A kind of adjustment method of adjustable single crystal monochromator

Abstract

The invention relates to an adjusting method capable of adjusting a monocrystal monochromator. The adjusting method comprises that A) a dry type vacuum pump is used to vacuumize a vacuum chamber; B) relative positions among an open type X ray machine, a monocrystal and a detector are adjusted so that the center of an exit port of the open type X ray machine, the center of the incident port of thedetector and the center of the monocrystal are positioned in the same horizontal plane; C) the open type X ray machine is started to emit X ray, and the X ray forms first single-energy X ray after being diffracted by the monocrystal; D) the first single-energy X ray is received by the detector; E) the monocrystal and the open type X ray machine are driven to rotate in a gear linkage manner, and the X ray forms a second single-energy X ray after being diffracted by the monocrystal; F) the second single-energy X ray is received by the detector; and G) an included angle between the X ray and themonocrystal is changed, and the steps E and F are repeated to obtain single-energy X rays of different energy. The method is simple in operation, high in adjusting precision and low in errors.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to an adjustment method of an adjustable single crystal monochromator. Background technique [0002] In the research field of monoenergetic X-rays, X-rays are diffracted by a single crystal Bragg to form a single-energy X-ray, which is then captured by a detector. Among them, if Bragg diffraction is to occur, the Bragg condition must be satisfied. The Bragg condition mentioned here refers to the coherent superposition of the reflection of X-rays by a single crystal. Two different ways are usually used to consider this coherent superposition, one of which is to fix the crystal plane, X-rays are incident at different angles, and if the reflections between different crystal planes are exactly different from each other by an integer multiple of the wavelength, the coherence is strengthened; the other is The method is to only consider the crystal plane perpendicular to the incident...

AI Technical Summary

Problems solved by technology

However, the support rod linkage method is not only difficult to process the device, but also cannot be adjusted when errors occur during the adjustment process, which has a great impact on optical precision experiments

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