Electron Bernstein Wave Research on the National Spherical Torus Experiment

Journal Article · Mon Sep 26 00:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2098252· OSTI ID:20726339

Taylor, G; Diem, S; Efthimion, P C; Fredd, E; Hosea, J; Wilson, J R ^[1]; Bers, A; Decker, J; Ram, A K ^[2]; Bigelow, T S; Carter, M D; Caughman, J B; Jaeger, F; Rasmussen, D A; Wilgen, J B ^[3]; Ershov, N M; Smirnov, A P ^[4]; Harvey, R W ^[5]; Preinhaelter, J ^[6]

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1. Princeton Plasma Physics Laboratory, Princeton University, Princeton, NJ 08543 (United States)
2. Plasma Science and Fusion Center, MIT, Cambridge, MA 02139 (United States)
3. Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States)
4. Moscow State University, Moscow (Russian Federation)
5. CompX, Del Mar, CA 92014 (United States)
6. Institute of Plasma Physics, Prague (Czech Republic)

Off-axis electron Bernstein wave current drive (EBWCD) may be critical for sustaining non-inductive high {beta} NSTX plasmas. Modeling results predict that the {approx} 100 kA of off-axis current needed to stabilize a solenoid-free high {beta} NSTX plasma could be generated by by 3 MW of 28 GHz EBW power. Synergy with the bootstrap current may enhance CD efficiency by {approx} 10%. EBW radiometry measurements on NSTX support coupling to EBWs by launching elliptically polarized electromagnetic waves oblique to the confining magnetic field. Plans are being developed to implement a 1 MW, 28 GHz proof-of-principle EBWCD system to test the EBW coupling, heating and CD physics at high rf power densities on NSTX.

• OSTI ID: 20726339
• Journal Information: AIP Conference Proceedings, Vol. 787, Issue 1; Conference: 16. topical conference on radio frequency power in plasmas, Park City, UT (United States), 11-13 Apr 2005; Other Information: DOI: 10.1063/1.2098252; (c) 2005 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
BERNSTEIN MODE
BOOTSTRAP CURRENT
COMPUTERIZED SIMULATION
COUPLING
EFFICIENCY
ELECTROMAGNETIC RADIATION
ELECTRONS
GHZ RANGE
HIGH-BETA PLASMA
HIGH-FREQUENCY HEATING
MAGNETIC FIELDS
NSTX DEVICE
PLASMA SIMULATION
PLASMA WAVES
POWER DENSITY
RF SYSTEMS
SOLENOIDS
SPHERICAL CONFIGURATION