Quasi-optical 140 GHz ECRH system on the advanced W VII-AS stellarator

Conference · Sat Jul 01 00:00:00 EDT 1989 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:6476787

Henle, W; Kasparek, W; Kumric, H; Mueller, G A; Schueller, P G; Thumm, M ^[1]; Erckmann, V ^[2]

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1. Institut fuer Plasmaforschung, Univ. Stuttgart, D-7000 Stuttgart (Federal Republic of Germany)
2. Max-Planck-Institut fuer Plasmaphysik, EURATOM Ass., Garching (Federal Republic of Germany)

A design is presented of a 140 GHz 2nd harmonic electron cyclotron resonance heating (ECRH) system to be used on the advanced stellarator W VII-AS at IPP Garching. The primary objectives of these ECRH experiments will be (1) to extend the density range for ECRH and for combined heating (NBI and/or ICRH), (2) to investigate the local electron heat transport in high density plasmas by the heat-wave technique, (3) to develop new millimeter-wave transmission line concepts and antenna systems for reactor-compatible multi-megawatt heating of future large-size stellarators. The planned 140 GHz ECRH facility will use a 200 kW/100 to 200 ms TEO3-mode gyrotron from KfK Karlsruhe combined with a quasi-optical fundamental Gaussian-mode transmission system employing focusing metallic mirrors as phase correcting elements. The unpolarized gyrotron output mode will be converted directly into the linearly polarized Gaussian free-space beam with the help of a quasi-optical coupler. A universal quasi-optical polarizer will provide the optimum polarization state in order to get the best accessibility conditions to the plasma.

• OSTI ID: 6476787
• Report Number(s): CONF-8905120-; CODEN: APCPC; TRN: 90-032457
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (USA), Vol. 190:1; Conference: 8. topical conference on radio frequency power in plasmas, Irvine, CA (USA), 1-3 May 1989; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
WENDELSTEIN-7 STELLARATOR
ECR HEATING
ANTENNAS
DESIGN
ELECTRON TEMPERATURE
HARMONICS
PLASMA DENSITY
POLARIZATION
CLOSED PLASMA DEVICES
ELECTRICAL EQUIPMENT
EQUIPMENT
HEATING
HIGH-FREQUENCY HEATING
OSCILLATIONS
PLASMA HEATING
STELLARATORS
THERMONUCLEAR DEVICES
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production