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中文摘要：
对飞秒激光等离子体单丝的导电性能进行空间分辨研究.在消除测量时引入的接触电阻的影响后,得到单丝电阻在280—630kΩ/cm范围.为了进一步研究单丝的导电性能,对单丝诱导放电能力进行了空间分辨测量.结果显示,最低放电阈值降低至自发放电的～50%.从每段细丝的电阻和诱导放电阈值的空间分布看出：在成丝阶段,二者的变化趋势基本一致,细丝的电阻值和放电阈值均在焦点附近出现迅速下降.将每段细丝的电阻和放电阈值相对应,建立了细丝诱导放电阈值-电阻的线性拟合关系,证实了细丝电阻对放电阈值的影响.
英文摘要：
Electric conductivity and high voltage breakdown threshold of single plasma filament generated by femtosecond laser are spatio resolved measured. The results show that the resistance of the single filament is in a range of 280-630 kΩcm after eliminating the contact resistance, and the breakdown threshold can be reduced down to - 50% of the original value in air. Furthermore, the variations of resistance and discharge threshold follow the same trend as that for the same part filament. The relation between breakdown threshold and resistance of the single filament is established.
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