Prebunched high-harmonic gyrotron

Author

Kou, C.S. ; McDermott, David B. ; Luhmann, N.C. ; Chu, Kwo R.

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

Volume

18

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

343

Lastpage

349

Abstract

A scheme for harmonic wave generation using a prebunched electron beam has been demonstrated. The prebunched electron beam has been used to further increase the efficiency of the authors´ axis-encircling high-harmonic gyrotron. The proof-of-principle experiment was performed at the third harmonic with a TE₃₁₂ mode at 27.7 GHz. The conversion power of 6.7 kW was significantly greater than that used in the nonprebunched experiment. Also, mode competition was effectively suppressed. As expected, the unsaturated output power is proportional to the square of the electron beam current and the start of oscillation current is essentially zero. A linear theory, derived by taking into account the spread of the guiding center and the spread of the axial velocity, gives good agreement with the experimental results

Keywords

gyrotrons; harmonic generation; microwave generation; 27.7 GHz; 6.7 kW; TE₃₁₂ mode; axial velocity; conversion power; harmonic wave generation; high-harmonic gyrotron; linear theory; prebunched electron beam; Electron beams; Equations; Gyrotrons; Helium; Magnetic fields; Magnetic resonance; Power generation; Radio frequency; Tellurium; Weapons;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.55904

Filename

55904