详细介绍了用于北京自由电子激光器（BFEL）多腔热阴极微波电子枪的实验研究情况。通过对该微波电子枪出口脉冲电流波形和宏脉冲不同时间位置电子能谱的测量，表明该枪大大减小了电子反轰功率。实验测量得到通过α磁铁的束流强度约为200mA，束流发射度约为20-30π·mm·mmd。并且，还将实验得到的能谱与模拟结果作了比较。

The results of wakefield calculations for a collection of beamline elements in the TTF Injector II are presented. These elements include crosses, bellows, and steps in the beamline, valves and the bunch compressor. Methods to reduce the wakefield effects due to these elements are also investigated.

The interaction of low energy electrons with multimode combined intense laser beams in vacuum was studied by using three-dimensional test particle simulation. The process of interaction and the ponderomotive potential structures of some multimode combined intense laser beams are analyzed in detail. This article presents the detailed characteristics of the multimode combined intense laser-induced electron acceleration and violent bunch compression [Wang et al., Appl. Phys. Lett. 82, 2752 (2003)]. The properties of the output electron bunch are also investigated.

The ponderomotive potential structure of a multimode combined intense laser beam is studied. Using a three-dimensional test particle simulation, the interaction of slow electrons with the combined laser beam in vacuum is investigated. The calculation shows that electrons distributed on a large scale can be accelerated to relativistic energy in vacuum. A violent longitudinal bunch compression phenomenon is also presented and discussed.