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首页> 外文期刊>Nuclear fusion >Tokamak startup using outboard current injection on the Pegasus Toroidal Experiment
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Tokamak startup using outboard current injection on the Pegasus Toroidal Experiment

机译：在Pegasus环形实验中使用舷外电流注入进行Tokamak启动

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摘要

Localized current injection near the outboard midplane is used to form 0.1 MA plasma discharges with no induction supplied from a central solenoid in the ultra-low aspect ratio Pegasus Toroidal Experiment. The discharges are initiated by driving open-field-line currents that perturb the vacuum magnetic field such that the magnetic topology transitions to a tokamak-like configuration. The plasma is subsequently driven via helicity injection from the edge current sources and poloidal field induction. Intermittent n = 1 MHD activity is observed during periods of strong edge current drive and each event leads to a rapid inward expansion of the plasma volume and a drop in the plasma inductance. The plasmas are sufficiently turbulent such that the equilibrium approaches the lowest energy state described by Taylor relaxation theory. In agreement with that theory, the maximum I_p scales with (I_(TF)I_(inj)/w)1/2, where I_(tf) is the toroidal field rod current, I_(inj) is the injected edge current and w is the radial width of the average poloidal magnetic flux in the driven open flux region.
机译：在超低宽高比的Pegasus环形实验中，使用外侧中平面附近的局部电流注入来形成0.1 MA的等离子体放电，而没有来自中央螺线管的感应。通过驱动扰动真空磁场的开场线电流来启动放电，从而使磁拓扑转变为托卡马克式构造。随后通过来自边缘电流源的螺旋注入和极化电场感应驱动等离子体。在强边沿电流驱动期间会观察到间歇性的n = 1 MHD活动，每次事件都会导致等离子体积迅速向内膨胀以及等离子电感下降。等离子体具有足够的湍流，因此平衡接近泰勒弛豫理论描述的最低能量状态。与该理论相一致，最大I_p的缩放比例为（I_（TF）I_（inj）/ w）1/2，其中I_（tf）是环形场棒电流，I_（inj）是注入的边沿电流，w是驱动的开放磁通量区域中平均极向磁通量的径向宽度。

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  • 来源
    《Nuclear fusion》 |2011年第7期|p.31.1-31.10|共10页
  • 作者

    D.J. Battaglia; M.W. Bongard; R.J. Fonck; A.J. Redd;

  • 作者单位

    Department of Engineering Physics, University of Wisconsin, 1500 Engineering Drive,Madison, WI 53706, USA;

    Department of Engineering Physics, University of Wisconsin, 1500 Engineering Drive,Madison, WI 53706, USA;

    Department of Engineering Physics, University of Wisconsin, 1500 Engineering Drive,Madison, WI 53706, USA;

    Department of Engineering Physics, University of Wisconsin, 1500 Engineering Drive,Madison, WI 53706, 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);
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  • 正文语种 eng
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