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A Monte Carlo model for velocity space effects in low recycling scrape-off layer plasmas

机译:低回收刮层等离子体中速度空间效应的蒙特卡洛模型

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摘要

A Monte Carlo model solving only in velocity space is proposed to investigate a low recycling scrape-off layer (SOL) plasma. In the model, the effects of Coulomb collisions are accurately described by a non-linear Monte Carlo collision operator; a conductive heat flux into the SOL is effectively modelled via randomly exchanging the source particles and the SOL particles; secondary electrons are included. A steady state SOL plasma, which satisfies the particle and energy balances and the neutrality constraint, is determined in terms of the total particle and heat fluxes across the separatrix, the edge plasma temperature, the secondary electron emission coefficient and the SOL size. The model gives gross features of the SOL, such as plasma temperatures and densities, the total sheath potential drop and the sheath energy transmission factor. Simulations neglecting unlike collisions are performed. It is found that the potential drop and the electron energy transmission factor in collisional SOL plasmas are in close agreement with theoretical predictions. The present model primarily provides useful information about collisionless SOL plasmas that is difficult to obtain analytically.
机译:提出了仅在速度空间中求解的蒙特卡洛模型,以研究低再循环刮擦层(SOL)等离子体。在该模型中,库伦碰撞的影响由非线性蒙特卡洛碰撞算子准确描述;通过随机交换源粒子和SOL粒子,可以有效地模拟进入SOL的导热通量;包括二次电子。满足粒子和能量平衡以及中性约束条件的稳态SOL等离子体,取决于穿过分离层的总粒子和热通量,边缘等离子体温度,二次电子发射系数和SOL尺寸来确定。该模型给出了SOL的总体特征,例如血浆温度和密度,总鞘层电势下降和鞘层能量传输因子。执行忽略碰撞的模拟。发现碰撞SOL等离子体中的电势下降和电子能量传输因子与理论预测非常吻合。本模型主要提供有关无碰撞SOL等离子体的有用信息,这些信息很难通过分析获得。

著录项

  • 来源
    《Nuclear fusion》 |1996年第12期|p. 1633-1646|共14页
  • 作者单位

    Department of Fusion Science, The Graduate University of Advanced Studies, Nagoya;

    Department of Fusion Science, The Graduate University of Advanced Studies, Nagoya;

    Department of Fusion Science, The Graduate University of Advanced Studies, Nagoya;

    Department of Fusion Science, The Graduate University of Advanced Studies, Nagoya;

    Department of Fusion Science, The Graduate University of Advanced Studies, Nagoya;

  • 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 原子核物理学、高能物理学;
  • 关键词

  • 入库时间 2022-08-18 01:10:35

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