水窗波段附近激光等离子体X光辐射产生的途径  

Paths to the Production of Water Window X Ray with Laser Plasmas

作　　者：王晓方[1] 张正泉[1] 范品忠[1] 徐至展[1] 

机构地区：[1]中国科学院上海光学精密机械研究所

出　　处：《光学学报》1996年第1期45-48,共4页Acta Optica Sinica

基　　金：国家863高技术;上海市科委启明星计划资助

摘　　要：讨论了利用激光等离子体产生水窗波段Ｘ光辐射的可能途径。靶材，即原子序数的选取是决定产生这一波段辐射的基本因素。利用激光等离子体的平衡态和非平衡态特性都可在水窗波段产生高亮度Ｘ光辐射，提出利用黑体辐射来实现水窗波段Ｘ光显微成像研究的方案。就目前的泵浦激光条件，采用窄带辐射和黑体辐射可进行水窗波段Ｘ光显微成像的实验研究。利用超短脉冲与固体靶相互作用产生的黑体辐射除了可应用于水窗波段Ｘ光显微成像外，还有助于时间分辨动力学过程研究。Various approaches to the production of soft x ray in the water window (2.3-4.4 nm) and the nearby wavelength range are discussed. Atomic number of the material used as target is the most fundmental factor which affects x ray production and conversion efficiency. High intense x rays can be realized with laser plasmas in nonequilibrium or in equilibrium state, and that x rays from black body sources produced by laser plasmas in equilibrium state be used for x ray microscopy of living samples is proposed. With the present lasers, x ray microscopy can be made using narrow band emission or black body radiation from laser plasmas. The black body x ray source produced by high intense femtosecond laser interaction with solids of high atomic number is useful in time resolved spectroscopy as well as in x ray microscopy.

关 键 词：X光源 激光等离子体 水窗波段 

分 类 号：TN481[电子电信—微电子学与固体电子学] O434.1[机械工程—光学工程]