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Efficient generation of multi-gigawatt power by a klystron-like relativistic backward wave oscillator

Published online by Cambridge University Press:  07 September 2010

R.Z. Xiao*
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
X.W. Zhang
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
L.J. Zhang
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
X.Z. Li
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
L.G. Zhang
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
W. Song
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
Y.M. Hu
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
J. Sun
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
S.F. Huo
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
C.H. Chen
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
Q.Y. Zhang
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
G.Z. Liu
Affiliation:
Northwest Institute of Nuclear Technology, Xi'an, Shaanxi, People's Republic of China
*
Address correspondence and reprint requests to: Renzhen Xiao, Northwest Institute of Nuclear Technology, P.O. Box 69-13, No. 28, Pingyu Lu, Baqiao Qu, Xi'an, Shaanxi, People's Republic of China710024. E-mail: xiaorenzhen@gmail.com

Abstract

Efficient generation regime with a high power output has been experimentally realized in a klystron-like relativistic backward wave oscillator, in which a modulation cavity is inserted between the slow wave structure to decrease the energy spread of modulated beam electrons, and an extraction cavity is employed at the end of the slow wave structure to further recover energy from the electron beam. At a guiding magnetic field of 2.2 T, a microwave pulse with power of 6.5 GW, frequency of 4.26 GHz, pulse duration of 38 ns, and efficiency of 36% was generated when the diode voltage was 1.1 MV, and diode current was 16.4 kA. When the diode voltage was 820 kV, efficiency up to 47% with microwave power 4.4 GW was also realized experimentally.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2010

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