Design and experiment of X-band long-pulse high power microwave source

被引：1

作者：

Zhang J. ^{[1
]}

Jin Z. ^{[1
]}

Yang J. ^{[1
]}

Zhong H. ^{[1
]}

Shu T. ^{[1
]}

Zhang J. ^{[1
]}

Yuan C. ^{[1
]}

Li Z. ^{[1
]}

Fan Y. ^{[1
]}

Zhou S. ^{[1
]}

机构：

[1] College of Opto-Electronic Science and Engineering, National University of Defense Technology

来源：

Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2010年 / 22卷 / 11期

关键词：

High-power microwave source; Long pulse; Overmoded slow-wave structure; Repetition operation; X-band;

D O I：

10.3788/HPLPB20102211.2643

中图分类号：

学科分类号：

摘要：

he difficulties in producing long pulse high-power microwave(HPM) with relativistic backward wave oscillators(RBWOs) are analyzed theoretically. The field distributions of a single-mode slow-wave structure(SWS) and an overmoded SWS with the overmode ration of about 3 are calculated and compared, which indicates that the latter can effectively reduce the RF-field on SWS surface under the same energy storage, but the reduction is not as notable as the increase of the overmode ration due to the change of field distribution. An X-band long pulse HPM source using an SWS with the overmode ration of 3 is designed and investigated experimentally. The devices generates 2 GW microwave power with pulse duration of 80 ns at single shot mode, and 1.2 GW microwave power with pulse duration of 100 ns at 20 Hz repetition mode. The microwave frequency is 9.38 GHz with dominant mode of TM01, and the power conversion efficiency is about 24%. It is suggested that RF breakdown at surfaces of the microwave window and SWSs is the key factor to prevent the source outputting longer pulses with higher power in current experiments.

引用

页码：2643 / 2647

页数：4

共 16 条

[1] Friedman M., Krall J., Lau Y.Y., Et al., Efficient generation of multi-gigawatt RF power by a klystron-like amplifier, Rev Sci Instrum, 61, 1, pp. 171-176, (1990)
[2] Haworth M., Baca G., Benford J., Et al., Significant pulse-lengthening in a multigigawatt magnetically insulated transmission line oscillator, IEEE Trans on Plasma Sci, 26, 2, pp. 312-318, (1998)
[3] Hahn K., Schamiloglu E., Long-pulse relativistic backward wave oscillator operation utilizing a disk cathode, IEEE Trans on Plasma Sci, 30, 3, pp. 235-239, (2002)
[4] Korovin S.D., Mesyats G.A., Pegel I.V., Et al., Pulsed width limitation in the relativistic backward wave oscillator, IEEE Trans on Plasma Sci, 28, 3, pp. 485-491, (2000)
[5] Agee F.J., Evolution of pulse shortening research in narrow band, high power microwave sources, IEEE Trans on Plasma Sci, 26, 3, pp. 235-240, (1998)
[6] Hegeler F., Schamiloglu E., Korovin S.D., Et al., Recent advance in the study of a long pulse relativistic backward wave oscillator, Proc 12th IEEE Int Pulsed Power Conf, pp. 825-828, (1999)
[7] Gunin A.V., Landl V.F., Korovin S.D., Et al., Experimental studies of long-lifetime cold cathodes for high-power microwave oscillators, IEEE Trans on Plasma Sci, 28, 3, pp. 537-541, (2000)
[8] Polevin S.D., Korovin S.D., Kovalchuk B.M., Et al., Pulse lengthening of S-band resonant relativistic BWO, 13th International Symposium on High Current Electronics, pp. 246-249, (2004)
[9] Zhang J., Zhong H., Shu T., Et al., Experimental investigation of X-band long pulse high-power microwave generation, High Power Laser and Particle Beams, 20, 3, pp. 443-446, (2008)
[10] Gunin A.V., Klimov A.I., Korovin S.D., Et al., Relativistic X-band BWO with 3-GW output power, IEEE Trans on Plasma Sci, 26, 3, pp. 326-331, (1998)

← 1 2 →