Estimation of the runaway electron current during the flattop phase in COMPASS.

0482695 - ÚFP 2018 RIV FR eng C - Conference Paper (international conference)
Tomešová, Eva - Urban, Jakub - Ficker, Ondřej - Mlynář, Jan - Vlainić, M. - Papřok, Richard - Varju, Jozef - Weinzettl, Vladimír - Čeřovský, J. - Farník, M. - Pokol, G. - Plyusnin, V. - Havlíček, Josef - Pánek, Radomír - Hron, Martin
Estimation of the runaway electron current during the flattop phase in COMPASS.
EPS 2017: 44th European Physical Society Conference on Plasma Physics. Vol. 41F. Mulhouse: European Physical Society, 2017 - (Fajardo, M.; Westerhof, E.; Riconda, C.; Melzer, A.; Bret, A.; Dromey, B.), č. článku P4.141. Europhysics Conference Abstracts (ECA). ISBN 979-10-96389-07.
[EPS 2017 Conference on Plasma Physics/44./. Belfast (IE), 26.06.2017-30.06.2017]
R&D Projects: GA MŠMT LG14002; GA MŠMT(CZ) LM2015045; GA MŠMT(CZ) 8D15001
EU Projects: European Commission(XE) 633053 - EUROfusion
Institutional support: RVO:61389021
Keywords : METIS * RE current * non-disruptive phase
OECD category: Fluids and plasma physics (including surface physics)

Prevention and mitigation of the runaway electron (RE) beam is a topic in urgent need of investigation, because RE beam poses a serious threat for safe operation of tokamaks [1], as it can cause severe damage of the plasma facing components. Combination of numerical simulations and measurements provided on compact sized tokamaks as COMPASS (ITER-like shape, R0 = 0.56 m, a = 0.23 m, BT = 1.15 T and Ip 400 kA) [2] can help to better understand the RE beam formation, evolution and termination. Non-disruptive COMPASS discharges with a special request on Ip waveform with drops were selected for testing possibility of estimation of a fraction of plasma current carried by RE in the plasma current flattop phase. A method estimating runaway current in non-disruptive part of plasma discharge will be a useful tool for a deeper insight into the not fully understood of RE physics.
Permanent Link: http://hdl.handle.net/11104/0278216