Vacuum cooling-heating stage for grazing incidence X-ray small-angle scattering experiment

Abstract

The invention relates to a vacuum cooling-heating stage for grazing incidence X-ray small-angle scattering experiment, comprising: a chamber providing a closed space; a vacuum connector communicated with the closed space; a variable temperature block disposed in the closed space, wherein a cable of the variable temperature block and a liquid nitrogen access pipeline pass through a variable temperature block fixing seal window to be connected with a temperature control device outside the closed space, and the top surface of the variable temperature block is provided with two raised screw heads; a sample tray for holding a sample, wherein a plurality of angle positioning holes in central symmetry are distributed in the sample tray and angularly mate with the raised screw heads; an incident seal window and an emergent seal window facing each other and fixed to the chamber, wherein X-ray passes through the incident seal window and irradiates to the sample at the grazing incidence angle of 0-2 DEG to produce scattering X-ray, and passes through the emergent seal window into a detector. The vacuum cooling-heating stage changes the temperature of a sample through the variable temperature block and the sample tray, uniform temperature variation is ensured for the sample, and in-plane rotational experiment of the sample can also be achieved.

Description

technical field [0001] The invention relates to a variable temperature experimental device for providing a vacuum or an atmosphere state to a grazing incident sample, and more particularly to a vacuum cold and hot table for grazing incident X-ray small-angle scattering experiments. Background technique [0002] Grazing incidence small-angle X-ray scattering refers to the phenomenon that X-rays are grazing incident on the sample surface at a small angle and interact with electrons in the material to deviate in a small angle range. We usually call it small-angle scattering. The scattered X-rays are scattered in space The distribution of is closely related to the fluctuation of electron density in the material. [0003] The existing hot stage on the market can complete the small-angle X-ray scattering in-situ temperature-changing experiment of the sample under the condition of normal incidence, and can provide the sample with a vacuum or atmosphere state. The name is "a hot sta...

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Problems solved by technology

[0003] The existing hot stage on the market can complete the small-angle X-ray scattering in-situ temperature-changing experiment of the sample under the condition of normal incidence, and can provide the sample with a vacuum or atmosphere state. The name is "a hot stage for small-angle scattering experiments" in China The patent (publication number: CN104833687A) discloses a heating stage for scientific experiments, but this heating stage is used in X-ray small-angle scattering and transmission experiments, and cannot meet the physical requirements of smaller X-ray grazing incidence angles in grazing-incidence small-angle X-ray scattering experiments. Requirements, cannot be applied to grazing incidence X-ray small-angle scattering experiments

Therefore, there is no suitable experimental device for samples that need to be analyzed by variable temperature grazing incidence X-ray small angle scattering in vacuum or atmosphere.

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