Simulations of EBW current drive and power deposition in the WEGA Stellarator

Journal Article · Thu Nov 26 00:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3273788· OSTI ID:21335765

Preinhaelter, J; Urban, J ^[1]; Laqua, H P; Podoba, Y ^[2]; Vahala, L ^[3]; Vahala, G ^[4]

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1. EURATOM/IPP.CR Association, Institute of Plasma Physics, 182 00 Prague (Czech Republic)
2. Max-Plank Institut fuer Plasmaphysik, EURATOM Ass., D-17491, Greifswald (Germany)
3. Old Dominion University, Norfolk, VA 23529 (United States)
4. College of William and Mary, Williamsburg, VA 23185 (United States)

The WEGA stellarator is well suited for fundamental electron Bernstein wave (EBW) studies. Heating and current drive experiments at 2.45 GHz and 28 GHz, carried out in WEGA's low temperature, steady state overdense plasmas, were supported by intensive modelling. We employ our AMR (Antenna-Mode-conversion-Ray-tracing) code to calculate the O-X-EBW conversion efficiency with a full-wave equation solver, while the power deposition and current drive profiles using ray tracing. Several phenomena have been studied and understood. Particularly, EBW current drive was theoretically predicted and experimentally detected at 2.45 GHz. Simulations confirmed the presence of two (cold and hot) electron components and the resonant behaviour of the EBW power deposition and its dependence on the magnetic field configuration. Furthermore, the code is used to predict the 28 GHz heating and current drive performance and to simulate EBW emission spectra.

• OSTI ID: 21335765
• Journal Information: AIP Conference Proceedings, Vol. 1187, Issue 1; Conference: 18. topical conference on radio frequency power in plasmas, Gent (Belgium), 24-26 Jun 2009; Other Information: DOI: 10.1063/1.3273788; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
A CODES
ANTENNAS
BERNSTEIN MODE
COMPUTERIZED SIMULATION
CURRENT-DRIVE HEATING
ELECTRONS
EMISSION SPECTRA
ENERGY ABSORPTION
GHZ RANGE
MAGNETIC FIELD CONFIGURATIONS
MODE CONVERSION
PERFORMANCE
PLASMA
PLASMA SIMULATION
PLASMA WAVES
STEADY-STATE CONDITIONS
WAVE EQUATIONS
WEGA STELLARATOR