Observations of ALfvénic-character oscillations in ohmic plasmas on the COMPASS tokamak

0468604 - ÚFP 2017 RIV FR eng C - Conference Paper (international conference)
Markovič, Tomáš - Melnikov, A. - Seidl, Jakub - Eliseev, L. - Havlíček, Josef - Havránek, Aleš - Hron, Martin - Imríšek, Martin - Kovařík, Karel - Medvedev, S. - Bogár, Klára - Mlynář, Jan - Naydenkova, Diana - Pánek, Radomír - Stöckel, Jan - Varju, Jozef - Weinzettl, Vladimír
Observations of ALfvénic-character oscillations in ohmic plasmas on the COMPASS tokamak.
EPS 2016: 43rd European Physical Society Conference on Plasma Physics. Vol. 40A. Mulhouse: European Physical Society, 2016 - (Mantica, P.; Giruzzi, G.; Fajardo, M.; Gans, T.; Poedts, S.; Vennekens, N.), č. článku P5.005. Europhysics Conference Abstracts (ECA), ECA, 40A. ISBN 2-914771-99-1.
[EPS 2016: Conference on Plasma Physics/43./. Leuven (BE), 04.07.2016-08.07.2016]
R&D Projects: GA ČR(CZ) GA16-25074S; GA MŠMT(CZ) 8D15001; GA MŠMT(CZ) LM2015045
Institutional support: RVO:61389021
Keywords : COMPASS tokamak * ALfvénic-character * plasma
Subject RIV: BL - Plasma and Gas Discharge Physics

High-frequency (400-2500 kHz) magnetic oscillations are observed in L-mode confinement regime plasmas and plasmas with high runaway electron population in tokamak COMPASS. The plasma instabilities seems to be of Alfvenic behavior, despite no additional heating being supplied to the plasma. This phenomenon is compared to those of TFTR, MAST, Tuman-3M and AUG tokamaks and similarities are found, which helps to identify possile driving mechanisms of the instabilities.
Permanent Link: http://hdl.handle.net/11104/0266474