超快硬X射线位相显微技术的研究

Ultra-fast x-ray phase-contrast imaging and table-top x-ray in-line holography have been studied. A new hard x-ray phase-contrast imaging scheme using traditional commercial x-ray tube, based on the partially coherent x-ray phase imaging theory, has been demonstrated for the first time in the world,and the research of x-ray phase-contrast imaging has been extended from two dimensions to three dimensions. Also, a new method to reconstruct object phase transmission function of diffractive x-ray phase-contrast imaging has been proposed by introducing nonlinear image restoration to this field.

利用超短超强激光与等离子体相互作用产生的超快硬Ｘ射线作为光源，演示超快硬Ｘ射线位相成像。详尽分析一般条件下的Ｘ射线位相成像，研究改善基于衍射光学的Ｘ射线位相成像质量的技术。发展可精确反演真实位相分布的算法。开展本项目的研究将使我们在硬Ｘ射线位相成像及强场物理这两个国际前沿上实现学科交叉并做出有特色的工作。