X波段低磁场相对论返波管振荡器实验研究

基于现有永磁磁体的参数,并结合高功率微波器件的优点,设计了一个X 波段低磁场相对论返波管振荡器,当引导磁场强度为0. 48T、二极管束压和束流分别为530 kV 和7. 0 kA 时,通过粒子模拟软件得到频率9. 42 GHz、功率1. 11GW 的模拟微波输出,器件束波转换效率30%。在强流电子束加速器平台上进行实验研究,当二极管电压500kV、电流6. 2kA、引导磁场强度0. 46T 时,得到频率为9. 40GHz、功率为900MW、脉宽为32ns 的微波输出。该实验结果为低磁场器件实现高功率、高效率微波输出及永磁包装打下了良好的基础。

Experimental Study on X-Band Relativistic Backward Wave Oscillator with Low Magnetic Field

Based on the magnetic parameters of the existing permanent magnet and the advantages of high power microwave devices, a X band relativistic backward wave oscillator (RBWO) with low magnetic field is designed. It is shown from the PIC(particle in cell) simulation that when the strength of guiding magnetic field is 0. 48T while the electron voltage and the beam current 530kV and 7. 6kA respectively, the 1. 11GW output microwave power with 9. 42GHz frequency and 30% efficiency is obtained. The experiment was performed, in which the output power 900MW with the frequency 9. 40GHz and the corresponding pulse width 32ns was obtained for guiding magnetic field 0. 46T, beam voltages 500kV and beam current 6. 2kA. The experimental results lay a good foundation for the low magnetic field devices to achieve higher power and higher efficiency microwave output and its permanent magnet packaging.