Electron cyclotron resonance heating transmission line and launching system for the Wendelstein VII-AS stellarator
- 1. Max-Planck-Institut fuer Plasmaphysik, Garching (Germany, F.R.)
- 2. Stuttgart Univ. (Germany, F.R.). Inst. fuer Plasmaforschung
Description
A 70-GHz electron cyclotron resonance heating (ECRH) system (4 x 0.2 MW for 3 s and 0.2 MW for 0.1 s) has been installed on the Wendelstein VII-AS stellarator for plasma buildup, heating, and current drive. Five commercially available gyrotrons, each delivering 0.2-MW radio-frequency (rf) output power, serve as the ECRH sources. The microwaves are transmitted to the stellarator by conventional oversized waveguides, and they convert the gyrotron output mode to a linearly polarized Gaussian free-space mode, which is launched to the plasma at arbitrary poloidal and toroidal angles by a quasi-optical launcher. The transmission line and launching system as well as the related rf diagnostics are discussed in detail. Experimental results on heating and current drive obtained with various kinds of microwave launching are presented
Additional details
Publishing Information
- Journal Title
- Fusion Technology
- Journal Volume
- 17
- Journal Issue
- 1
- Series
- Fusion Technol.
- Journal Page Range
- 76-85
- ISSN
- 0748-1896
- CODEN
- FUSTE
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21077186
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY; S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Descriptors DEI
- BUILDUP; CURRENT-DRIVE HEATING; ECR HEATING; EXPERIMENT PLANNING; LAUNCHING; MICROWAVE AMPLIFIERS; PLASMA; PLASMA DIAGNOSTICS; RF SYSTEMS; WAVEGUIDES; WENDELSTEIN-7 STELLARATOR
- Descriptors DEC
- AMPLIFIERS; CLOSED PLASMA DEVICES; ELECTRONIC EQUIPMENT; EQUIPMENT; HEATING; HIGH-FREQUENCY HEATING; MICROWAVE EQUIPMENT; PLANNING; PLASMA HEATING; STELLARATORS; THERMONUCLEAR DEVICES