Electron Collector Materials for High-power Microwave Source: High-current Relativistic Electron Beam Bombardment-induced Physical Effects and Relevant Performance Requirements
CHEN Bin, WAN Hong, HUA Ye
College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073
Abstract: Collector of high-power microwave source is a key component which influences the stability and lifetime of the high-power microwave system. The physical effects rose from collector bombarded by high-current electron beam, such as secondary electrons, back scattered electrons, and Bremsstrahlung radiation, which consequently lead to quality decline of the generated microwave. The substantial temperature rise induced by continuous concentration of electron beam energy upon electron collector will result in invalidation or even structural failure of the collector. Moreover, high-current relativistic electron beam bombardment also causes material's partial evaporation and subsequently, pollution of the vacuum chamber. In this paper, the physical effects rose from the material bombarded by high-current electron beam are discussed, with which requirements for both properties and materials of collector for high-power microwave source are proposed.
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2017, Vol. 31 
