Title :
Development of 120 GHz gyrotrons
Author :
Okazaki, Y. ; Hayashi, K. ; Komuro, M. ; Mitsunaka, Y. ; Yano, A. ; Ohkubo, Y. ; Ohya, K. ; Okamoto, T. ; Sakamoto, K. ; Nagashima, T.
Author_Institution :
Toshiba Corp., Tochigi, Japan
Abstract :
The authors present the design and initial operation of two 120-GHz gyrotrons under development: a 200-kW TE/sub 03/ mode gyrotron and a 500-kW, TE/sub 12.2/ whispering-gallery-mode gyrotron. The TE/sub 03/ mode gyrotron was tested up to 170 kW with 10-ms pulses. The transmission characteristics of the window proved to affect the mode map significantly for the TE/sub 03/, TE/sub 23/, and TE/sub 52/. For the whispering-gallery-mode gyrotron, a weak TE/sub 12.2/ oscillation was observed at a beam voltage of 50 kV and a beam current of 10 A, although the expected beam condition was not obtained because of a difficulty in the electron gun.<>
Keywords :
gyrotrons; microwave oscillators; 10 A; 120 GHz; 170 kW; 200 kW; 50 kV; 500 kW; TE/sub 03/ mode gyrotron; TE/sub 12.2/ whispering-gallery-mode gyrotron; beam current; beam voltage; mode map; weak TE/sub 12.2/ oscillation; window transmission characteristics; Cathodes; Ceramics; Gyrotrons; Magnetic confinement; Plasma confinement; Power generation; Tensile stress; Testing; Thermal stresses; Whispering gallery modes;
Conference_Titel :
Electron Devices Meeting, 1988. IEDM '88. Technical Digest., International
Conference_Location :
San Francisco, CA, USA
DOI :
10.1109/IEDM.1988.32775
