Full conversion from ohmic to runaway electron driven current via massive gas injection in the TCV tokamak
Decker, J. W. Q. S. A. Z. X.; Papp, G.; Coda, S.; Duval, B. P.; Sheikh, U.; Blanchard, P.; Choi, D.; Galperti, C.; Calacci, L.; Carnevale, D.; Ficker, O.; Gobbin, M.; Labit, B.; Macusova, E.; Mlynar, J.; Plyusnin, V.; Sauter, O.
2022

Abstract

Full conversion from ohmic to runaway electron (RE) driven current was observed in the tokamak a configuration variable (TCV) following massive injection of neon through a disruption mitigation valve into a low-density limited circular plasma. Following a partial disruption, a stable 200 kA RE beam is maintained for more than 1 s. Controlled ramp-down of the RE beam with adjustable decay rate was demonstrated. Control of the beam vertical position was achieved down to a RE current of 20 kA. RE beam formation is observed in elongated plasma configurations up to kappa = 1.5. A reproducible scenario for RE beam generation without loss of circulating current is of particular interest for disruption modelling applications.

Details

Title Full conversion from ohmic to runaway electron driven current via massive gas injection in the TCV tokamak
Author(s) Decker, J. W. Q. S. A. Z. X. ; Papp, G. ; Coda, S. ; Duval, B. P. ; Sheikh, U. ; Blanchard, P. ; Choi, D. ; Galperti, C. ; Calacci, L. ; Carnevale, D. ; Ficker, O. ; Gobbin, M. ; Labit, B. ; Macusova, E. ; Mlynar, J. ; Plyusnin, V. ; Sauter, O.
Published in Nuclear Fusion
Volume 62
Issue 7
Pages 076038
Date 2022-07-01
Publisher Bristol, IOP Publishing Ltd
ISSN 0029-5515
1741-4326
Keywords
DOI https://doi.org/10.1088/1741-4326/ac544e
Other identifier(s) View record in Web of Science
Laboratories SPC
Record Appears in Scientific production and competences > SB - School of Basic Sciences > SPC - Swiss Plasma Center > SPC - Swiss Plasma Center
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2022-06-06

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