Application of a grating polarizer to the 106.4 GHz ECH system on Heliotron-E

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1145518· OSTI ID:165315

Nagasaki, K ^[1]; Isayama, A ^[2]; Ejiri, A ^[3]

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1. Plasma Physics Laboratory, Kyoto University, Uji, Kyoto 611 (Japan)
2. Faculty of Engineering, Kyoto University, Kyoto 606 (Japan)
3. National Institute for Fusion Science, Nagoya 464-01 (Japan)

A grating polarizer with rectangular grooves is designed for the 106.4 GHz electron cyclotron heating (ECH) system on the Heliotron-E helical device. The polarizer is installed on mirrors of waveguide miter bends. In oversized waveguides, the HE{sub 11} mode can be treated by the plane wave theory. The polarization of the reflected wave is calculated as a function of the groove parameters and the mirror rotation angle. When launching the ECH power to fusion devices with moderate or strong magnetic shear such as heliotron/torsatron configurations, we should take into account the change of the wave polarization through the plasma. The effect of the magnetic shear can be investigated by using the polarizer. The dependence of the absorbed power on the mirror rotation angle is presented. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• OSTI ID: 165315
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 6 Vol. 66; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ECR HEATING
GHZ RANGE 100-1000
HELIOTRON
MICROWAVE EQUIPMENT
MIRRORS
PLASMA
POLARIZATION
WAVE PROPAGATION
WAVEGUIDES