小能量0.35 μm激光-X射线转换研究

Study of X Ray Conversion from Disk Targets Irradiated by 0.35 μm Laser at Low Energies

以小能量０．３５μｍ激光（＜１００Ｊ）辐照盘靶（Φ６００μｍ×４μｍ），用软Ｘ射线平响应探测器测量Ｘ射线角分布（ｄＥ／ｄΩ）和Ｘ射线转换效率（ηｘ）。ｄＥ／ｄΩ＝ａ＋ｂｃｏｓθ，与角无关。ηｘ随激光入射角增加而下降。按金盘、多层膜（０．１１μｍ）金盘和ＣＨ膜（０．４μｍ）金盘顺序，ηｘ依次下降。

We have measured the X ray angular distribution ( d E/ d Ω) and X ray conversion (η x ) from a disk targets (Φ600 μm×4 μm) irradiated by 0.35 μm laser (<100 J) with soft X ray flat response detector.  d E/ d Ω=a+b cos θ is independent of φ angles. η x decreaseds with the increasing laser incident angles with respect to the target normal. η x also decreaseds when Au disk is replaced by multilayer film (0.11 μm)+Au disk or CH film (0.4 μm)+Au disk.