摘要
在一台毛细管快放电软x射线激光实验装置上,在相同主脉冲条件下(电流峰值18—30kA,半周期80ns),通过观测放电产生的软x射线辐射,研究了该装置固有的高幅值(2—5kA)和外加的低幅值(10—20A)两种预脉冲,对聚乙烯毛细管和高纯度陶瓷毛细管(99·9%)放电的管壁烧蚀及等离子体状态的影响.采用装置固有的几kA预脉冲和聚乙烯毛细管,放电过程中产生了大量的管壁烧蚀,并且这种情况下的等离子体均匀性差,没有可能获得激光输出.而采用20A的预脉冲和高纯度陶瓷毛细管,管壁烧蚀量大大减少,预电离等离子体的均匀性好,在这种情况下,实验上利用x射线二极管观测到了激光尖峰信号.
On a capillary discharge setup lasing in Netlike Ar at 46.9nm, the ablation of capillary wall was investigated for polythene and alumina material at both of inherent 2-5kA-pre-pulse of setup and separate pre-pulse of 20A by measuring soft x ray emission from the capillary discharged. For inherent pre-pulse and polythene capillary, the ablation is too large to create uniform plasma columns and it is impossible to obtain lasing. In the case of 20A-pre-pulse and alumina capillary, the ablation decreased remarkably and the laser spike pulse was distinguished on an x-ray diode because the uniform Z-Pinch plasma column had formed.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第10期4979-4984,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60038010)
国家863计划项目(批准号:2002AA84ts23)资助的课题.~~
