Development of 170 GHz and 110 GHz gyrotron for fusion application

Author

Sakamoto, Keishi ; Kasugai, Atsushi ; Ikeda, Yoshitaka ; Hayashi, Kenichi ; Takahashi, Koji ; Tsuneoka, Masaki ; Kariya, Tsuyoshi ; Mitsunaka, Yoshika ; Imai, Tsuyoshi

Author_Institution

RF Heating Lab., JAERI, Ibaraki, Japan

fYear

2002

fDate

2002

Firstpage

336

Lastpage

337

Abstract

A high power and long pulse gyrotron development has been carried out in JAERI for fusion application. The frequency is 170 GHz for ITER (International Thermonuclear Experiment Reactor) and 110 GHz for JT-60U tokamak of JAERI. Both gyrotrons have low loss diamond window. The outputs of 0.9 MW/9.2 sec and 0.5 MW/30 sec were demonstrated at 170 GHz with a depressed collector operation. It was proved that a pulse extension is possible without long time conditioning in principle. On 110 GHz gyrotron, 1.2 MW/4s ec and 1 MW/5 sec operation have been accomplished in the heating experiment of JT-60U.

Keywords

Tokamak devices; fusion reactor design; gyrotrons; millimetre wave tubes; plasma radiofrequency heating; 110 GHz; 170 GHz; ITER; JT-60U tokamak; current drive system; depressed collector operation; electron cyclotron heating; high power; long pulse gyrotron; low loss diamond window; magnetron injection gun; oscillation mode; pulse extension; Diffraction; Gyrotrons; Heating; Optical waveguides; Plasma temperature; Power generation; Radio frequency; Temperature measurement; Tokamaks; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2002. IVEC 2002. Third IEEE International

Print_ISBN

0-7803-7256-5

Type

conf

DOI

10.1109/IVELEC.2002.999408

Filename

999408