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Internal magnetic fluctuation in the HL-1M tokamak

Zheng Yong-Zhen Qi Chang-Wei Ding Xuan-Tong Lee Wen-Zhong

Internal magnetic fluctuation in the HL-1M tokamak

Zheng Yong-Zhen, Qi Chang-Wei, Ding Xuan-Tong, Lee Wen-Zhong
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  • Abstract views:  4065
  • PDF Downloads:  1327
  • Cited By: 0
Publishing process
  • Received Date:  29 July 2004
  • Accepted Date:  12 January 2005
  • Published Online:  20 January 2006

Internal magnetic fluctuation in the HL-1M tokamak

  • 1. 核工业西南物理研究院,成都 610041

Abstract: The transport of runaway electrons in hot plasma can be comparatively easily measured by steady state or perturbation experiments, which provide runaway electron diffusivity Dr. The runaway diffusion coefficient has been obtained using four methods: (1) Dr is deduced from Plasma shift experiment; (2) Dr is deduced from its sawteeth oscillations behaviors of HXR flux and of SXR intensity; (3) Dr is deduced from microwave radiation intensity sawtoothing behaviors; (4) Dr is deduced from hard-X-ray bremsstrahlung spectra. The diffusivity can be interpreted in terms of a magnetic fluctuation level. The internal magnetic fluctuations level (b~r/BT) is estimated to be about (2—4)×10-4 in the HL-1M plasma. The results presented here demonstrate the effectiveness of using runaway transport techniques for determining internal magnetic fluctuations. A profile of the magnetic fluctuation level in the HL-1M can be estimated from Dr.

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