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Post-disruptive runaway electron beam in COMPASS Tokamak

Milos Vlainic (UGent) , Jan Mlynar, Jordan Cavalier, Vladimir Weinzettl, Richard Paprok, Martin Imrisek, Ondrej Ficker, Mykyta Varavin, Petr Vondracek and Jean-Marie Noterdaeme (UGent)
(2015) JOURNAL OF PLASMA PHYSICS. 81(5).
Author
Organization
Abstract
For ITER-relevant runaway electron studies, such as suppression, mitigation, termination and/or control of runaway beam, obtaining the runaway electrons after the disruption is important. In this paper we report on the first achieved discharges with post-disruptive runaway electron beam, entitled “runaway plateau”, in the COMPASS tokamak. The runaway plateau is produced by massive gas injection of argon. Almost all of the disruptions with runaway electron plateaus occurred during the plasma current ramp-up phase. Comparison between the Ar injection discharges with and without plateau has been done for various parameters. Parametrisation of the discharges shows that COMPASS disruptions fulfill the range of parameters important for the runaway plateau occurrence. These parameters include electron density, electric field, disruption speed, effective safety factor, maximum current quench electric field. In addition to these typical parameters, the plasma current value just before the massive gas injection surprisingly proved to be important.
Keywords
Runaway Electrons, FULLY IONIZED GAS, Massive Gas Injection, Disruption in Tokamaks, ION RUNAWAY, UPGRADE, JET

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MLA
Vlainic, Milos et al. “Post-disruptive Runaway Electron Beam in COMPASS Tokamak.” Ed. Tunde Fulop & Alexander Robinson. JOURNAL OF PLASMA PHYSICS 81.5 (2015): n. pag. Print.
APA
Vlainic, M., Mlynar, J., Cavalier, J., Weinzettl, V., Paprok, R., Imrisek, M., Ficker, O., et al. (2015). Post-disruptive runaway electron beam in COMPASS Tokamak. (T. Fulop & A. Robinson, Eds.)JOURNAL OF PLASMA PHYSICS, 81(5).
Chicago author-date
Vlainic, Milos, Jan Mlynar, Jordan Cavalier, Vladimir Weinzettl, Richard Paprok, Martin Imrisek, Ondrej Ficker, Mykyta Varavin, Petr Vondracek, and Jean-Marie Noterdaeme. 2015. “Post-disruptive Runaway Electron Beam in COMPASS Tokamak.” Ed. Tunde Fulop and Alexander Robinson. Journal of Plasma Physics 81 (5).
Chicago author-date (all authors)
Vlainic, Milos, Jan Mlynar, Jordan Cavalier, Vladimir Weinzettl, Richard Paprok, Martin Imrisek, Ondrej Ficker, Mykyta Varavin, Petr Vondracek, and Jean-Marie Noterdaeme. 2015. “Post-disruptive Runaway Electron Beam in COMPASS Tokamak.” Ed. Tunde Fulop and Alexander Robinson. Journal of Plasma Physics 81 (5).
Vancouver
1.
Vlainic M, Mlynar J, Cavalier J, Weinzettl V, Paprok R, Imrisek M, et al. Post-disruptive runaway electron beam in COMPASS Tokamak. Fulop T, Robinson A, editors. JOURNAL OF PLASMA PHYSICS. Cambridge Press; 2015;81(5).
IEEE
[1]
M. Vlainic et al., “Post-disruptive runaway electron beam in COMPASS Tokamak,” JOURNAL OF PLASMA PHYSICS, vol. 81, no. 5, 2015.
@article{6862898,
  abstract     = {For ITER-relevant runaway electron studies, such as suppression, mitigation, termination and/or control of runaway beam, obtaining the runaway electrons after the disruption is important. In this paper we report on the first achieved discharges with post-disruptive runaway electron beam, entitled “runaway plateau”, in the COMPASS tokamak. The runaway plateau is produced by massive gas injection of argon. Almost all of the disruptions with runaway electron plateaus occurred during the plasma current ramp-up phase.
Comparison between the Ar injection discharges with and without plateau has been done for various parameters. Parametrisation of the discharges shows that COMPASS disruptions fulfill the range of parameters important for the runaway plateau occurrence. These parameters include electron density, electric field, disruption speed, effective safety factor, maximum current quench electric field. In addition to these typical parameters, the plasma current value just before the massive gas injection surprisingly proved to be important.},
  articleno    = {475810506},
  author       = {Vlainic, Milos and Mlynar, Jan and Cavalier, Jordan and Weinzettl, Vladimir and Paprok, Richard and Imrisek, Martin and Ficker, Ondrej and Varavin, Mykyta and Vondracek, Petr and Noterdaeme, Jean-Marie},
  editor       = {Fulop, Tunde and Robinson, Alexander},
  issn         = {0022-3778},
  journal      = {JOURNAL OF PLASMA PHYSICS},
  keywords     = {Runaway Electrons,FULLY IONIZED GAS,Massive Gas Injection,Disruption in Tokamaks,ION RUNAWAY,UPGRADE,JET},
  language     = {eng},
  number       = {5},
  pages        = {15},
  publisher    = {Cambridge Press},
  title        = {Post-disruptive runaway electron beam in COMPASS Tokamak},
  url          = {http://dx.doi.org/10.1017/S0022377815000914},
  volume       = {81},
  year         = {2015},
}
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