Association Euratom-FOM, FOM Institute for Plasma Physics "Rijnhuizen," Edisonbaan 14, 3439 MN Nieuwegein, The Netherlands.
J Xray Sci Technol. 1989 Jan 1;1(2):121-33. doi: 10.3233/XST-1989-1201.
Soft x-ray emission spectra (250-875 eV) are presented for plasmas, produced by picosecond and nanosecond frequency-doubled Nd:YAG-glass laser pulses incident on 14 different target materials. The emitted spectra have been corrected for various apparatus functions which enables a direct comparison between plasmas produced by pico- and nanosecond laser pulses. The relative integrated emission intensity as a function of Z number, obtained from the corrected spectra, shows an oscillatory behavior, with distinct maxima for those elements exhibiting a dominant line emission in our photon energy window. We found for our two pulse lengths an approximately equal conversion efficiency from laser light into x-ray photons. General suggestions are given as to what target material should be used for different applications using the laser plasma as x-ray source in the energy range Studied.
软 X 射线发射光谱（250-875eV）呈现了皮秒和纳秒倍频 Nd:YAG 玻璃激光脉冲辐照 14 种不同靶材产生的等离子体。发射光谱已针对各种仪器功能进行了校正，从而可以在皮秒和纳秒激光脉冲产生的等离子体之间进行直接比较。从校正后的光谱中获得的相对积分发射强度作为 Z 数的函数，表现出振荡行为，对于在我们的光子能量窗口中表现出主导线发射的那些元素，存在明显的最大值。我们发现，对于我们的两种脉冲长度，激光光转化为 X 射线光子的转换效率大致相等。对于使用激光等离子体作为 X 射线源在研究的能量范围内的不同应用，给出了使用哪种靶材的一般建议。
