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“PPAS” X-RAY ABSORPTION SPECTROSCOPY IN LASER-PRODUCED ALUMINUM PLASMA

作者姓名：	王柳水林尊琪章辉煌何兴法王东君林康春管富义王笑琴林鸣逸韦小春候氢李家明盛家田张国平

作者单位：	High Power Laser and Physics Joint Laboratory, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800, China;High Power Laser and Physics Joint Laboratory, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800, China;High Power Laser and Physics Joint Laboratory, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800, China;High Power Laser and Physics Joint Laboratory, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800, China;High Power Laser and Physics Joint Laboratory, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800, China;High Power Laser and Physics Joint Laboratory, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800, China;High Power Laser and Physics Joint Laboratory, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800, China;High Power Laser and Physics Joint Laboratory, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800, China;High Power Laser and Physics Joint Laboratory, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800, China;High Power Laser and Physics Joint Laboratory, Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800, China;Institute of Physics, Academia Sinica, Beijing 100080, China;Institute of Physics, Academia Sinica, Beijing 100080, China;Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;Institute of Applied Physics and Computational Mathematics, Beijing 100088, China

摘要：	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.
修稿时间：	1994-01-03

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