独立调谐热阴极微波电子枪实验研究

摘要

In order to construct compact free-electron laser facility, and to study on free-electron laser technology, it is necessary to develop a microwave RF gun as high-quality electron beam source. Therefore, an independently-tunable-cell (ITC) thermionic-cathode RF gun is manufactured in CAEP. Based on the preliminary power test results obtained before, more experiments are launched and experimental results are examined in depth by improving experimental environment and optimizing experimental parameters. The experimental results show that, a beam intensity over 500 mA can be measured at exit of the RF gun, and the back electron bombardment can be changed with adjustment of phase and amplitude of the electric field in the first cavity. At present, the thermionic-cathode RF gun has had applications in compact free-electron laser facility already.%为了研制紧凑型自由电子激光装置,开展自由电子激光太赫兹技术研究,需要研制微波电子枪作为高品质电子束源,为此,中国工程物理研究院研制了独立调谐热阴极微波电子枪.在前期进行了初步热测实验的基础上,通过改进实验环境、优化实验参数,进一步开展大量实验,深入研究了热阴极微波电子枪的热测实验结果.实验结果表明:微波电子枪出口处束流强度可超过500 mA,电子反轰效应随着首腔电场的相位和幅度调节发生显著变化.该热阴极微波电子枪已经应用于紧凑型自由电子激光装置.