研究目的
Investigating a new relativistic microwave Cherenkov generator of millimeter wavelength range with high efficiency of beam-to-microwave power conversion.
研究成果
The study successfully demonstrated stable microwave generation at 36.4 GHz with a peak power of 800 MW and a conversion efficiency of 45%. The combined interaction of the electron beam with TM01 and TM02 waves in the slow-wave structure was key to achieving high efficiency. The results align well with numerical simulations, indicating the potential for further optimization and application in high-power microwave devices.
研究不足
The experiment encountered challenges in maintaining stable microwave generation due to the complexity of suppressing competing oscillations in the oversized slow-wave structure. The precision manufacturing of small parts for millimeter wavelength oscillators was also a significant challenge.
1：Experimental Design and Method Selection:
The study utilized a high-current SINUS-200 electron accelerator for generating a relativistic electron beam. The design incorporated mechanisms for suppressing parasitic waves to ensure stable microwave generation at
2：4 GHz. Sample Selection and Data Sources:
The experiment involved a vacuum diode and an electrodynamic system with a slow-wave structure (SWS) made of titanium alloy.
3：List of Experimental Equipment and Materials:
Key equipment included the SINUS-200 electron accelerator, a vacuum diode, a two-section pulse solenoid for electron beam transport, and a horn antenna for microwave radiation emission.
4：Experimental Procedures and Operational Workflow:
The experiment varied the voltage in the vacuum diode and the electron beam current to optimize microwave generation. Microwave diagnostics were performed using receiving antennas and a hot carrier detector.
5：Data Analysis Methods:
Microwave power and frequency were measured using calibrated antennas and a heterodyne receiver. The radiation pattern was integrated to calculate the total microwave power.
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