Ion Bernstein wave heating experiments on PBX-M

Conference · Sat Jul 01 04:00:00 EDT 1989 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:6476509

Ono, M; Greene, G J; Bernabei, S ^[1]

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1. PPPL, Princeton University, Princeton, NJ (USA)

A multi-megawatt level IBWH experiment on PBX-M{sup 1} is in preparation. The goal of the expriment is to contribute to the attainment of the high beta, second regime of stability. The high power IBWH will be used as an additional heating power source to supplement the existing 6 MW of NBI power to achieve higher {beta} values in PBX-M. Bulk ion heating via IBW excitation with localized, off-axis deposition can be used to modify the pressure profile for improved plasma stability at high {beta}. The high power off-axis heating in principle can generate a significant boostrap current {sup 2}({approx}30%) in the outer region of the PBX-M plasma complementing LHCD for broadening the current profiles. It is also interesting to note that the available rf power ({approx}4 MW) is comparable to the predicted power levels required for the rf ponderomotive stabilization of pressure driven modes (such as the high-n ballooning{sup 3} and external kink modes{sup 4}) for the closely fitted stabilizing shell configuration of PBX-M. There are, however, several experimental factors that require careful consideration in planning a high power experiment. Four important factors are discussed here in some detail: 1. Antenna location. 2. Effects of parallel electric fields. 3. Modification of launched wave spectrum due to antenna misalignement 4. Possible interference of wave launching by protective limiters.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6476509
• Report Number(s): CONF-8905120--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 190:1
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ANTENNAS
BERNSTEIN MODE
CLOSED PLASMA DEVICES
CURRENT DENSITY
ELECTRIC FIELDS
ELECTRICAL EQUIPMENT
EQUIPMENT
HEATING
HIGH-BETA PLASMA
HIGH-FREQUENCY HEATING
ICR HEATING
LIMITERS
OSCILLATION MODES
PBX DEVICES
PLASMA
PLASMA DENSITY
PLASMA HEATING
THERMONUCLEAR DEVICES
TOKAMAK DEVICES