High power ICRH experiments on the Wisconsin levitated octupole

Conference · Mon Dec 01 04:00:00 EST 1980

OSTI ID:6679443

Strait, E J; Fortgang, C M; Twichell, J C; Dexter, R N; Sprott, J C; Barter, J D

Preliminary ICRH experiments have begun on the Wisconsin Levitated Octupole. In order to study heating, energy confinement, and high ..beta.. plasmas, a 1.8 to 3 MHz oscillator and antenna have been installed. The oscillator and antenna have been installed. The oscillator is capable of delivering 2 MW of RF power for 10 msec, and to date up to 0.5 MW has been coupled into the plasma. At a density of approx. 6 x 10/sup 12/ cm/sup -3/, T/sub e/ reaches a maximum of 30 eV as measured by Langmuir probes and VUV spectroscopy. Charge exchange measurements of T/sub i/ show Maxwellian components at 95 and 190 eV, with an energy confinement time of approx. 1 msec. Electron energy confinement is limited by impurity radiation, and several methods of impurity control are being tested. Current experiments also include direct measurement of the RF electric field, antenna loading measurements, variation of the oscillator frequency, and ohmic heating of the electrons.

• Research Organization: Wisconsin Univ., Madison (USA); TRW Systems, Redondo Beach, CA (USA)
• DOE Contract Number: AS02-76ET53051
• OSTI ID: 6679443
• Report Number(s): DOE/ET/53051-15; CONF-810214-2
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
CLOSED CONFIGURATIONS
ELECTRIC PROBES
ELECTROMAGNETIC RADIATION
HEATING
HIGH-BETA PLASMA
HIGH-FREQUENCY HEATING
ICR HEATING
LANGMUIR PROBE
MAGNETIC FIELD CONFIGURATIONS
MULTIPOLAR CONFIGURATIONS
OCTUPOLAR CONFIGURATIONS
PLASMA
PLASMA DIAGNOSTICS
PLASMA HEATING
PROBES
RADIATIONS
ULTRAVIOLET RADIATION