Ultraviolet prepulse for enhanced x‐ray emission and brightness from droplet‐target laser plasmas
Ultraviolet prepulse for enhanced x‐ray emission and brightness from droplet‐target laser plasmas
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用于增强液滴目标激光等离子体的 X 射线发射和亮度的紫外线预脉冲
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发表时间：
1996
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通讯作者：
H. Hertz
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作者：
M. Berglund;L. Rymell;H. Hertz
我们表明，紫外预脉冲显着提高了水窗的X射线发射和亮度的液滴靶激光等离子体。通过将65 mJ，120 ps，λ=532 nm的主脉冲与高达3 mJ的预脉冲相结合，发射的X射线光子通量可以增加八倍以上。得到的CVI λ= 3.37nm谱线发射大于3× 10 ~（12）光子/飞秒脉冲，相应的转换效率大于3%/线。积分光谱亮度增加了两倍，并发现达到其最大值为不同的预脉冲参数比那些导致最大光子通量。
We show that an ultraviolet prepulse significantly enhances the water‐window x‐ray emission and brightness for a droplet‐target laser plasma. By combining a 65 mJ, 120 ps, λ=532 nm main pulse with an up to 3 mJ prepulse, the emitted x‐ray photon flux may be increased more than eight times. The resulting C VI λ=3.37 nm line emission is more than 3×1012 photons/sr⋅pulse, corresponding to a conversion efficiency above 3%/line. The integrated spectral brightness is increased two times and is found to reach its maximum for different prepulse parameters than those resulting in maximum photon flux.