Self-consistent transport simulations of COMPASS operation with optimized NBI

0346433 - ÚFP 2011 RIV GB eng J - Journal Article
Urban, Jakub - Stránský, Michal - Fuchs, Vladimír - Voitsekhovitch, I. - Valovič, M.
Self-consistent transport simulations of COMPASS operation with optimized NBI.
Plasma Physics and Controlled Fusion. Roč. 52, č. 4 (2010), 045008-045008. ISSN 0741-3335. E-ISSN 1361-6587
R&D Projects: GA MŠMT(CZ) LC528; GA MŠMT 7G09042
Institutional research plan: CEZ:AV0Z20430508
Keywords : COMPASS tokamak * transport * neutral beam injection (NBI)
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 2.466, year: 2010
http://iopscience.iop.org/0741-3335/52/4/045008

The COMPASS tokamak, a mid-sized flexible device with ITER-like shape, which can operate in H-mode, is starting its re-established operation at the Institute of Plasma Physics in Prague. A new 600kW, 40 keV neutral beam injection (NBI) system is foreseen as a major upgrade. Reported here are predictive simulations with the ASTRA transport code, in which the FAFNER Monte-Carlo NBI code is, for the first time, self-consistently integrated. These simulations are carried out for several typical COMPASS scenarios with different magnetic fields, plasma currents and shapes. We compare ohmic scenarios with NBI-heated scenarios and show that NBI is able to significantly improve the plasma performance, particularly to attain Ti~=Te, which is the primary goal of the NBI system. The NBI performance is discussed in detail. The chosen energy of 40 keV is shown to be in many aspects optimum.
Permanent Link: http://hdl.handle.net/11104/0187464