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We have developed and successfully demonstrated the "point projection absorption spectroscopy (hereafter abbreviated to PPAS)" technique to record keV X-ray absorption spectra in the coronal region of laser produced aluminum plasma which provides spatial information in the corona. Absorption spectrum of the Al Ⅻ 1s2-1s2p resonant line for time delays up to 250, 500 and 750 ps after the peak of the incident laser pulse have been observed. Analysis of an absorption spectrum should allow a high spatial resolution (< 25μm) history of the absorbing ion population density to be determined. The 1-D hydro-code JB19 has been used to simulate the experiment and the predictions are compared to the observations. Such comparison can be useful in validating parts of the codes used for gain prediction on recombination X-ray laser transitions. 相似文献
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本文报道在六路钕玻璃激光装置上进行线聚焦激光辐照平面靶及柱型细丝靶实验所取得的结果。 六路玻璃激光装置中的一束激光或是由其两束激光合并而成的一束激光,经柱面透镜-非球面透镜组合而聚焦到靶上,焦线长度约为3~4mm,而宽度约为70~140μm。1064nm激光脉冲的宽度(FWHM)一般为250ps,靶上的平均激光强度处在10~(12)~4×10~(13)W/cm~2的范围。使用了各类材料(低Z,中Z及高Z)构成的平面靶、分段(如C-Au)平面靶和柱型细丝靶。有专门的光学诊断系统以拍摄沿平面靶镜向反射方向发射的基频(1064nm)光与 相似文献
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