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Title: A Ka-band TM{sub 02} mode relativistic backward wave oscillator with cascaded resonators

Abstract

By combining the Cerenkov-type generator with the cascaded resonators, this paper proposes a Ka-band relativistic backward wave oscillator operating under the guide magnetic field 1.0 T with high power handling capability and high conversion efficiency. It is found that TM{sub 02} can be selected as the operation mode in order to increase the power handling capability and provide sufficient coupling with the electron beam. In slow wave structure (SWS), ripples composed of semicircle on top of the rectangle enhance the wave-beam interaction and decrease the intensity of the electric field on the metallic surface. Taking advantage of the resonator cascades, the output power and the conversion efficiency are promoted greatly. The front cascaded resonators efficiently prevent the power generated in SWS from leaking into the diode region, and quicken the startup of the oscillation due to the premodulation of the beam. However, the post cascade slightly postpones the startup because of the further energy extraction from the electron beam. The numerical simulation shows that generation with power 514 MW and efficiency 41% is obtained under the diode voltage 520 kV and current 2.4 kA. And the microwave with the pure frequency spectrum of 29.35 GHz radiates in the pure TM{sub 01} mode.

Authors:
; ; ; ; ; ;  [1]
  1. Northwest Institute of Nuclear Technology, Xi'an 710024 (China)
Publication Date:
OSTI Identifier:
22407931
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 21; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; ELECTRIC FIELDS; ELECTRIC POTENTIAL; ELECTRON BEAMS; ENERGY CONVERSION; GHZ RANGE; INTERACTIONS; MAGNETIC FIELDS; METALS; MICROWAVE RADIATION; OSCILLATIONS; OSCILLATORS; RELATIVISTIC RANGE; RESONATORS; SPECTRA

Citation Formats

Teng, Yan, Cao, Yinbin, Song, Zhimin, Ye, Hu, Shi, Yanchao, Chen, Changhua, and Sun, Jun. A Ka-band TM{sub 02} mode relativistic backward wave oscillator with cascaded resonators. United States: N. p., 2014. Web. doi:10.1063/1.4902531.
Teng, Yan, Cao, Yinbin, Song, Zhimin, Ye, Hu, Shi, Yanchao, Chen, Changhua, & Sun, Jun. A Ka-band TM{sub 02} mode relativistic backward wave oscillator with cascaded resonators. United States. https://doi.org/10.1063/1.4902531
Teng, Yan, Cao, Yinbin, Song, Zhimin, Ye, Hu, Shi, Yanchao, Chen, Changhua, and Sun, Jun. 2014. "A Ka-band TM{sub 02} mode relativistic backward wave oscillator with cascaded resonators". United States. https://doi.org/10.1063/1.4902531.
@article{osti_22407931,
title = {A Ka-band TM{sub 02} mode relativistic backward wave oscillator with cascaded resonators},
author = {Teng, Yan and Cao, Yinbin and Song, Zhimin and Ye, Hu and Shi, Yanchao and Chen, Changhua and Sun, Jun},
abstractNote = {By combining the Cerenkov-type generator with the cascaded resonators, this paper proposes a Ka-band relativistic backward wave oscillator operating under the guide magnetic field 1.0 T with high power handling capability and high conversion efficiency. It is found that TM{sub 02} can be selected as the operation mode in order to increase the power handling capability and provide sufficient coupling with the electron beam. In slow wave structure (SWS), ripples composed of semicircle on top of the rectangle enhance the wave-beam interaction and decrease the intensity of the electric field on the metallic surface. Taking advantage of the resonator cascades, the output power and the conversion efficiency are promoted greatly. The front cascaded resonators efficiently prevent the power generated in SWS from leaking into the diode region, and quicken the startup of the oscillation due to the premodulation of the beam. However, the post cascade slightly postpones the startup because of the further energy extraction from the electron beam. The numerical simulation shows that generation with power 514 MW and efficiency 41% is obtained under the diode voltage 520 kV and current 2.4 kA. And the microwave with the pure frequency spectrum of 29.35 GHz radiates in the pure TM{sub 01} mode.},
doi = {10.1063/1.4902531},
url = {https://www.osti.gov/biblio/22407931}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 12,
volume = 21,
place = {United States},
year = {Mon Dec 15 00:00:00 EST 2014},
month = {Mon Dec 15 00:00:00 EST 2014}
}