Abstract:

The transport of runaway electrons in a hot plasma can be comparatively easily measured in

steady state or perturbation experiments, which provide run away electron diffusivity Dr. The

diffusivity can be interpreted in terms of the magnetic fluctuation level. The runaway electron

diffusion coefficient is determined by internal magnetic fluctuations. The internal magnetic

fluctuations level (b_r/B_T) is estimated to be about (2~4)×10^-4 in the HL-1M plasma. The results

demonstrate the effectiveness of using runaway transport techniques for determining internal

magnetic fluctuations. A profile of the magnetic fluctuation level in the HL- 1M tokamak can be

estimated from D_r.

Key words: Transport of runaway electron, Diffusivity, Intrinsic magnetic fluctuations

摘要：

The transport of runaway electrons in a hot plasma can be comparatively easily measured in

steady state or perturbation experiments, which provide run away electron diffusivity Dr. The

diffusivity can be interpreted in terms of the magnetic fluctuation level. The runaway electron

diffusion coefficient is determined by internal magnetic fluctuations. The internal magnetic

fluctuations level (b_r/B_T) is estimated to be about (2~4)×10^-4 in the HL-1M plasma. The results

demonstrate the effectiveness of using runaway transport techniques for determining internal

magnetic fluctuations. A profile of the magnetic fluctuation level in the HL- 1M tokamak can be

estimated from D_r.

关键词: Transport of runaway electron, Diffusivity, Intrinsic magnetic fluctuations