Theory of step-tunable gyrotrons operating at two cyclotron harmonics

Author

Nusinovich, Gregory S. ; Read, Michael E.

Author_Institution

Lab. for Plasma Res., Maryland Univ., College Park, MD, USA

Volume

27

Issue

2

fYear

1999

fDate

4/1/1999 12:00:00 AM

Firstpage

355

Lastpage

362

Abstract

The scaling of operating parameters and the tendencies in the efficiency of the step-tunable gyrotron operating in a set of modes in a cavity of a given length are considered. Results of calculations are reported for the design of a ~1-kW, step-tunable gyrotron oscillator operating from 150 to 600 GHz in steps of about 15 GHz. Detailed results are presented for the efficiency, power losses in the cavity, and the starting conditions. Designs of the electron gun electrodes and of an output mode transducer are also presented. Full modulation of the radiation via the modulating anode of a magnetron injection gun is considered. The gyrotron would be of use for plasma diagnostics and spectroscopy, including electron paramagnetic resonance spectroscopy (EPR)

Keywords

EPR spectroscopy; electron guns; gyrotrons; harmonics; losses; millimetre wave oscillators; millimetre wave tubes; plasma diagnostics; starting; submillimetre wave oscillators; submillimetre wave tubes; tuning; 1 kW; 150 to 600 GHz; EPR; cavity; cyclotron harmonics; efficiency; electron gun electrodes; electron paramagnetic resonance spectroscopy; gyrotron oscillator; magnetron injection gun; modulating anode; operating parameters; output mode transducer; plasma diagnostics; power losses; starting conditions; step-tunable gyrotrons; voltage modulation; Anodes; Cyclotrons; Electrodes; Electrons; Gyrotrons; Magnetic modulators; Oscillators; Paramagnetic resonance; Spectroscopy; Transducers;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.772261

Filename

772261