延时对毛细管放电类氖氩46.9nm软X光激光的影响  

Influence of Delay Time on Ne-Like Ar 46.9nm Soft-X-Ray Laser in Capillary Discharge

作　　者：张兴强[1] 程元丽[1] 王骐[1] 勾宏刚[1] 

机构地区：[1]哈尔滨工业大学可调谐激光技术国家级重点实验室,黑龙江哈尔滨150001

出　　处：《中国激光》2008年第3期363-366,共4页Chinese Journal of Lasers

基　　金：国家863计划(2002AA84ts23);国家自然科学基金(60038010);哈尔滨工业大学优秀团队支持计划资助项目

摘　　要：研究了预、主脉冲延时这一敏感参量在低气压下对毛细管放电类氖氩46.9 nm软X光激光的影响。实验表明,采用长度20 cm（钼电极长4 cm）,直径3 mm的陶瓷毛细管,当主脉冲电流峰值稳定在20～21 kA,氩气气压为38 Pa时,激光输出对应的预、主脉冲延时范围为2.5μs〈τ〈12.5μs,获得较大激光输出的延时范围为3.5μs〈τ〈8.5μs,延时5.8μs时获得了最大的激光输出。随着气压的缓慢增加,出现最大激光输出的延时也逐渐增大。实验也证实了不同的气压有其特定的延时范围,但差别较小。The impact of the sensitive parameter of the delay time between pre- and main-current pulse on emission of Ne-like Ar 46.9 nm soft X ray laser in capillary discharge at low Ar pressure was investigated. The results indicate that, for ceramic capillary channel with 20 cm in length （4 cm long electrode） and 3 mm in diameter, when the main current pulse spike and Ar pressure were stabilized at 20～ 21 kA and 38 Pa respectively, the delay time r of lasing locates in the range of 2.5～12.5 μs which included the optimal smaller range of 3.5～8.5 μs with relatively larger emissions. And at delay time of 5.8μs there is the biggest laser output. Furthermore, the delay time with the maximum laser output increases gradually with Ar pressure. More detailed experiment afterwards proves that a definite Ar pressure gives out its own delay time range which generates neglectable difference with nearby delay time ranges.

关 键 词：激光技术 预-主脉冲延时 毛细管放电 软X光激光 激光输出 

分 类 号：TN248[电子电信—物理电子学]