研究了脉冲HF激光与水柱表面相互作用下电信号的产生过程。电信号显示了与激光能量线性相关的峰值间有时间间隔的两峰结构,且第二个尖峰在水柱底部的蒸汽腔塌缩后出现。实验还显示电信号的幅值和激光脉冲照射过程中是否存在膨胀和挤压的薄水层密切相关。如果在电池上边缘和石英平板(石英板紧邻电池,并与水柱上表面相接)之间存在一薄水层,电信号强度会增加10倍。 The generation of electrical signals under the interaction of pulsed HF laser and water column was studied. The electrical signal shows a two-peaked structure with time intervals between the peaks that are linearly related to the laser energy, and the second peak appears after the steam chamber at the bottom of the water column has collapsed. Experiments also show that the magnitude of the electrical signal is closely related to the presence or absence of a thin layer of water that swells and extrudes during laser pulse irradiation. If there is a thin layer of water between the upper edge of the cell and the quartz plate (the quartz plate is next to the cell and meets the upper surface of the water column), the signal strength increases by a factor of 10.