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首页> 外文期刊>Nuclear fusion >Impurity induced kinetic shear Alfven and kinetic ballooning instabilities in tokamak plasmas
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Impurity induced kinetic shear Alfven and kinetic ballooning instabilities in tokamak plasmas

机译：杂质引起的托卡马克等离子体中的动剪切Alfven和动气球膨胀不稳定性

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摘要

New electromagnetic micro-instabilities are found in magnetically confined toroidal plasmas with two ion species (main and impurity ions) from gyrokinetic simulations by means of linear analysis with the s - a equilibrium model. The instabilities are induced by impurity ion density gradient and finite β (β is the ratio of particle kinetic pressure to magnetic pressure) effect even in the absence of ion temperature gradient. The requirements of double critical impurity density gradients (one positive and one negative), finite impurity concentration and plasma β are demonstrated for the instabilities to occur. The instabilities are identified as kinetic shear Alfven type and kinetic ballooning type, respectively. They are unstable in the first and second stable regimes of the ideal MHD ballooning modes and, therefore, expected to have significant influences on plasma transport and confinement.
机译：通过带有s-平衡模型的线性分析，通过陀螺动力学模拟，在具有两种离子种类（主离子和杂质离子）的磁约束环形等离子体中发现了新的电磁微不稳定性。不稳定性是由杂质离子密度梯度引起的，即使在没有离子温度梯度的情况下，有限的β（β是粒子动压与磁压之比）效应也会引起这种不稳定性。证明了出现不稳定性的双重临界杂质浓度梯度（一正一负），有限杂质浓度和等离子体β的要求。将该不稳定性分别确定为动切变Alfven型和动膨胀型。它们在理想的MHD膨胀模式的第一和第二稳定状态中不稳定，因此，预计会对血浆运输和限制产生重大影响。

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  • 来源
    《Nuclear fusion》 |2018年第1期|014004.1-014004.6|共6页
  • 作者

    Yong Shen; J.Q. Dong; A.P. Sun; M.K. Han; H.R. Du; Z.X. Wang; H.D. He; Z.X. He; L.F. Wang; J.L. Wang;

  • 作者单位

    Southwestern Institute of Physics, Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, Chengdu 610041, People's Republic of China,Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027, People's Republic of China;

    Southwestern Institute of Physics, Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, Chengdu 610041, People's Republic of China,Key Laboratory of Materials Modification by Beams of the Ministry of Education, School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China;

    Key Laboratory of Materials Modification by Beams of the Ministry of Education, School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China;

    Key Laboratory of Materials Modification by Beams of the Ministry of Education, School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China;

    Southwestern Institute of Physics, Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, Chengdu 610041, People's Republic of China;

    Southwestern Institute of Physics, Chengdu 610041, People's Republic of China;

    Key Laboratory of Materials Modification by Beams of the Ministry of Education, School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China;

  • 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

    tokamak; impurity; kinetic shear Alfven instability; kinetic ballooning instability;

    机译：托卡马克不纯;动态剪切Alfven不稳定性;动力气球不稳定性;

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