Transmission and reflection single-stage diffraction grating spectrometer

Abstract

The invention discloses a transmission and reflection single-stage diffraction grating spectrometer, and the spectrometer comprises a slit assembly, an exhaust pipe shaped like the Chinese character Hui, a shielding pipe, a switching flange, a ball joint assembly, a grating room, a filter room, a gate valve, an X-ray CCD, and a support. Compared with the prior art, the spectrometer has the functions of a reflection grating spectrometer on the basis of a transmission grating spectrometer, achieves different functions, reduces the development cost of diagnosis equipment, and overcomes a difficulty that the transmission grating spectrometer cannot work under the strong electromagnetic interference. A quantum dot array grating, a grating shaped like the Chinese character Zhi, a spectroscopy photon screen, a correction checkerboard grating and a trapezoidal element grating are used as beam splitting elements, so the spectrometer can effectively inhibit the high-order diffraction. The high-order harmonic suppression ratio is better than 1% (high-order harmonic intensity / fundamental wave intensity), and the difficulties of difficult spectrum unfolding and spectrum unfolding errors causedby a common grating are overcame. The spectrometer has the value of popularization and application.

Description

technical field [0001] The invention relates to the field of X-ray optics, in particular to a transmission and reflection type single-stage diffraction grating spectrometer. Background technique [0002] In the study of inertial confinement fusion (ICF) driven by laser indirectly, the laser in the black cavity interacts with the plasma, and a considerable part of the laser energy is absorbed by the plasma and converted into X-ray radiation. Soft X-ray radiation accounts for the entire plasma radiation. the vast majority of. The soft X-rays radiated by the black cavity are the direct energy to drive the implosion of the DT fuel capsule. The soft X-ray energy spectrum and the time evolution process of the radiation temperature are the most important characteristic physical quantities of the black cavity radiation source. Therefore, through black cavity radiation diagnosis, it is possible to understand the physical process of laser cavity-target coupling, laser drive capabilit...

AI Technical Summary

Problems solved by technology

In order to overcome the inability of the instrument to work in complex environments such as strong electromagnetic interference, and the difficulties and errors in spectrum resolution caused by ordinary transmission gratings, it can realize the additional functions of the same set of equipment, reduce the development cost of diagnostic equipment, and provide a basis for the study of the interaction between laser and matter. provide good diagnostic equipment

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