Investigation of HHFW and NBI Combined Heating in NSTX

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

DOI:https://doi.org/10.1063/1.2098201· OSTI ID:20726373

LeBlanc, B P; Bell, R E; Bernabei, S; Hosea, J C; Wilson, J R ^[1]; Biewer, T M ^[2]

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1. Princeton Plasma Physics Laboratory, NJ (United States)
2. Plasma Science and Fusion Center, MIT, MA (United States)

A series of experiments was conducted to investigate the combined utilization of HHFW and NBI auxiliary heating in NSTX plasmas. A modest increase of the total stored energy coincident with a near doubling of the neutron production rate is observed when NBI heating is added to HHFW in L-mode plasmas. An increase in the core electron temperature is also observed. On the other hand, essentially no stored energy augmentation nor neutron production rate enhancement is observed when applying HHFW during the 'H' phase of NBI driven H-mode plasmas. Spectroscopic measurements of the edge carbon line radiation indicate an unpredicted ion temperature increase, suggesting that edge effects are reducing the amount of HHFW power reaching the plasma core.

• OSTI ID: 20726373
• 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: 10.1063/1.2098201; (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
AUXILIARY HEATING
BEAM INJECTION HEATING
CARBON
ELECTRON TEMPERATURE
H-MODE PLASMA CONFINEMENT
ION TEMPERATURE
L-MODE PLASMA CONFINEMENT
NEUTRAL ATOM BEAM INJECTION
NEUTRONS
NSTX DEVICE
PLASMA
PLASMA BEAM INJECTION
RF SYSTEMS
STORED ENERGY