[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
1)
Kyoto University, Kyoto 615-8540, Japan
(Received 26 November 2014 / Accepted 30 December 2014 / Published 30 January 2015)

Abstract

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.


Keywords

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

DOI: 10.1585/pfr.10.1203006


References

  • [1] H.M. Smith and E. Verwichte, Phys. Plasmas 15, 072502 (2008).
  • [2] T. Fehér et al., Plasma Phys. Control. Fusion 53, 035014 (2011).
  • [3] J.W. Conner and R.J. Hastie, Nucl. Fusion 15, 415 (1975).
  • [4] C.F.F. Karney, Computer Physics Report 4, 183 (1986).
  • [5] M.N. Rosenbluth and S.V. Putvinski, Nucl. Fusion 37, 1355 (1997).
  • [6] S.C. Chiu et al., Nucl. Fusion 38, 1711 (1998).

This paper may be cited as follows:

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