A multi-band crystal spectrometer and its adjustment method

Abstract

The invention relates to a multi-band crystal spectrometer. The multi-band crystal spectrometer comprises a crystal beam splitting system, a laser-assisted sighting system and a target chamber cantilever adjusting system. Compared with the prior art, the multi-band crystal spectrometer has the advantages that compared with a common single-crystal spectrometer, the tapered crystal base design is adopted, the X-ray energy spectrum with three and even more different wave bands can be obtained in limited three-dimensional space, and the energy spectrum measurement range under a single experiment is greatly widened on the premise that the energy spectrum resolution ratio is not sacrificed; compared with the needle tip sighting mode of a common crystal spectrometer, laser-assisted sighting is adopted, and high sighting reliability is guaranteed; meanwhile, the adjusting step is simplified, the needle tip mounting and dismounting steps and other steps affecting sighting stability are omitted, and the adjusting time is saved; dark-cassette integrated design is adopted, the overall light tightness is good, no mechanical connection part is arranged on an entire crystal shell, no gaps exist, and the problem of gap light leakage possibly existing in machining is solved.

Description

technical field [0001] The invention relates to a crystal spectrometer, in particular to a multi-band crystal spectrometer and an adjustment method thereof. Background technique [0002] Crystal spectrometer is an important instrument for measuring the linear spectrum and continuous spectrum of short-wavelength radiation. It enables people to deeply understand the structure of matter and the physical process under high energy density physical conditions at the atomic scale. It is the most widely used and one of the most important diagnostic methods in the field of high energy density physics experiment research. The crystal spectrometer uses the lattice of atoms in the crystal to perform spectral analysis. The distance between atoms in the crystal is close to the wavelength of X-rays. When the incident angle of the X-ray satisfies the crystal Bragg (Bragg) condition, strong reflection will occur in a specific direction, and finally different incident The continuum of the an...

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Problems solved by technology

However, the distance between the crystal and the radiation source is reduced, and the broadening of the energy spectrum brought about by the broadening of the radiation source will lead to a decrease in the resolution of the energy spectrum, and the high-energy stray signals will also be significantly enhanced, and will occupy a large space around the target mechanism. Conducive to the design and arrangement of optical paths in large-scale comprehensive experiments

[0007] In addition, the traditional crystal spectrometer still has the following disadvantages: on the one hand, most of the entire equipment is mechanically connected, so the optical tightness of the equipment is not good, which affects the measurement of X-spectrum; Way, the installation and removal of the needle point is time-consuming, and affects the accuracy and stability of aiming

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