Effects of high power ion Bernstein waves on a tokamak plasma

Technical Report · Wed Apr 01 04:00:00 EST 1987

DOI:https://doi.org/10.2172/6158959· OSTI ID:6158959

Ono, M; Beiersdorfer, P; Bell, R; Bernabei, S; Cavallo, A; Chmyga, A; Cohen, S; Colestock, P; Gammel, G; Greene, G J

Ion Bernstein wave heating (IBWH) has been investigated on PLT with up to 650 kW of rf power coupled to the plasma, exceeding the ohmic power of 550 kW. Plasma antenna loading of 2 ..cap omega.. has been observed, resulting in 80 to 90% of the rf power being coupled to the plasma. An ion heating efficiency of ..delta..T/sub i/(0)n/sub e//P/sub rf/ = 6 x 10/sup 13/ eV cm/sup -3//kW, without high energy tail ions, has been observed up to the maximum rf power. The deuterium particle confinement during high power IBWH increases significantly (as much as 300%). Associated with it, a longer injected impurity confinement time, reduced drift wave turbulence activity, frequency shifts of drfit wave turbulence, and development of a large negative edge potential were observed. The energy confinement time, however, shows some degradation from the ohmic value, which can be attributed to the enhanced radiation loss observed during IBWH. The ion heating and energy confinement time are relatively independent of plasma current.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6158959
• Report Number(s): PPPL-2430; ON: DE87013211
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
DATA
DEUTERIUM
EFFICIENCY
EXPERIMENTAL DATA
HEATING
HIGH-FREQUENCY HEATING
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
PLASMA HEATING
PLT DEVICES
STABLE ISOTOPES
TEMPERATURE GRADIENTS
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS