为了提高毛细管放电类氖氩46.9 nm软X射线激光的强度,研究了主脉冲电流波形对等离子体Z箍缩过程、激光的产生时间及激光强度的影响.通过改变主开关导通电感,实现了对主脉冲电流上升沿的改变.随着电流上升沿的增加,激光尖峰幅值减小,激光产生时间增加.实验进一步研究了平均电流变化率对激光强度的影响:在毛细管内径3 mm、管内初始气压30 Pa的情况下,产生46.9 nm激光的最佳平均电流变化率约为7.0×1011 A/s.%In order to enhance intensity of Ne-like Ar 46. 9 nm soft X-ray laser pumped by capillary discharge, influences of main current waveform on Z-pinch process, time of lasing onset and laser intensity were studied. Rise-time of main current wave-form was changed by varying conducting inductance of main switch. Experimental results with different rise-times show that am-plitude of laser spike decreases with increasing rise-time, and time of lasing onset increases with increasing rise-time. In addition, influences of average current changing rate on laser intensity were studied. When inner diameter of capillary is 3 mm and initial pressure is 30 Pa, optimum average current changing rate is about 7. 0× 1011 A/s.
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