Co-target X-ray space-time resolution spectrographic method and its spectrograph

Abstract

The invention relates to co-target X ray space time resolution spectrum method and its instrument. The optical system of the instrument includes two elliptical crystal analyzer and an upper and subjacent channel thin gaps, their position relation accords with the theory of geometry optical of ellipse focus. The method is: the target is placed at the first focus of the ellipse, the thin gap is a the second focus of the ellipse, the spectrum detector is behind of the thin gap, uses the two elliptical crystal analyzers superposed on the first focus to carry on spectrum, the plasma X ray generated by the laser by striking the target penetrates the thin gap and is imaged by the X ray CCD camera and stripe camera after through the elliptical crystal analyzer spectrum, the X ray CCD camera takes the space resolution spectrum, the X ray stripe camera takes the time resolution spectrum. The invention can acquires the space and time resolution spectrums at the same time, and the receiving efficiency and spectrum resolution are upgraded.

Description

Technical field: [0001] The invention belongs to a common-target X-ray time-space resolution spectrometry method and a spectrometer thereof. Background technique: [0002] In the experimental research of laser inertial confinement fusion, high-power short-pulse laser targeting produces a large amount of high-temperature plasma, and a large amount of X-rays are radiated from the laser plasma, which can be used for spectroscopic measurement and plasma diagnosis. High-temperature plasma X-rays carry a large amount of useful information, which can be used to determine electron temperature, electron density, electron energy distribution, plasma expansion velocity and ionization state, etc. In addition, in the experimental study of radiation opacity, since the radiation opacity is strongly dependent on the state of matter, the high temperature state achieved by heating the matter through radiation changes rapidly with time, and at the same time, the high temperature state of matte...

AI Technical Summary

Problems solved by technology

This spectroscopic method cannot obtain the X-ray spectrum in real time because it takes a long time to load and unload the film, develop and process the data.

In addition, due to the limitation of the groove spacing, it is difficult for gratings to split short-wavelength X-rays, and this method of spectroscopy can only record spatially resolved spectra in the case of one shot.

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