Fast observations of post-disruption runaway electron beams at the COMPASS tokamak

0508583 - ÚFP 2020 RIV IT eng A - Abstract
Weinzettl, Vladimír - Ficker, Ondřej - Cavalier, Jordan - Vlainic, M. - Imríšek, Martin - Mlynář, Jan - Tomešová, Eva - Čeřovský, Jaroslav - Farník, Michal - Naydenkova, Diana - Háček, Pavel - Hron, Martin - Pánek, Radomír
Fast observations of post-disruption runaway electron beams at the COMPASS tokamak.
Europhysics Conference Abstracts. Milán: European Physical Society, 2019. ISBN 979-10-96389-11-7.
[46th European Physical Society Conference on Plasma Physics. 08.07.2019-12.07.2019, Milán]
R&D Projects: GA ČR(CZ) GA18-02482S
Institutional support: RVO:61389021
Keywords : RE * COMPASS * tomography
OECD category: Fluids and plasma physics (including surface physics)
http://ocs.ciemat.es/EPS2019ABS/pdf/P4.1055.pdf

Energetic electrons, which are foreseen to be produced during disruptions in ITER, represent a potentially dangerous threat for plasma facing components. Therefore, behaviour ofrunaway electron (RE) beams has been studied at the COMPASS tokamak in the frame of dedicated experiments focused on their generation and subsequent mitigation, mainlyusing massive gas injection. In this contribution, we introduce fast observations of the generated RE beams done by different types of high-speed cameras, AXUV detectors as aproxy of fast bolometers, ECE and hard X-ray and photo-neutron detectors. Time dependence and spatial localization of RE have been investigated with respect to severalaspects: formation of the beam, with a special attention to observed filamentary and quiet phases of the beam existence, interaction of the beam with the background plasma as well aswith the tokamak control system, beam extinction by slow decay or by sudden termination.
Permanent Link: http://hdl.handle.net/11104/0299446