Abstract
An X-band Cerenkov-type high power microwave (HPM) oscillator driven by a sheet electron beam is proposed and designed in this paper. In order to improve the efficiency of simulation optimization, a research method is proposed in which the large caliber coaxial Cerenkov-type HPM oscillator is taken as an initial model, which is equivalent to that of the planar slow-wave structure (SWS) by using the similarity between the planar SWS and the large caliber coaxial SWS. In addition, the effectiveness of the equivalent method is verified from the geometric structure, the field distribution of the operating mode, dispersion characteristics, and the preliminary particle simulation results of two devices. Based on the results of an X-band large caliber coaxial Cerenkov-type HPM oscillator, an X-band Cerenkov-type HPM oscillator driven by a sheet electron beam is investigated by the 3D particle-in-cell code. The simulation results show that the power conversion efficiency can reach 26.1% at the frequency of 11.9 GHz with the output power of 0.3 GW, while the sheet electron beam has the energy of 486 kV and it carries the current of 2.4 kA conducted by the magnetic field of 2.5 T.
Highlights
The Cerenkov-type oscillator is one of the important types of the long pulse and repetition frequency high power microwave (HPM) source due to its high power, high efficiency, and high repetitive rate.1–5 In addition, there is still a close relationship between the operating frequency and the device size
In order to improve the efficiency of simulation optimization, a research method is proposed in which the large caliber coaxial Cerenkov-type HPM oscillator is taken as an initial model, which is equivalent to that of the planar slow-wave structure (SWS) by using the similarity between the planar SWS and the large caliber coaxial SWS
The simulation results show that the power conversion efficiency can reach 26.1% at the frequency of 11.9 GHz with the output power of 0.3 GW, while the sheet electron beam has the energy of 486 kV and it carries the current of 2.4 kA conducted by the magnetic field of 2.5 T
Summary
The Cerenkov-type oscillator is one of the important types of the long pulse and repetition frequency high power microwave (HPM) source due to its high power, high efficiency, and high repetitive rate. In addition, there is still a close relationship between the operating frequency and the device size. Based on the above discussion, an X-band Cerenkov-type HPM oscillator driven by a sheet electron beam is proposed and designed in this paper. In order to improve the work efficiency, the large caliber coaxial Cerenkov-type HPM oscillator is investigated by the 2.5D particle-in-cell (PIC) code first. According to the results, the device driven by a sheet electron beam is investigated by the 3D PIC code.
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