Simulation investigation of a Ka-band phase-locked klystron-type coaxial relativistic Cherenkov generator

• DOI: 10.1063/5.0218256
• Publication Date: 2025-01-13T16:04:21Z
• Authors: Yunxiao Zhou; Jinchuan Ju; Wei Zhang; Dian Zhang; Ying Li; Tengfang Wang; Fugui Zhou; Zhuang Yu; Hongtao Yao; Jun Zhang
• Keywords: Klystron; Coaxial

To achieve coherent power combination of Ka-band high-power microwave (HPM), a phase-locked klystron-type coaxial relativistic Cherenkov generator (PKC-RCG), which combines the advantageous characteristics weak dimensional sensitivity RCG and low input ratio triaxial klystron amplifier (TKA), is proposed investigated in this paper. The PKC-RCG composed two parts: pre-modulation region adapted from TKA an energy exchange RCG. used for initial speed modulation intense electron beams (IREB), ensuring that output frequency consistent with frequency. deep clustering IREB achieving efficient beam–wave conversion. Phase locking HPM accomplished through phase delivery modulated IREB. Specially designed reflectors cascaded single-gap bunching cavities active suppression asymmetric TM mode are employed to suppress coupling lower ratio. Disk-loaded slow-wave structure smooth inner conductor further decrease By PKC-RCG, 550 MW 29.0 GHz obtained ohmic loss being taken into account. Moreover, phase-locking bandwidth −51.4 dB 30 MHz, respectively.