X-ray ultrafast imaging system and method based on radiation conversion and aperture coding

Abstract

The invention provides an X-ray ultrafast imaging system and an X-ray ultrafast imaging method based on radiation conversion and aperture coding, and solves the problems that the existing ultrafast X-ray imaging technology is poor in universality, or the time resolution is in the hundred picosecond magnitude, or the framing number is limited. The system comprises an X-ray coupling module, a semiconductor chip module and a chirped pulse light generation module, wherein the X-ray coupling module is used for coupling and imaging a target X-ray signal on the semiconductor chip module; the semiconductor chip module is used for converting X-ray intensity space-time distribution into chip refractive index space-time distribution; the chirped pulse light coupling module is used for irradiating linear chirped pulse light generated by the chirped pulse light generation module to the semiconductor chip module and coupling pulse light reflected by the semiconductor chip module into the phase extraction module; the aperture coding framing reading module is used for projecting the linear chirp light intensity space-time distribution information signal output by the phase extraction module to the data acquisition module; and the image processing module is used for processing an image output by the data acquisition module.

Description

technical field [0001] The invention belongs to the field of ultrafast imaging, in particular to an X-ray ultrafast imaging system and method based on radiation conversion and aperture coding. Background technique [0002] X-ray ultrafast imaging technology is widely used in high-energy physics and other fields. For example, in the laser-driven inertial confinement fusion experiment, the laser drives the deuterium-tritium target pellet to implode and compress and fuse. The high temperature generated when the implosion compression reaches the maximum degree The high-density material is the core, and the symmetry of the hot spot in the core affects the fusion efficiency. Since the evolution process of the core hot spot is in the order of hundreds of picoseconds, the spontaneous X-ray spectrum can reach hard X-rays. Therefore, the picosecond-level time-resolved X-ray ultrafast imaging technology is useful for studying the evolution process of the core hot spot. It is indispens...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing ultra-fast X-ray imaging technology, there are or poor versatility, or the time resolution is on the order of hundreds of picoseconds, which cannot satisfy the capture of dynamic events with a time scale shorter than the order of hundreds of picoseconds, or the number of frames is limited. Technical problem, the present invention provides an X-ray ultrafast imaging system and method based on radiation conversion and aperture coding

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