高压技术对现代科学非常重要, 因为它提供了对物理系统的一个新维度的控制。 高压技术对很多重要学科的发展产生了深远的影响，比如地球物理学、地质学、凝聚态物理、材料工程，还有环境和能源科学。高压技术和各种同步辐射线站方法的结合产生了非常多的科学发现和成果。近年来高压下液体、准晶、超硬材料、金属玻璃和纳米材料等体系的性质引起了人们广泛的关注。对于这些系统的研究，需要用到所谓的原子对分布函数（PDF）方法，因为目前只有PDF方法才能揭示原子/离子从短程一直到中程纳米尺度的局域结构。目前国际上在高压领域和同步辐射领域都有很大的兴趣和需求来发展高压下的PDF方法。申请人已经在上海光源发展成功非常高质量的常规PDF方法平台，申请团队成员在高能所研制成功高能X射线聚焦透镜。我们因此提出在上海光源利用聚焦的高能X射线来发展高压下的PDF方法。

High pressure technique is very important to modern science since it provides control on physics systems from a new dimension. High pressure technique affects the development of many important fields like geophysics, geology, condensed matter physics, material engineering and environmental and energy sciences. The combinations of high pressure technique and various synchrotron radiation methods.have given rise to many important science findings. There have been increasing interest to the liquid system、superhard material、 metallic glass and nano particle systems under high pressure. For these systems, the atomic pair distribution function(PDF) method plays the crucial role in unveiling the local structure of the material system since PDF is the only available method that can give the local structure from short range up to mid-range (nano meters region). Currently there are enormous interests in both the high pressure science community and synchrotron science community to combine these two techniques. Regular PDF method with collected data of very high quality has been successfully developed at Shanghai Synchrotron and the new type of high energy X-ray focusing lens was fabricated succesfully at IHEP. Here we propose to develop the PDF method under high pressure environment at Shanghai Synchrotron using the focused high energy X-ray.