PBX-M ion Bernstein wave heating overview

Conference · Fri Jan 01 04:00:00 EST 1993

OSTI ID:6563113

Ono, M; Chu, T K; Hermann, H; LeBlanc, B; Tighe, W; Bell, R; Bernabei, S; Hatcher, R; Kaita, R; Kaye, S; Kugel, H; Okabayashi, M; Oliver, H; Paul, S; Sauthoff, N; Sesnic, S; Takahashi, H ^[1]; Cesario, R ^[2]; Seki, T ^[3]; Asakura, N ^[4]

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1. Princeton Univ., NJ (United States). Plasma Physics Lab.
2. ENEA, Frascati (Italy)
3. National Inst. for Fusion Science, Nagoya (Japan)
4. Japan Atomic Energy Research Inst., To

A high power ion Bernstein wave heating system has been introduced on PBX-M for heating and for controlling the plasma pressure profile in an effort to achieve the stable high beta second stability'' regime. The pressure profile can be controlled through local bulk ion heating as well as density profile control. In bean-shaped plasmas with plasma currents range from 180 kA to 250 kA, good ion heating up to the highest, applied rf power, ([approx]700 kW) has been observed. The observed broadening of the ion temperature profile is consistent with localized off-axis bulk ion heating as predicted by IBW ray tracing calculations. Application of IBW also resulted in a greatly modified density profile. The ability for IBW to change the density profile appears to be particularly attractive for controlling the bootstrap current profile for advanced tokamaks. Many important IBWH-related edge physics results were also obtained, including ponderomotive edge plasma modification and parametric instability onset conditions. The experimental plan for the next IBW run includes investigation of synergy with LHCD, attainment of high bootstrap current fraction discharges utilizing the IBW density profile control, and exploration of high beta plasma regimes.

• Research Organization: Princeton Univ., NJ (United States). Plasma Physics Lab.
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6563113
• Report Number(s): PPPL-CFP-2811; CONF-9304112--3; ON: DE93011963
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350* -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
BERNSTEIN MODE
CLOSED PLASMA DEVICES
COMPACT IGNITION TOKAMAK
CONFINEMENT
HEATING
INSTABILITY
ION PLASMA WAVES
ION WAVES
OSCILLATION MODES
PARAMETRIC INSTABILITIES
PLASMA CONFINEMENT
PLASMA HEATING
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PLASMA WAVES
THERMONUCLEAR DEVICES
THERMONUCLEAR REACTORS
TOKAMAK DEVICES
TOKAMAK TYPE REACTORS