Analysis and experiments for a waveguide launcher in the ICRF for tokamaks with divertors

Conference · Tue Sep 01 00:00:00 EDT 1987 · AIP Conf. Proc.; (United States)

OSTI ID:7020227

Lam, N T; Lee, J L; Eldridge, O C; Scharer, J E

We present an analysis of a rectangular dielectric-filled waveguide, suitable for ICRF heating. To simulate the H-mode, we take the edge plasma to consist of a pedestal of variable length followed by a region with either a parabolic or a gaussian variation. We present numerical results for the waveguide reflection coefficient, the equivalent surface plasma impedance and the electric field profile at the aperture, for a wide range of edge plasma conditions. A dielectric-filled rectangular waveguide launcher has been designed, fabricated and tested for the ICRF wave coupling. Our theoretical analyses and measurements over the 60--130 MHz range indicate that a very high power coupling efficiency (greater than or equal to90%) can be obtained for a matched launcher with appropriate tuning of the noncontacting sliding short. An input reflection coefficient model has been developed for a matched or plasma-loaded waveguide launcher and compared with measurements.

• Research Organization: University of Wisconsin, Madison
• OSTI ID: 7020227
• Report Number(s): CONF-870570-; TRN: 88-027547
• Journal Information: AIP Conf. Proc.; (United States), Vol. 159:1; Conference: 7. topical conference on applications of radio-frequency power to plasmas, Kissimmee, FL, USA, 4 May 1987
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COLD PLASMA
ELECTRIC FIELDS
ELECTRIC IMPEDANCE
ICR HEATING
TOKAMAK DEVICES
DIVERTORS
PLASMA HEATING
WAVEGUIDES
REFLECTION
ANTENNAS
DIELECTRIC MATERIALS
NUMERICAL DATA
CLOSED PLASMA DEVICES
DATA
ELECTRICAL EQUIPMENT
EQUIPMENT
HEATING
HIGH-FREQUENCY HEATING
IMPEDANCE
INFORMATION
MATERIALS
PLASMA
THERMONUCLEAR DEVICES
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