A GW-level Ku-band oversized coaxial relativistic Cerenkov generator with low guiding magnetic field

Xiaoling Wu; Changhua Chen; Yan Teng; Ping Wu; Renzhen Xiao; Yanchao Shi; Dewen Yang; Jun Sun

doi:10.1063/1.5093788

AIP Advances (Jun 2019)

A GW-level Ku-band oversized coaxial relativistic Cerenkov generator with low guiding magnetic field

Xiaoling Wu,
Changhua Chen,
Yan Teng,
Ping Wu,
Renzhen Xiao,
Yanchao Shi,
Dewen Yang,
Jun Sun

Affiliations

Xiaoling Wu: Department of Engineering Physics, Tsinghua University, Beijing 100084, China
Changhua Chen: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, Shaanxi 710024, China
Yan Teng: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, Shaanxi 710024, China
Ping Wu: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, Shaanxi 710024, China
Renzhen Xiao: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, Shaanxi 710024, China
Yanchao Shi: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, Shaanxi 710024, China
Dewen Yang: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, Shaanxi 710024, China
Jun Sun: Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi’an, Shaanxi 710024, China

DOI: https://doi.org/10.1063/1.5093788
Journal volume & issue: Vol. 9, no. 6
pp. 065006 – 065006-7

Abstract

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A novel coaxial relativistic Cerenkov generator (CRCG) operating in quasi-transverse electromagnetic mode is proposed for generating Ku-band high-power microwave radiation. It is found that using a cathode with a shielding electrode can decrease the diffusing electric field in the diode, thereby allowing a CRCG with the proposed diode structure to operate in a low guiding magnetic field. Taking advantage of the two-sectional slow wave structure, the output power and conversion efficiency are improved. Furthermore, a simple optimization rule is proposed for the length of the drift cavity and is verified by numerical simulation. In a particle-in-cell simulation, when the diode voltage and beam current are 550 kV and 4.2 kA, respectively, the microwave with an output power of 1 GW at 15.3 GHz is achieved in a guiding magnetic field of 0.35 T, yielding a conversion efficiency of 43%.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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