- 标题
- 摘要
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- 实验方案
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Improvement of the Beam-Wave Interaction Efficiency Based on the Coupling-Slot Configuration in an Extended Interaction Oscillator
摘要： A method aimed at improving the beam-wave interaction efficiency by changing the coupling slot configuration has been proposed in the study of extended interaction oscillators (EIOs). The dispersion characteristics, coupling coefficient and interaction impedance of the high-frequency structure based on different types of coupling slots have been investigated. Four types of coupled cavity structures with different layouts of the coupling slots have been compared to improve the beam-wave interaction efficiency, so as to analyze the beam-wave interaction and practical applications. In order to determine the improvement of the coupling slot to a coupled cavity circuit in an EIO, we designed four nine-gap EIOs based on the coupled cavity structure with different coupling slot configurations. With different operating frequencies and voltages takes into consideration, beam voltages from 27 to 33 kV have been simulated to achieve the best beam-wave interaction efficiency so that the EIOs are able to work in the 2π mode. The influence of the Rb and the ds on the output power is also taken into consideration. The Rb is the radius of the electron beam, and the ds is the width of the coupling slot. The simulation results indicate that a single-slot-type EIO has the best beam-wave interaction efficiency. Its maximum output power is 2.8 kW and the efficiency is 18% when the operating voltage is 31 kV and electric current is 0.5 A. The output powers of these four EIOs that were designed for comparison are not less than 1.7 kW. The improved coupling-slot configurations enables the extended interaction oscillator to meet the different engineering requirements better.
关键词： Output power,Coupling slot configuration,Extended interaction oscillator,Beam-wave interaction efficiency
更新于2025-09-23 15:22:29
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A high-order mode extended interaction oscillator operating in the Y band
摘要： In this paper, we propose an extended interaction oscillator (EIO) operating with a high-order mode in the Y band. Compared to the conventional EIO operating with the fundamental mode, it operates with the TM31 mode. Since it operates with a high-order mode, the inner surface of the EIO is much larger, which increases the power capacity of the device. The dif?culty in manufacturing such an enlarged cavity is thereby mitigated. By optimizing the multi-gap structure, designing the magnet subsystem, and preparing the e-gun subsystem, the con?guration of EIO is con?rmed. Finally, through particle-in-cell simulations, the performance of this device is studied. Under the conditions of 15 kV and 150 mA for the beam, the output power was around 85 W with a frequency of 338.4 GHz. The output signal was stable, showing the high reliability of this device.
关键词： extended interaction oscillator,power capacity,high-order mode,TM31 mode,Y band
更新于2025-09-09 09:28:46