Performance Test of Double-Disk Type Output Window of 28/35 GHz Dual-Frequency Gyrotron for CW Operation

Maki OKADA; Tsuyoshi KARIYA; Tsuyoshi IMAI; Ryutaro MINAMI; Tomoharu NUMAKURA; Yuto EBASHI; Fumiya MOTOYOSHI; Yousuke NAKASHIMA

doi:10.1585/pfr.14.2405043

Regular Articles

Performance Test of Double-Disk Type Output Window of 28/35 GHz Dual-Frequency Gyrotron for CW Operation

Maki OKADA, Tsuyoshi KARIYA, Tsuyoshi IMAI, Ryutaro MINAMI, Tomoharu NUMAKURA, Yuto EBASHI, Fumiya MOTOYOSHI, Yousuke NAKASHIMA

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Keywords: gyrotron, ECH system, millimeter wave, 28 GHz, 35 GHz, CW operation, double-disk window

JOURNAL FREE ACCESS

2019 Volume 14 Pages 2405043

DOI https://doi.org/10.1585/pfr.14.2405043

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Abstract

A 28 GHz/35 GHz dual-frequency gyrotron has been developed for use by the University of Tsukuba and its collaborative research institutions. This gyrotron incorporates a sapphire double disk window for 28-GHz 0.4 MW-Continuous Wave (CW) operation. The heat transfer coefficient was estimated by comparing the measurement results of the output window temperature with calculated values and the results suggest that this gyrotron can operate in the CW operation.

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