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首页> 外文期刊>Nuclear fusion >Test particles dynamics in the JOREK 3D non-linear MHD code and application to electron transport in a disruption simulation
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Test particles dynamics in the JOREK 3D non-linear MHD code and application to electron transport in a disruption simulation

机译：在JOREK 3D非线性MHD代码中测试粒子动力学，并将其应用于破坏模拟中的电子传输

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摘要

In order to contribute to the understanding of runaway electron generation mechanisms during tokamak disruptions, a test particle tracker is introduced in the JOREK 3D non-linear MHD code, able to compute both full and guiding center relativistic orbits. Tests of the module show good conservation of the invariants of motion and consistency between full orbit and guiding center solutions. A first application is presented where test electron confinement properties are investigated in a massive gas injection-triggered disruption simulation in JET-like geometry. It is found that electron populations initialised before the thermal quench (TQ) are typically not fully deconfined in spite of the global stochasticity of the magnetic field during the TQ. The fraction of 'survivors' decreases from a few tens down to a few tenths of percent as the electron energy varies from 1 keV to 10 MeV. The underlying mechanism for electron 'survival' is the prompt reformation of closed magnetic surfaces at the plasma core and, to a smaller extent, the subsequent reappearance of a magnetic surface at the edge. It is also found that electrons are less deconfined at 10 MeV than at 1 MeV, which appears consistent with a phase averaging effect due to orbit shifts at high energy.
机译：为了有助于理解托卡马克破裂期间失控的电子生成机制，在JOREK 3D非线性MHD代码中引入了一种测试粒子跟踪器，它能够计算出完整的和相对的相对论轨道。对模块的测试表明，运动的不变性得到了很好的保留，并且在全轨道和导向中心解决方案之间保持了一致性。提出了第一个应用，其中在类似JET的几何形状的大规模气体注入触发的破坏模拟中研究了测试电子的约束性质。已发现，尽管在TQ期间磁场具有全局随机性，但在热猝灭（TQ）之前初始化的电子总体通常并未完全限定。随着电子能量从1 keV到10 MeV的变化，“幸存者”的比例从百分之几十下降到百分之几十。电子“存活”的基本机制是在等离子核处迅速重新形成闭合的磁性表面，并在较小程度上重新形成边缘的磁性表面。还发现，电子在10 MeV时比在1 MeV时更受限制，这似乎与由于高能轨道移动引起的相位平均效应相一致。

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  • 来源
    《Nuclear fusion》 |2018年第1期|016043.1-016043.12|共12页
  • 作者

    C. Sommariva; E. Nardon; P. Beyer; M. Hoelzl; G.T.A. Huijsmans; D. van Vugt;

  • 作者单位

    CEA, IRFM, F-13108, Saint Paul-lez-Durance, France;

    CEA, IRFM, F-13108, Saint Paul-lez-Durance, France;

    Aix-Marseille Universite, CNRS, PIIM UMR 7345, 13397, Marseille Cedex 20, France;

    Max-Planck Institute for Plasma Physics, Boltzmannstr. 2, 85768, Garching, Germany;

    CEA, IRFM, F-13108, Saint Paul-lez-Durance, France,Department Applied Physics, T. U. Eindhoven, PO Box 513, 5600, Eindhoven, Netherlands;

    Department Applied Physics, T. U. Eindhoven, PO Box 513, 5600, Eindhoven, Netherlands;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    runaway electrons; test particle; disruption; magnetohydrodynamics; particle tracker;

    机译：电子失控测试粒子破坏磁流体动力学;粒子追踪器;

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