article Open Access
Broadband Continuously Frequency Tunable Gyrotron for 600 MHz DNP-NMR Spectroscopy
Plasma and Fusion Research · 2014 · Vol. 9(0) · pp. 1206058–1206058
Ryosuke Ikeda✉(Japan Atomic Energy Agency)Yuusuke Yamaguchi(University of Fukui)Y. Tatematsu(University of Fukui)T. Idehara(University of Fukui)I. Ogawa(University of Fukui)T. Saito(University of Fukui)Yoh Matsuki(Osaka University)Toshimichi Fujiwara(Osaka University)
Abstract
A broadband continuously frequency tunable gyrotron with a triode-type magnetron injection gun was developed as power source for analysis of protein structures. The TE7,3 oscillation mode was selected to avoid mode competitions in the high magnetic field side. Axial modes of the TE7,3,−10 were sequentially excited by changing the cavity magnetic field, and frequency tuning of about 4 GHz around 395 GHz was observed with output power greater than 50 W. The frequency also varied about 1GHz as the anode-cathode voltage varied. Thus, the broadest tuning bandwidth in the 400 GHz band gyrotrons was achieved.
Gyrotron and Vacuum Electronics ResearchMicrowave Engineering and WaveguidesParticle accelerators and beam dynamicsGyrotronBroadbandTriodeCathodeAnodeBandwidth (computing)Materials scienceMagnetic fieldOpticsOptoelectronics
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