Optimization of high power and high efficiency operation of 77GHz gyrotrons for ECRH in the large helical device

Optimization of high power and high efficiency operation of 77GHz gyrotrons for ECRH in the large helical device

Three Mega-Watt 77GHz gyrotrons were developed for an ECRH system in LHD. Their operation could be highly optimized by means of two-step rise of an anode voltage. Output power of 1.78MW with 37.9% efficiency were obtained in the 3rd gyrotron. The system improvement has been promoted including the de...

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Bibliographic Details
Main Authors:	Shimozuma, T, Takahashi, H, Ito, S, Kobayashi, S, Kubo, S, Yoshimura, Y, Igami, H, Nishiura, M, Ogasawara, S, Makino, R, Mizuno, Y, Okada, K, Takita, Y, Ito, Y, Mutoh, T, Minami, R, Kariya, T, Imai, T
Format:	Conference item
Published:	2011

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