Initial high-power testing of the ATF (Advanced Toroidal Facility) ECH (electron cyclotron heating) system

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5925592

White, T L; Bigelow, T S; Kimrey, Jr, H D

The Advanced Toroidal Facility (ATF) is a moderate aspect ratio torsatron that will utilize 53.2 GHz 200 kW Electron Cyclotron Heating (ECH) to produce nearly current-free target plasmas suitable for subsequent heating by strong neutral beam injection. The initial configuration of the ECH system from the gyrotron to ATF consists of an optical arc detector, three bellows, a waveguide mode analyzer, two TiO/sub 2/ mode absorbers, two 90/sup 0/ miter bends, two waveguide pumpouts, an insulating break, a gate valve, and miscellaneous straight waveguide sections feeding a launcher radiating in the TE/sub 02/ mode. Later, a focusing Vlasov launcher will be added to beam the ECH power to the saddle point in ATF magnetic geometry for optimum power deposition. The ECH system has several unique features; namely, the entire ECH system is evacuated, the ECH system is broadband, forward power is monitored by a newly developed waveguide mode analyzer, phase correcting miter bends will be employed, and the ECH system will be capable of operating short pulse to cw. Initial high-power tests show that the overall system efficiency is 87%. The waveguide mode analyzer shows that the gyrotron mode output consists of 13% TE/sub 01/, 82.6% TE/sub 02/, 2.5% TE/sub 03/, and 1.9% TE/sub 04/. 4 refs.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 5925592
• Report Number(s): CONF-8709157-1; ON: DE88000885
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700205* -- Fusion Power Plant Technology-- Fuel
Heating
& Injection Systems
ASPECT RATIO
ATF TORSATRON
BEAM INJECTION HEATING
CLOSED PLASMA DEVICES
ECR HEATING
EFFICIENCY
HEATING
HIGH-FREQUENCY HEATING
PERFORMANCE TESTING
PLASMA HEATING
STELLARATORS
TESTING
THERMONUCLEAR DEVICES
TORSATRON STELLARATOR
WAVEGUIDES