Prospects for EBW Heating and Current Drive on Spherical Tori

0360969 - ÚFP 2012 RIV SG eng C - Conference Paper (international conference)
Urban, Jakub - Preinhaelter, Josef - Decker, J. - Peysson, Y. - Taylor, G. - Vahala, L. - Vahala, G.
Prospects for EBW Heating and Current Drive on Spherical Tori.
Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC-16):Proceedings of the 16th Joint Workshop. Toh Tuck Link: World Scientific, 2011, s. 257-262. ISBN 978-981-4340-26-7.
[Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating/16th./. Sanya (CN), 12.04.2010-15.04.2010]
R&D Projects: GA MŠMT 7G10072; GA MŠMT LA08048; GA ČR GA202/08/0419
Institutional research plan: CEZ:AV0Z20430508
Keywords : Tokamak * Spherical tokamak * Current drive * Heating * EBW * ECRH
Subject RIV: BL - Plasma and Gas Discharge Physics

The electrostatic electron Bernstein wave (EBW) can provide localised on- and off-axis heating and current drive in typically overdense (high-β) spherical tori (ST) where the usual electromagnetic EC modes are cut-off. Hence, the EBW is a candidate for plasma control and stabilisation in such devices. We present here a modelling of EBW heating and current drive in realistic ST conditions, particularly in typical NSTX equilibria and in model equilibria for NHTX and MAST Upgrade. The EBW injection parameters are varied in order to find optimized scenarios and possible ways to control the deposition location and the driven current. It is shown that EBWs can be deposited and efficiently drive current at any radial location.
Permanent Link: http://hdl.handle.net/11104/0198400