纳秒紫外激光空气电离及等离子体导电实验研究

Experiment study of air ionization and plasma channel conducting with nanosecond ultraviolet laser pulses

摘要: 为了验证纳秒紫外激光大气等离子体通道技术的可行性,采用实验方法研究了248nm远紫外激光与实验室空气的相互作用,测试了相应的电离击穿阈值;尝试建立了连续的激光等离子体电离通道,并进行了激光等离子体通道直流电传输实验,得到的数据显示,在180m J单脉冲能量作用下,连续闪光柱长度8mm,可导电区长度约20mm。结果表明,纳秒紫外激光建立连续激光等离子体导电通道是可行的。

Abstract: In order to validate the technical feasibility of air plasma channel with nanosecond ultraviolet laser,the interaction between air and 248nm ultraviolet laser was studied in laboratory.The air ionization threshold was measured in room.Continuous plasma channel was set up.The conducting experiments of plasma channel were carried out with direct current.Flash plasma channel length is about 8mm with 180mJ laser pulses.The conductive plasma channel length is about 20mm.It is possible to establish the continuous laser plasma conducting channel with nanosecond ultraviolent laser.