利用紫外预电离横向放电和气体循环结构建立了一套放电激励重复频率HF激光装置。研究了激光器工作介质SF6/C2H6混合气体放电特性和激光输出特性，获得激光器单次运行的最佳输出参数；通过对激光器重复频率运行时不同气体流速、充电电压与气体总压条件下的放电状态和输出能量的比较，分析了激光器重复频率稳定运行的必要条件。结果表明：所研制的激光器最大单脉冲能量0.6 J，峰值功率3 MW，电光转换效率2.4%；当混合气体工作介质以3.5 m/s的流速循环时，激光器稳定运行的最高工作频率可达50 Hz，脉冲输出能量稳定在0.26 J，平均功率达到13 W。

Design and performance of a closed cycle, repetitive frequency non-chain HF laser is described. Homogeneous glow discharge is formed with UV pre-ionization and transverse discharge structure. Optimal output parameters of single pulse operation are given by investigation of discharge characteristics in SF6 /C2H6 gas mixture and output characteristics of laser pulse. Operating stability of laser device in repetition-rate mode is researched with different gas flowing velocities, charging voltage and total pressure of gas mixture. It is shown that maximal output energy of laser pulse 0.6 J and peak power 3 MW are obtained. Total efficiency of laser device is about 2.4%. When gas mixture circulating with 3.5 m/s flowing velocity, maximal running frequency of 50 Hz is obtained and operating stability keeps well. Under these conditions, each laser pulse of 0.26 J keeps stable, and average power of laser is about 13 W.