RF Behavior of a 200-kW CW Gyrotron

Author

Kartikeyan, M.V. ; Kumar, Arun ; Kamakshi, S. ; Jain, P.K. ; Illy, Stefan ; Borie, Edith ; Piosczyk, Bernhard ; Thumm, Manfred K.

Author_Institution

Dept. of Electron. & Comput. Eng., Indian Inst. of Technol. Roorkee, Roorkee

Volume

36

Issue

3

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

631

Lastpage

636

Abstract

The RF behavior of a 42-GHz 200-kW continuous-wave (CW) gyrotron for plasma heating in a small experimental tokamak is presented in this paper. The operating mode, as a matter of technical convenience, is the mode, as is required by the end user. Design constraints are carefully investigated, and starting currents are computed. Cold-cavity and self-consistent calculations are carried out; power and efficiencies are computed for a typical set of beam parameters. In addition, a triode-type magnetron injection gun (MIG) has been designed, and the realistic beam parameters obtained from these MIG calculations are used in time-dependent self-consistent calculations which are carried out before and after space-charge neutralization. These studies on RF behavior suggest that it is feasible to realize CW powers in excess of 200 kW at 42 GHz with as the operating cavity mode.

Keywords

Tokamak devices; cavity resonators; gyrotrons; magnetrons; plasma radiofrequency heating; plasma toroidal confinement; CW gyrotron RF behavior; CW gyrotron efficiency; CW gyrotron operating mode; CW gyrotron power; MIG calculations; cold cavity calculations; continuous wave gyrotron; frequency 42 GHz; magnetron injection gun; operating cavity mode; plasma heating; power 200 kW; realistic beam parameters; self consistent calculations; space charge neutralization; tokamak; triode type MIG design; Cyclotrons; Electromagnetic heating; Electrons; Gyrotrons; Microwave technology; Millimeter wave technology; Power engineering and energy; Radio frequency; Tokamaks; Electron cyclotron resonance heating (ECRH); gyrotron; tokamak;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2008.923762

Filename

4539870