Design of a high-efficiency S-band relativistic klystron oscillator under a low guiding magnetic field
Year: 2025
Type: article
Abstract: A high-efficiency S-band relativistic klystron oscillator (RKO) under a low guiding magnetic field is proposed and investigated in detail in this paper. Two-stage segmented modulation is introduced to compensate for the poor coherence of the electron beam, allowing the electron beam to be deeply modulated even under a low guiding magnetic field. In the particle-in-cell simulation, the proposed RKO generates a microwave with an output power of 3.66 GW at 3.10 GHz under a guiding magnetic field of 0.7 T, corresponding to the power conversion efficiency of 41.3%. To substantiate the practical performance, an experimental validation of the proposed RKO is conducted. The RKO successfully generates a microwave with an output power of 3.02 GW at 3.08 GHz, achieving a power conversion efficiency of 32.2%, under a guiding magnetic field of 0.71 T. These findings confirm that the S-band high-power microwave source can work with high power conversion efficiency under a low guiding magnetic field.
Source: Physics of Plasmas
DOI: 10.1063/5.0240796
Authors: Jiawen Li, Rujin Deng, Xingjun Ge, Fangchao Dang, Peng Zhang, Fuxiang Yang, Kejia Zhang, Hang Chi
Institution: National University of Defense Technology
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Award: G7931829013
OpenAlex ID: W4407102237