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Feedback control of the proximity to marginal RWM stability using active MHD spectroscopy

机译:使用有源MHD光谱仪对接近极限RWM稳定性的反馈控制

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摘要

DⅢ-D experiments yield the first proof-of-principle results in feedback control of the proximity to the resistive wall mode (RWM) stability boundary using an active MHD spectroscopic stability measurement and neutral beam injection heating. In contrast to calculations of the stability of reconstructed equilibria, the spectroscopic measurement is independent of the assumed RWM stability model. The real-time implementation enables the control system to react to unforeseen changes in plasma parameters and hence stability limits. In the experimentally accessed regime, near but below the ideal-MHD no-wall limit for the n = 1 external kink instability, the control dynamics are described by a linear model that depends on the plasma stored energy. This model is used to aid in optimizing feedback gain settings.
机译:DⅢ-D实验通过使用主动MHD光谱稳定性测量和中性束注入加热,在对电阻壁模式(RWM)稳定性边界附近的反馈控制中产生了第一个原理证明。与重建平衡的稳定性计算相反,光谱测量与假设的RWM稳定性模型无关。实时实现使控制系统能够对血浆参数的意外变化做出反应,从而对稳定性极限做出反应。在实验获得的状态下,对于n = 1外部扭结不稳定性,理想的MHD无壁极限接近但低于理想的MHD无壁极限,控制动力学由依赖于等离子体存储能量的线性模型描述。该模型用于帮助优化反馈增益设置。

著录项

  • 来源
    《Nuclear fusion》 |2012年第1期|p.013003.1-013003.7|共7页
  • 作者单位

    Department of Applied Physics and Applied Mathematics, Columbia University, 2960 Broadway, New York, NY 10027-6900, USA,Oak Ridge Institute for Science Education, Oak Ridge, TN 37830-8050, USA;

    Department of Applied Physics and Applied Mathematics, Columbia University, 2960 Broadway, New York, NY 10027-6900, USA;

    Department of Applied Physics and Applied Mathematics, Columbia University, 2960 Broadway, New York, NY 10027-6900, USA;

    FAR-TECH, Inc., 10350 Science Center Dr.. San Diego, CA 92121 -1 136, USA;

    General Atomics, PO Box 85608, San Diego, CA 92186-5608, USA;

    General Atomics, PO Box 85608, San Diego, CA 92186-5608, USA;

    Department of Applied Physics and Applied Mathematics, Columbia University, 2960 Broadway, New York, NY 10027-6900, USA;

    Princeton Plasma Physics Laboratory, PO Box 451, Princeton. NJ 08543-0451, USA;

    General Atomics, PO Box 85608, San Diego, CA 92186-5608, USA;

    General Atomics, PO Box 85608, San Diego, CA 92186-5608, USA;

  • 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
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