低气压毛细管放电特性研究  

Study on Low Pressure Discharge Character of Capillary Discharge

作　　者：程元丽[1] 赵永蓬[1] 高英建 肖亦凡[1] 刘鹏[1] 王骐[1] 杨大为[2] 

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 [2]中国原子能科学研究院,北京102413

出　　处：《中国激光》2005年第1期43-48,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金(60038010);国家863计划(2002AA84ts23)资助项目

摘　　要：利用一台毛细管快放电X射线激光装置,研究了预脉冲作用下氩气和氦气在10～120Pa压强范围内对毛 细管放电的击穿特性。实验结果表明只有10～15kV放电电压才能将内径为3mm,长度为90mm的毛细管中10 ～120Pa的氩气击穿,同时电极表面的形态对击穿电位也有较大影响。对预、主脉冲作用下毛细管放电规律及Z 箍缩过程中阻抗变化规律进行了研究,发现不同长度的氩气柱在箍缩过程中的阻抗变化趋势基本相同。不同长 度、不同放电电压情况下,毛细管阻抗均达到最小值5Ω左右,同时电流达到峰值。该结果为在相同放电电压下, 对不同长度毛细管放电获得相同的电流峰值提供了可能。The breakdown characteristics of capillary discharge are measured in Ar and He gases within the pressure range from 120 Pa to 10 Pa, which is the range for lasing by capillary discharge. The experimental results indicate that at least 10 kV of discharge voltage is required for the breakdown of gas filled in a capillary of 3 mm in diameter and 90 mm in length, which is much higher than that needed in parallel electrode system. The breakdown voltage is also greatly affected by the surface shape of electrode in low pressure. Studies show that the impedances of capillary for different lengths of gas column under the different discharge voltages represent the same character. The impedances reach the same minimum of 5 Ω when the discharge currents reach the peak value, which makes it possible to obtain the same current peak value at the same discharge voltage for different lengths of capillary.

关 键 词：激光技术 毛细管放电 击穿特性 阻抗特性 X射线激光 

分 类 号：TN248.6[电子电信—物理电子学]