激励类氖氩软X射线激光的最佳放电电流波形
Optimum discharge current waveforms for pumping Ne-like Ar soft X-ray laser
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摘要: 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。Abstract: 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 waveform was changed by varying conducting inductance of main switch. Experimental results with different rise-times show that amplitude 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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Key words:
- capillary discharge /
- ne-like ar /
- soft x-ray laser /
- current waveform
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