Implementation of matrix compression in the coupling of JOREK to realistic 3D conducting wall structures

IF 2.1 2区物理与天体物理 Q2 PHYSICS, FLUIDS & PLASMAS

Plasma Physics and Controlled Fusion Pub Date : 2024-09-02 DOI:10.1088/1361-6587/ad728a

F Cipolletta, N Schwarz, M Hoelzl, S Ventre, N Isernia, G Rubinacci, A Soba, M J Mantsinen, the JOREK Team7

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引用次数: 0

Abstract

JOREK is an advanced non-linear simulation code for studying MHD instabilities in magnetically confined fusion plasmas and their control and/or mitigation. A free-boundary and resistive wall extension was introduced via coupling to the STARWALL and CARIDDI codes, both able to provide dense response matrices describing the electromagnetic interactions between plasma and conducting structures. For detailed CAD representations of the conducting structures and high resolutions for the plasma region, memory and computing time limitations restrict the possibility of simulating the ITER tokamak. In the present work, the Singular Value Decomposition provided by routines from the ScaLAPACK library has been successfully applied to compress some of the dense response matrices and thus optimize memory usage. This is demonstrated for simulations of Tearing Mode and Vertical Displacement Event instabilities. An outlook to future applications on large production cases and further extensions of the method are discussed.

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在 JOREK 与现实三维导电墙结构的耦合中实施矩阵压缩

JOREK 是一种先进的非线性模拟代码，用于研究磁约束聚变等离子体中的 MHD 不稳定性及其控制和/或缓解。通过与 STARWALL 和 CARIDDI 代码的耦合，引入了自由边界和电阻壁扩展，这两种代码都能够提供密集的响应矩阵，描述等离子体和导电结构之间的电磁相互作用。对于导电结构的详细 CAD 表示和等离子体区域的高分辨率，内存和计算时间限制了模拟热核实验堆托卡马克的可能性。在本研究中，ScaLAPACK 库中的例程提供的奇异值分解功能已成功应用于压缩某些密集响应矩阵，从而优化了内存使用。这在撕裂模式和垂直位移事件不稳定性模拟中得到了验证。本文还讨论了未来在大型生产案例中的应用前景以及该方法的进一步扩展。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plasma Physics and Controlled Fusion 物理-物理：核物理

CiteScore

4.50

自引率

13.60%

发文量

224

审稿时长

4.5 months

期刊介绍： Plasma Physics and Controlled Fusion covers all aspects of the physics of hot, highly ionised plasmas. This includes results of current experimental and theoretical research on all aspects of the physics of high-temperature plasmas and of controlled nuclear fusion, including the basic phenomena in highly-ionised gases in the laboratory, in the ionosphere and in space, in magnetic-confinement and inertial-confinement fusion as well as related diagnostic methods. Papers with a technological emphasis, for example in such topics as plasma control, fusion technology and diagnostics, are welcomed when the plasma physics is an integral part of the paper or when the technology is unique to plasma applications or new to the field of plasma physics. Papers on dusty plasma physics are welcome when there is a clear relevance to fusion.