coordinate representation that allows to choose between various types of flux coordinates. Furthermore, the implemented many-valued current potentials in the STARWALL part allow a correct treatment of the m = 0, n = 0 perturbation. In this paper, we outline the theoretical concept, and present some numerical results which illustrate the present status of the code and demonstrate its numerous application possibilities.