Development of X-band relativistic backward-wave oscillator with permanent magnet

Ma Qiaosheng; Zhang Yunjian; Li Zhenghong; Wu Yang

doi:10.11884/HPLPB201729.160456

Volume 29 Issue 02

Feb. 2017

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Article Navigation > High Power Laser and Particle Beams > 2017 > 29(02): 023002

Liu Peng, Shi Dunfu, Li Kang, et al. Researchand validation on coupling method of JMCT and subchannel code[J]. High Power Laser and Particle Beams, 2018, 30: 016010. doi: 10.11884/HPLPB201830.170252

Citation:

Ma Qiaosheng, Zhang Yunjian, Li Zhenghong, et al. Development of X-band relativistic backward-wave oscillator with permanent magnet[J]. High Power Laser and Particle Beams, 2017, 29: 023002. doi: 10.11884/HPLPB201729.160456

Liu Peng, Shi Dunfu, Li Kang, et al. Researchand validation on coupling method of JMCT and subchannel code[J]. High Power Laser and Particle Beams, 2018, 30: 016010. doi: 10.11884/HPLPB201830.170252

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Development of X-band relativistic backward-wave oscillator with permanent magnet

doi: 10.11884/HPLPB201729.160456

1.
Science and Technology on High Power Microwave Laboratory,Institute of Applied Electronics,CAEP,P.O.Box 919-1015,Mianyang 621900,China

Received Date: 2016-09-12
Rev Recd Date: 2016-11-07
Publish Date: 2017-02-15

Abstract

Abstract

Firstly, an X-band backward-wave oscillator(BWO) with a low guiding magnetic field is designed, whose output microwave power of 1.24 GW at frequency of 9.1 GHz is achieved under the condition of 750 kV voltage and 5.5 kA current when the strength of the guiding magnetic field is 0.46 T. In order to lower the strength of the guiding magnetic field so as to actualize the permanent-magnet-packaging of the relativistic BWO (RBWO), special slow wave structure is designed to increase the quality factor Q of the device, simultaneously increase the coupling impedance between the electron beam and the slow wave structure. Then a 0.46 T permanent magnet is developed, which is 48 cm long and 116 kg in weight. At last, experiment is carried out to investigate the RBWO with the permanent magnet, a 900 MW output power at 9.08 GHz frequency is obtained when the device is operating in 20 Hz repetitive rate for 1 s, while a 940 MW output power is obtained in single pulse condition.
- backward-wave oscillator,
- permanent magnet,
- slow-wave structure,
- resonance reflector,
- quasi reflector

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