Analysis of Oversized Sliding Waveguide by Mode Matching and Multi-Mode Network Theory |
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Authors: | K Ohkubo S Kubo H Idei T Shimozuma Y Yoshimura F Leuterer M Sato and Y Takita |
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Institution: | (1) National Institute for Fusion Science, Toki, 509-5292, Japan;(2) Present address: Max-Planck Institut für Plasmaphysik, Boltzmanstrasse 2, D-95748 Garching, Germany |
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Abstract: | Transmission and reflection coefficients of hybrid modes in the sliding waveguide are discussed on the basis of mode matching method and multi-mode network theory. It is confirmed that the decrease in power of < 0.2% at 84 GHz is obtained for 2 cm in gap of the sliding waveguide which is composed of the corrugated waveguide with 88.9 mm diam. and the smooth-wall waveguide with 110 mm diam. At the sliding length near multi-half-wavelength in vacuum, transmission and reflection powers in the sliding waveguide change slightly, because the very small amount of standing wave in high higher-mode is produced resonantly in the gap. |
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Keywords: | mode-matching method multi-mode network theory sliding waveguide corrugated waveguide coupling transmission line electron cyclotron heating |
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