High-power harmonic gyro-TWT´s. I. Linear theory and oscillation study

Author

Kou, C.S. ; Wang, Q.S. ; McDermott, D.B. ; Lin, A.T. ; Chin, K.R. ; Luhmann, N.C., Jr.

Author_Institution

California Univ., Los Angeles, CA, USA

Volume

20

Issue

3

fYear

1992

fDate

6/1/1992 12:00:00 AM

Firstpage

155

Lastpage

162

Abstract

A linear theory using Laplace transforms which is applicable to both gyrotron traveling wave amplifiers (gyro-TWTs) and gyrotron backward-wave oscillators (gyro-BWOs) is presented. The validity of the linear theory is verified by comparing it with an existing nonlinear self-consistent theory based on a different approach. In conjunction with a time-dependent multimode particle simulation code, the linear theory is applied to study the stability of harmonic gyro-TWTs. It is shown that a harmonic gyro-TWT can be made stable to all forms of spontaneous oscillations by employing a multistage interaction structure and that it can generate power levels far in excess of those possible for a fundamental gyro-TWT. The linear bandwidth of a second-harmonic gyro-TWT amplifier is also calculated

Keywords

Laplace transforms; electromagnetic oscillations; gyrotrons; harmonic generation; microwave amplifiers; travelling-wave-tubes; Laplace transforms; gyrotron backward-wave oscillators; gyrotron traveling wave amplifiers; harmonic gyro-TWT; high power TWT; linear bandwidth; linear theory; multistage interaction structure; spontaneous oscillations; stability; time-dependent multimode particle simulation code; Bandwidth; Electrons; Frequency; Gyrotrons; High power amplifiers; Oscillators; Physics; Power generation; Power system harmonics; Stability;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.142815

Filename

142815