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Determination of q during sawtooth from inverse evolution of BAEs in Tore Supra

机译:从Tore Supra中BAE的逆演化确定锯齿中的q

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摘要

Measuring the value of the safety factor (q) in the core during sawtooth cycles is still an open issue. A new method to measure q in Tore Supra plasma core is presented here. It relies on the analysis of the time evolution of a set of MHD modes detected after the sawtooth crashes. These modes are in the frequency range of previously observed Beta-induced Alfven Eigenmodes, but with a frequency declining in time. The mode frequency analysis shows that the q profile is reversed when we have ICRH, after the sawtooth crash. In high current discharges (I_p > 1.15 MA), the q-profile remains reversed for a longer time compared with lower plasma current discharges. Non-linear 3D MHD simulations of sawteeth performed with the XTOR-2F code (Liitjens and Luciani 2010 J. Comput. Phys. 229 8130-43) exhibit features that are similar to these observations.
机译:在锯齿周期内测量铁心中安全系数(q)的值仍然是一个未解决的问题。本文介绍了一种测量Tore Supra等离子体核心中q的新方法。它依赖于对锯齿碰撞后检测到的一组MHD模式的时间演变的分析。这些模式处于先前观察到的Beta诱导Alfven本征模式的频率范围内,但频率随时间下降。模态频率分析表明,锯齿形碰撞后,当我们有ICRH时,q分布是相反的。在高电流放电(I_p> 1.15 MA)中,与较低的等离子体电流放电相比,q曲线保持反向的时间更长。用XTOR-2F代码执行的锯齿的非线性3D MHD模拟(Liitjens和Luciani 2010 J. Comput。Phys。229 8130-43)表现出与这些观察结果相似的特征。

著录项

  • 来源
    《Nuclear fusion》 |2018年第1期|016010.1-016010.8|共8页
  • 作者单位

    Departamento de Ciencias da Natureza, Universidade Tecnologica Federal do Parana, 86300-000, Cornelio Proc6pio, Parana, Brazil,CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France;

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

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

    Institute of Physics, University of Sao Paulo, 05508-090 Sao Paulo, Sao Paulo, Brazil;

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

  • 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

    magnetohydrodynamic waves; reflectometry; q profile measurement;

    机译:磁流体动力波;反射法q轮廓测量;

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