Sample environment coupling loading device for neutron scattering

Abstract

The invention discloses a sample environment coupling loading device for neutron scattering. The device comprises a G-M refrigerator, a high pressure sample chamber, a sample tube and a piston; the high pressure sample chamber comprises an outer cylinder and an inner cylinder, two ends of the outer cylinder are open, and internal threads are arranged at positions, at the openings, of the inner wall of the outer cylinder; two ends of the inner cylinder are open, and the inner cylinder is interference fit with the outer cylinder; one end of the sample tube is open, the open end of the sample tube is downward inserted into the inner chamber of the inner cylinder to be in close fit with the inner cylinder; a plug is inserted into the cavity of the sampling tube from the opening of the sample tube, and is in close fit with the structure of the piston; the piston is inserted into the inner cylinder from the top end, and is in sliding fit with the inner cylinder, and the piston is in contactwith the bottom of the sample tube; the top opening of the outer cylinder is sealed by an upper locking nut, a central hole is arranged on the central axis of the upper locking nut, and is used for accommodating a pressurizing rod; and one end of a heat conduction cylinder column is connected with the cold head of the G-M refrigerator, and the other end of the heat conduction cylinder column is connected with the upper locking nut. The device can realize dual loading of high pressure and low temperature, and is great significance to study the change of the structure and the properties of a substance under the co-action of multi-dimensional factors in neutron scattering.

Description

technical field [0001] The present application relates to the field of sample environment loading equipment in neutron scattering applications, in particular to a sample environment coupling loading device for neutron scattering. Background technique [0002] Under low temperature conditions, the amplitude of thermal vibration and rotation of atoms in the material structure is reduced, and some materials will undergo phase transition or exhibit excellent performance. The statistical results of the British Spallation Neutron Source show that more than 60% of the neutrons Scattering experiments are done in low temperature environment. Therefore, the low temperature environment is of great significance to the research field of materials science. [0003] Under the extreme conditions of high pressure, as the pressure of the substance increases, the volume of the substance gradually decreases, and the distance between atoms or molecules gradually shortens, which promotes the cha...

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Problems solved by technology

[0006] However, there is currently no neutron scattering sample environment loading device that can simultaneously load ultra-low temperatures near absolute zero and GPa-level ultra-high pressures.

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