X-ray emission from plasmas formed using an excimer laser with various pulse lengths
X-ray emission from plasmas formed using an excimer laser with various pulse lengths
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使用不同脉冲长度的准分子激光器形成的等离子体的 X 射线发射
DOI：
10.1088/0022-3727/31/20/011
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
A. Dangor
中科院分区：
文献类型：
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作者：
F. Beg;S. Moustaizis;M. Tatarakis;P. Lee;A. Dyson;A. Dangor
我们报告的实验研究的影响，激光脉冲的持续时间，入射角和目标材料上的x射线产生。金属目标（铜和铝）照明皮秒和亚皮秒KrF准分子激光脉冲聚焦到最大强度的5 ps和150 fs的脉冲。由此产生的等离子体产生1 keV范围内的软X射线。铜靶照射在约5 ps的脉冲给出了最高的X-射线转换效率（1.6%）。除了软X射线，还用450 fs脉冲检测到硬X射线信号（keV）。这被认为是由于高强度亚皮秒激光脉冲与固体靶相互作用产生的快电子。
We report experiments to study the effects of the laser-pulse duration, angle of incidence and target material on x-ray generation. Metallic targets (Cu and Al) were illuminated with picosecond and sub-picosecond KrF excimer laser pulses focused to maximum intensities of with 5 ps and with 150 fs pulses. The resulting plasma produces soft x-rays in the 1 keV range. Copper targets illuminated at about with 5 ps pulses gave the highest x-ray conversion efficiency (1.6%). In addition to the soft x-rays, a hard x-ray signal ( keV) was also detected with 450 fs pulses. This is assumed to be due to the fast electrons generated by the interaction of the higher intensity sub-picosecond laser pulse with the solid target.