采用阴影法对高重复频率准分子激光器放电腔内的放电冲击波现象进行了实验研究,研究结果揭示了放电冲击波的产生以及演化过程。通过对观测结果进行分析,获得了放电冲击波的3种典型形式:横向冲击波、纵向冲击波(主电极冲击波)和预电离冲击波。估算了3种冲击波的波速,进而分析了可会受冲击波影响的重复频率。研究成果可以为高重复频率准分子放电腔的设计提供支持,尤其是可以在放电冲击波抑制结构的设计方面提供支持。

The characteristics of the discharge shock waves in high-repetition-rate excimer laser discharge chambers are experimentally investigated using the shadow method. This results represent the generation and evolution of the discharge shock waves. Thus, three typical forms of discharge shock waves, i.e., transverse, longitudinal (the main electrode shock wave), and preionization shock waves, are obtained. Further, the velocities of these shock waves are estimated, and the repetition rate at which the shock waves may effect the discharge is analyzed. The results of this study support the design of discharge-shock-wave suppression devices in high-repetition-rate discharge chambers.