Directional ultrafast X-ray framing imaging device driven by femtosecond laser and its application

Abstract

The invention provides a directional ultrafast X-ray framing imaging device driven by a femtosecond laser, said device comprising: a high-power Ti:sapphire femtosecond laser, a pumping beamline, an ultrafast event sample, and n X-ray probes Beamline and X-ray imaging panels, and their applications are also provided. The device of the present invention utilizes the time-serialized femtosecond laser pulse to interact with the gas target to generate an ultra-short X-ray sequence with the same time sequence, and the X-ray sequence irradiates the ultra-fast event sequentially, and reads the transient image signal of the ultra-fast event. Single-shot imaging of unrepeatable ultrafast processes requiring sub-picosecond time resolution. The device of the present invention uses a circumferentially symmetrical non-coaxial framing imaging design scheme to minimize the difference in viewing angle of non-coaxial imaging.

Description

technical field [0001] The invention relates to the field of ultrafast X-ray imaging, in particular to a femtosecond laser-driven directional ultrafast X-ray framing imaging device and its application. Background technique [0002] In the research of physics, chemistry, and biology, it is often necessary to perform precise imaging of a process at very short time intervals to reveal the dynamic laws of these processes and then control them. Different ultrafast processes have different time characteristics, so the requirements for time resolution are also different. For example, fracture and collision processes require sub-millisecond time resolution, and excitation processes such as explosions and shock waves require sub-microsecond time resolution. Nanosecond time resolution is required for the protein folding process, and picosecond time resolution is required for the decay and migration of phonons in solids, phase solution time in liquids, and molecular vibrational relaxat...

AI Technical Summary

Problems solved by technology

For single, non-repeatable events, only ultra-fast framing imaging can be used. At present, ultra-fast framing imaging in the X-ray band is limited. The main limitations come from two aspects: one is the lack of time-serialized Ultra-fast X-ray light source, on the other hand, for the framing image of coaxial transmission, the response speed of imaging equipment limits the framing frequency. At present, X-ray imaging equipment basically operates in single-frame mode

Images