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

Conference · Sat Jul 01 04:00:00 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--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 190:1
• Country of Publication: United States
• Language: English

Related Subjects

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