X-ray production in short laser pulse interaction with rare gas clusters
X-ray production in short laser pulse interaction with rare gas clusters
复制标题
短激光脉冲与稀有气体团簇相互作用产生的 X 射线
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
D. Vernhet
中科院分区：
文献类型：
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作者：
E. Lamour;C. Prigent;J. Rozet;D. Vernhet
用绝对keV X射线测量了纳米级稀有气体团簇在强度I <10 ~（17）W·cm ~（-2）的飞秒红外激光脉冲作用下的X射线谱。在测量中特别注意，通过控制不同的参数，这些参数在激光团簇动力学中起作用，即，束腰尺寸、激光器的有效脉冲长度和能量分布以及团簇尺寸。特别是，所获得的数据显示的证据低激光强度阈值keV的X-射线生产，最佳加热时间时，通过改变脉冲持续时间在恒定的激光能量和饱和度的X-射线发射概率高于一个给定的集群大小映射集群动态。
Absolute keV x-ray measurements have been performed with nanometer size rare gas clusters submitted to femtosecond IR laser pulses at intensities I < 1017W cm-2. Special care has been taken in the measurements, by controlling the different parameters, which play a role in laser-cluster dynamics, i.e., beam waist size, effective pulse length and energy profile of the laser, and the cluster size. In particular, the data obtained show evidence of low laser intensity threshold values for keV x-ray production, an optimum heating time when mapping the cluster dynamics by varying the pulse duration at constant laser energy and a saturation in the x-ray emission probability above a given cluster size.