Enhancement system of hard X-ray source based on density shock wave structure

Abstract

A hard X-ray source enhancing system based on a density shock wave structure comprises a linear gas nozzle, a blade module, a blade fixing base, a supporting frame and a five-dimensional moving platform, and can effectively generate a multi-stage density shock wave structure to enhance radiation of a betatron hard X-ray source. The device has the advantages of simplicity in operation, compact structure, generation of multi-level density shock wave distribution and good stability. The invention relates to the field of interaction of ultra-short and ultra-strong laser plasmas, in particular to a process of high-brightness hard X-rays accelerated and driven by laser wake field electrons, which can be used for generating a multi-level density shock wave structure and realizing repeated injection of electrons in a density falling edge process. And meanwhile, different axial propagation of laser and electron beams is driven in the density shock wave structure, so that transverse oscillation of electrons can be intensified to enhance hard X-ray radiation.

Description

technical field [0001] The invention relates to a laser wake field electron accelerator and a desktop high-brightness X-ray radiation source, in particular to an enhancement system of a hard X-ray radiation source based on a density shock wave structure. The present invention uses a linear gas nozzle to inject airflow and cuts it with a blade module to generate a density shock wave structure, so that electrons are injected multiple times in the process of density falling edge, and at the same time, the non-axial propagation of the laser and the electron beam is driven in the density shock wave structure. , which can intensify the electron lateral oscillation to enhance hard X-ray radiation. Background technique [0002] With the development of laser-driven wakefield accelerated electron beams to generate ultra-high peak brightness and ultra-short pulse X-ray sources, betatron radiation has the advantages of high peak brightness, femtosecond ultra-short pulse width, and micro...

AI Technical Summary

Problems solved by technology

Most of the existing density shock wave structures place a single blade at the nozzle exit to generate the shock wave. The direction of the blade is parallel to the laser. The lateral oscillation in the shock wave region affects the X-ray spectrum of the electron betatron radiation; in experiments, a single density convex structure can be produced by using the two-stage nozzle relative to the jet, but the experimental plan is complicated, and the relative The spatial position is finely adjusted to obtain the required density distribution, and the amplitude of the transverse oscillation of the electrons after passing through a single shock wave will gradually decrease due to the effect of the transverse focusing field of the cavity, and the enhancement effect of the transverse oscillation after passing through a single shock wave is not obvious

[0004] Although the previous schemes can also enhance the radiation of the betatron hard X-ray source, they can only provide a single-level density shock structure, and the electron injection and transverse oscillation are limited. Therefore, a structure that can generate multi-level density shock waves is needed. The enhancement system of the hard X-ray source that realizes multiple injections of electrons and enhances the lateral amplitude of the electron beam, further improves the light output of the X-ray source to meet the application requirements

Images