High power operation of Gaussian beam gyrotron with CVD diamond window for JT-60U
Creators
- 1. RF Heating Laboratory, Naka Fusion Research Establishment, Japan Atomic Energy Research Institute (JAERI), Naka-machi, Ibaraki-ken, Japan 311-0193 (Japan)
- 2. Electron Tubes and Devices Division, Toshiba Corporation, Ohtawara-shi, Tochigi, 324-8550 (Japan)
Description
A 110 GHz-Gaussian beam output gyrotron with CVD (Chemical Vapor Deposition) diamond window was developed for the electron cyclotron heating and current drive on JT-60U. A stable Gaussian output beam power of 1.1 MW-0.1 s was obtained with the efficiency of 39% with depressed collector operation. Due to Gaussian beam output from the gyrotron, the coupling efficiency to HE11 mode in the mirror optical unit was 94%. Moreover, the transmission efficiency of 89% for HE11 mode was performed at the power level of 1 MW on the 40 m-transmission test line of φ31.751 mm corrugated waveguide and 8-miter bends included 1-pair of polarizer. The gyrotron and transmission line were installed into JT-60U system and 0.6 MW-0.3 s power was successfully injected into JT-60U plasmas as an initial operation
Additional details
Identifiers
- DOI
- 10.1063/1.59706;
Publishing Information
- Journal Title
- AIP Conference Proceedings
- Journal Volume
- 485
- Journal Issue
- 1
- Journal Page Range
- p. 449-452
- ISSN
- 0094-243X
- CODEN
- APCPCS
Conference
- Title
- 13. topical conference on radio frequency power in plasmas
- Dates
- 12-14 Apr 1999
- Place
- Annapolis, MD (United States)
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 40080779
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CHEMICAL VAPOR DEPOSITION; COUPLING; DIAMONDS; ECR CURRENT DRIVE; ECR HEATING; EFFICIENCY; GHZ RANGE; JT-60U TOKAMAK; MICROWAVE AMPLIFIERS; MIRRORS; OPERATION; PLASMA; POWER TRANSMISSION LINES; RF SYSTEMS; WAVEGUIDES
- Descriptors DEC
- AMPLIFIERS; CARBON; CHEMICAL COATING; CLOSED PLASMA DEVICES; DEPOSITION; ELECTRONIC EQUIPMENT; ELEMENTS; EQUIPMENT; FREQUENCY RANGE; HEATING; HIGH-FREQUENCY HEATING; MICROWAVE EQUIPMENT; MINERALS; NON-INDUCTIVE CURRENT DRIVE; NONMETALS; PLASMA HEATING; SURFACE COATING; THERMONUCLEAR DEVICES; TOKAMAK DEVICES
Optional Information
- Notes
- (c) 1999 American Institute of Physics.