Changes to the ion temperature profile during IBW heating in PBX-M
- Oak Ridge National Laboratory, Tennessee (United States)
- Princeton University Plasma Physics Laboratory New Jersey (United States)
- Jaeri (Japan)
- ENEA, Frascati (Italy)
The introduction of Ion Bernstein Wave Heating (IBWH) experiments in PBX-M have demonstrated significant bulk ion heating and ion temperature (T[sub i]) profile modification. T[sub i] profiles were obtained using a multi-channel, charge-exchange recombination spectroscopy system (the CHERS diagnostic). With IBWH, there are density increases; so to produce comparative discharges when no IBWH is present, additional gas must be injected. For [bar n][sub e], of [similar to]3[times]10[sup 13] cm[sup [minus]3], the central ion temperature, T[sub i0], was observed to increase by 350 eV when 0.6 MW of IBWH was applied for [similar to]300 msec. The product [bar n][sub e] T[sub i0], a measure of the ion stored energy, increases linearly with IBWH power. The T[sub i] profile broadened with IBWH and the ion temperature gradient steepened near the predicted power deposition layer, providing evidence of localized heating. Examination of [Delta]T[sub i] profile evolution indicated that the IBWH power was, in fact, deposited in a localized, off-axis region.
- DOE Contract Number:
- AC02-76CH03073
- OSTI ID:
- 7263117
- Report Number(s):
- CONF-9304112-; CODEN: APCPCS
- Journal Information:
- AIP Conference Proceedings (American Institute of Physics); (United States), Vol. 289:1; Conference: 10. topical conference on radio frequency power in plasmas, Boston, MA (United States), 1-3 Apr 1993; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PLASMA HEATING
BERNSTEIN MODE
ELECTRON TEMPERATURE
ION CYCLOTRON-RESONANCE
ION PLASMA WAVES
ION TEMPERATURE
PBX DEVICES
CLOSED PLASMA DEVICES
CYCLOTRON RESONANCE
HEATING
ION WAVES
OSCILLATION MODES
PLASMA WAVES
RESONANCE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700350* - Plasma Production
Heating
Current Drive
& Interactions- (1992-)
700340 - Plasma Waves
Oscillations
& Instabilities- (1992-)