Recent results for the 1.5-MW, 110-GHz gyrotron experiment

Author

Anderson, J.P. ; Shapiro, M.A. ; Temkin, R.J. ; Mastovsky, I.

Author_Institution

Plasma Sci. & Fusion Center, Massachusetts Inst. of Technol., Cambridge, MA, USA

fYear

2004

fDate

27-29 April 2004

Firstpage

34

Lastpage

35

Abstract

High power gyrotrons used for ECH heating of the DIII-D Tokamak at General Atomics have been able to produce 1 MW at 110 GHz for close to 10 s. The next generation of these tubes is being designed and built to produce 1.5 MW. The gyrotron design includes a 96 W, 40 A MIG electron gun to achieve a microwave efficiency of 39% in the TE_22,6 mode. The physics and engineering features of the 1.5 MW, 110 GHz gyrotron are being examined at MIT, where a short (3 μs) pulse experimental version of the gyrotron is used for testing the gun and cavity design. In this study we present the most recent results of these experiments.

Keywords

Tokamak devices; electron guns; gyrotrons; millimetre wave generation; millimetre wave tubes; plasma radiofrequency heating; 1 MW; 1.5 MW; 10 s; 110 GHz; 3 mus; 39 percent; 40 A; 96 W; ECH heating; MIG electron gun; TE_22,6 mode; Tokamak; high power gyrotrons; microwave efficiency; Cathodes; Current measurement; Electromagnetic heating; Gyrotrons; Magnetic field measurement; Power generation; Power measurement; Probes; Temperature distribution; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2004. IVEC 2004. Fifth IEEE International

Print_ISBN

0-7803-8261-7

Type

conf

DOI

10.1109/IVELEC.2004.1316184

Filename

1316184