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

Conference · Tue Sep 01 04:00:00 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-
• Conference Information: Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 159:1
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700205* -- Fusion Power Plant Technology-- Fuel
Heating
& Injection Systems
ANTENNAS
CLOSED PLASMA DEVICES
COLD PLASMA
DATA
DIELECTRIC MATERIALS
DIVERTORS
ELECTRIC FIELDS
ELECTRIC IMPEDANCE
ELECTRICAL EQUIPMENT
EQUIPMENT
HEATING
HIGH-FREQUENCY HEATING
ICR HEATING
IMPEDANCE
INFORMATION
MATERIALS
NUMERICAL DATA
PLASMA
PLASMA HEATING
REFLECTION
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
WAVEGUIDES