劳厄弯晶色散特性的光线追迹研究  

Study on the dispersion characteristics of Laue bent crystal by ray-tracing

作　　者：陈灿[1] 佟亚军[2] 许照乾[1] 毛定立 肖体乔[2] 

机构地区：[1]浙江省计量科学研究院,杭州310018 [2]中国科学院上海应用物理研究所嘉定园区,上海201800

出　　处：《核技术》2015年第4期1-4,共4页Nuclear Techniques

基　　金：浙江省科技厅公益技术研究工业项目(No.2013C31102);国家质检总局科技计划项目(No.2013QK057)资助

摘　　要：劳厄弯晶具有可有效降低高热负载的影响,同时对透射光可以再次利用,已作为高通量密度高能X射线(30keV以上)聚焦、准直和单色化的最有效的分光元件。研究其色散特性,对发展高性能、多用途的劳厄弯晶单色器具有重要意义。采用自行发展的光线追迹软件对劳厄弯晶的色散特性进行了深入研究,得到衍射光能量随光斑的分布情况以及利用单块劳厄弯晶获得可聚焦不同能量射线束的选取方法,并推导了双光束中心能量及带宽的一般公式,为下一步更好地应用劳厄弯晶打下了基础。Background and Purpose： The Laue bent crystal is one of the most effective optical elements for focusing, collimating and monochromating of high flux density high energy X-rays （above 30 keV）, because of its excellent performance in reducing the high heat load effectively and reusing of transmission beam directly. The dispersion characteristics is very important for developing high performance and multipurpose Laue bent crystal monochromator. Methods： Self-developed X-ray trace program was employed to study the dispersion characteristics of Laue bent crystal in aspects of diffraction, focus, etc. Results： The distribution of diffraction energy with the beam spot was obtained and the focused beams with different energies created by single Laue bent crystal were got. The general formula of center energy and energy bandwidth of the double beam was also derived. Conclusion： This research provides a basis for the further application of Laue bent crystal.

关 键 词：X射线光学 劳厄弯晶 色散特性 光线追迹 

分 类 号：TL99[核科学技术—核技术及应用]