Fabrication and high-power testing of an X-band high-power phase shifter for the very compact inverse Compton scattering gamma-ray source

This paper proposed an X-band phase shifter for the very compact inverse Compton scattering gamma-ray source program at Tsinghua University and conducted its structure design, numerical simulation, fabrication, cold test, and high-power testing. This phase shifter is composed of a polarizer, circula...

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Veröffentlicht in:Review of scientific instruments 2024-09, Vol.95 (9)
Hauptverfasser: Hu, Fangjun, Zha, Hao, Shi, Jiaru, Gao, Qiang, Liu, Focheng, Gao, Jian, Feng, Boyuan, Li, Hongyu, Li, Qingzhu, Gu, Weihang, Chen, Huaibi
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Sprache:eng
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Zusammenfassung:This paper proposed an X-band phase shifter for the very compact inverse Compton scattering gamma-ray source program at Tsinghua University and conducted its structure design, numerical simulation, fabrication, cold test, and high-power testing. This phase shifter is composed of a polarizer, circular waveguide, and a piston with a choke structure. The simulation results show that the reflection coefficient of the phase shifter is under −40 dB and the insertion coefficient exceeds −0.06 dB at the operating frequency of 11.424 GHz. The phase variation is 20°/mm, and a linear phase change from 0° to 360° can be achieved with a piston displacement of 18 mm. The manufactured phase shifter has exhibited good performance in the cold test by using the vector network analyzer. After 16 h conditioning in the Tsinghua X-band high-power test stand, the phase shifter reached a peak power of 72 MW at 230 ns pulse width and a peak power of 82 MW at 130 ns pulse width. After processing signals from the high-speed oscilloscope, it was found that the transmission phase variations were in good agreement with the simulation results.
ISSN:0034-6748
1089-7623
1089-7623
DOI:10.1063/5.0221123