毛细管放电装置主开关结构对产生软X射线激光的影响  

Influence of the Main-Switch of the Capillary Discharge Setup on Soft X-ray Laser

作　　者：赵永蓬[1] 李岩[1] 谢耀[1] 栾伯晗[1] 朱秋石[1] 程元丽[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》2006年第9期1176-1179,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金(60038010);国家863计划(863-804-7-10)资助项目

摘　　要：流过毛细管的电流,将直接影响箍缩过程中等离子体的状态,进而影响软X射线激光的产生。由于主开关的导通电感将影响电流波形,因此提出了使用不同结构的主开关电极来改变毛细管电流波形的方案,以寻找最适合毛细管放电软X射线激光产生的电流波形。实验用三种不同结构的主开关电极,观察了主开关导通电感的改变及其对电流波形的幅值和脉宽的影响。根据导通电感的估算结果,利用脉冲功率理论,计算了电流幅值和脉宽的改变情况,并与实验结果进行了比较。实验观察了电流波形的改变对软X射线激光尖峰信号的影响。实验结果表明,放电间隙为3 cm的圆环-圆盘型主开关最适合软X射线激光的输出。The current in the capillary can affect the state of the plasma in pinch process and affect the soft X-ray laser. The inductance of the main switch can change the current waveform. Therefore the scheme of changing current waveform is put forward with different main switches to find the best current waveforms, which are fit for soft Xray pumped by capillary discharge. In the experiment, three kinds of main switches are used to observe the effect of inductance on the current duration and amplitude. The inductance of main switch is estimated and the current amplitude and duration are calculated with pulse power theory. The theoretical results are compared with the experimental data. With three different main-switches, the influence of current waveforms on soft X-ray laser spike is observed. The experimental results show that the ring-disk shaped main switch, discharge distance of which is 3 cm, is fit for soft Xray laser best.

关 键 词：X射线光学 毛细管放电 布鲁姆林(Blumlein)传输线 主开关 X射线激光 

分 类 号：TN248.6[电子电信—物理电子学]