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Report No.

Fokker-Planck simulation of runaway electron generation in tokamak disruptions

Nuga, Hideo; Matsuyama, Akinobu; Yagi, Masatoshi; Fukuyama, Atsushi*

The runaway electron generation during tokamak disruptions is investigated by kinetic simulations. Three dimensional Fokker-Planck simulations (2D in momentum space and 1D in radial direction) are carried out with various values of $$tau_q$$ and the results are compared with the previous simulation results that use runaway generation rate derived by Conner and Hastie. From the simulation results, It is pointed out that the importance of the hot-tail effect for the description of the runaway electron generation mechanism with fast thermal quench.



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