Double-crystal monochromator crystal switching mechanism

Abstract

The present invention relates to a double-crystal monochromator crystal switching mechanism to satisfy the switching of a synchrotron radiation double-crystal monochromator work crystal, and thus the monochromatic beam lines of three energy points of 2.1, 2.3 and 2.5KeV (kilo-electron volt energy unit) needed by scientific research are provided. A crystal fixed assembly is used to fix three groove crystals, through a crystal support, the crystals are fixed at the shaft ends of a spindle in a certain angle, and the three crystals are installed side by side along a spindle axis direction. Through operating a hand wheel, a screw rod is driven to rotate, the slider on the screw rod and the base of a spindle device are fixed, the motion transfer among the components of the screw rod, a linear guide rail, the spindle device and the like allows the spindle to move along the axis direction, thus the fixed crystals are switched well, and the smooth motion, accurate positioning and switching of the crystals can be realized. The positions of the movements of the crystals are accurately calibrated, an accessory component limiting block and a positioning block are added, and the safety of crystal movement and the reliability of crystal switching can be ensured. Through the comprehensive considerations and design, the precise switching of the crystals can be realized.

Description

technical field [0001] The invention relates to a crystal switching mechanism of a double crystal monochromator. Background technique [0002] The double-crystal monochromator is a key component of the synchrotron radiation device, and its function is to realize the monochromatization of the incident white light, that is, when the synchrotron radiation light is incident on the crystal surface and satisfies the Bragg diffraction conditions, the monochromatic light is diffracted by the crystal and passed through the monochromatic The optimized beam not only has a single wavelength, but its emissivity is also greatly reduced. Synchrotron radiation monochromatic light has excellent performance and is widely used in various fields. In the existing crystal mechanism, the required monochromatic light is output respectively by adjusting the Bragg angle between a single pair of flat crystals and the incident light. The disadvantage is that using a pair of flat crystals will make th...

AI Technical Summary

Problems solved by technology

The disadvantage is that using a pair of flat crystals will make the structure of the monochromator more complicated, and if the energy point changes, it will be difficult to adjust the angle; from an economic point of view, the overall cost of the monochromator using only a pair of flat crystals is relatively low. Large; according to the actual needs of research on biological cells, etc., only need to provide monochromatic beamlines with three energy points of 2.1, 2.3, and 2.5KeV

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