Runaway electron experiments at COMPASS in support of the EUROfusion ITER physics research

0498244 - ÚFP 2020 RIV GB eng J - Článek v odborném periodiku
Mlynář, Jan - Ficker, Ondřej - Tomešová, Eva - Markovič, Tomáš - Naydenkova, Diana - Papp, G. - Urban, Jakub - Vlainić, M. - Vondráček, Petr - Weinzettl, Vladimír - Bogár, Ondrej - Břeň, D. - Carnevale, D. - Casolari, Andrea - Čeřovský, Jaroslav - Farník, Michal - Gobbin, M. - Gospodarczyk, M. - Hron, Martin - Kulhánek, P. - Havlíček, Josef - Havránek, Aleš - Imríšek, Martin - Jakubowski, M. - Lamas, N. - Linhart, V. - Malinowski, K. - Marcisovsky, M. - Matveeva, Ekaterina - Pánek, Radomír - Plyusnin, V.V. - Rabinski, M. - Svoboda, V. - Svihra, P. - Varju, Jozef - Zebrowski, J.
Runaway electron experiments at COMPASS in support of the EUROfusion ITER physics research.
Plasma Physics and Controlled Fusion. Roč. 61, č. 1 (2019), č. článku 014010. ISSN 0741-3335. E-ISSN 1361-6587
Grant CEP: GA ČR(CZ) GA16-24724S; GA ČR(CZ) GA18-02482S; GA MŠMT(CZ) LM2015045; GA MŠMT(CZ) 8D15001
GRANT EU: European Commission(XE) 633053 - EUROfusion
Institucionální podpora: RVO:61389021
Klíčová slova: disruptions * tokamaks * modes * tokamaks * runaway electrons * MHD instabilities
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 2.829, rok: 2019
Způsob publikování: Omezený přístup
https://iopscience.iop.org/article/10.1088/1361-6587/aae04a

The role of the COMPASS tokamak in research of generation, confinement and losses of runaway electron (RE) population is presented. Recently, two major groups of experiments aimed at improved understanding and control of the REs have been pursued. First, the effects of the massive gas injection (similar to 10(21) Ar/Ne particles) and impurity seeding (similar to 10(18) particles) were studied systematically. The observed phenomena include generation of the post-disruption RE beam and current conversion from plasma to RE. Zero loop voltage control was implemented in order to study the decay in simplified conditions. A distinctive drop of background plasma temperature and electron density was observed following an additional deuterium injection into the RE beam. With the loop voltage control the parametric dependence of the current decay rate dJ/dt can be studied systematically and possibly extrapolated to larger facilities. Second, recent results of experiments focused on the role of the magnetic field in physics of RE were analysed. In this contribution, special attention is given to the observed effects of the resonant magnetic perturbation on the RE population. The benefits of the RE experiments on COMPASS was reinforced by diagnostic enhancements (fast cameras, Cherenkov detector, vertical ECE etc) and modelling efforts (in particular, coupling of the METIS and LUKE codes).
Trvalý link: http://hdl.handle.net/11104/0290635