[Table of Contents]

Plasma and Fusion Research

Volume 10, 1203006 (2015)

Rapid Communications

Fokker-Planck Simulation of Runaway Electron Generation in Tokamak Disruptions
Hideo NUGA, Akinobu MATSUYAMA, Masatoshi YAGI and Atsushi FUKUYAMA1)
Japan Atomic Energy Agency, Aomori 039-3212, Japan
Kyoto University, Kyoto 615-8540, Japan
(Received 26 November 2014 / Accepted 30 December 2014 / Published 30 January 2015)


The runaway electron (RE) generation during tokamak disruptions is investigated by kinetic simulations. Specifically, three dimensional (two-dimensional in momentum space; one-dimensional in the radial direction) Fokker-Planck simulations are coupled with the self-consistent electric field caused by the disruptions. The thermal quench time is varied, and the results are compared with those of the steady-state solution of the RE generation rate. The hot-tail effect is enhanced when the thermal quench time is shorter than the electron slowing down time.


runaway electron, tokamak disruption, Fokker-Planck simulation, induced toroidal field

DOI: 10.1585/pfr.10.1203006


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This paper may be cited as follows:

Hideo NUGA, Akinobu MATSUYAMA, Masatoshi YAGI and Atsushi FUKUYAMA, Plasma Fusion Res. 10, 1203006 (2015).