Development of a kW Level-200 GHz Gyrotron FU CW GI with an Internal Quasi-optical Mode Convertor

作者：Tatematsu Yoshinori^*; Yamaguchi Yuusuke; Idehara Toshitaka; Ozeki Takanori; Ikeda Ryosuke; Kanemaki Tomohiro; Ogawa Isamu; Saito Teruo

来源：Journal of Infrared Millimeter and Terahertz Waves, 2012, 33(3): 292-305.

DOI：10.1007/s10762-012-9881-2

• Gyrotron
• Gaussian beam
• Mode convertor
• High power radiation source

Development of gyrotrons with an internal mode convertor has started in Research Center for Development of Far-Infrared Region, University of Fukui (FIR FU). As the first gyrotron of such a kind, we have designed and manufactured Gyrotron FU CW GI. It operates at 203 GHz at fundamental cyclotron resonance. We have designed a cavity and a mode convertor under some constraints such as reuse of an electron gun and small diameter of a magnet bore. Designed output power is about 1 kW. We have succeeded in observation of a circular radiation pattern. The maximum observed output power is 0.5 kW for the setting cathode voltage of 20 kV and the beam current of 0.5 A. This success makes gyrotron development in FIR FU to proceed to a new stage.

• 出版日期2012-3