CN-121994843-A - Sample temperature and humidity control experimental device of small-angle neutron scattering spectrometer

CN121994843ACN 121994843 ACN121994843 ACN 121994843ACN-121994843-A

Abstract

The application discloses a sample temperature and humidity control experimental device of a small-angle neutron scattering spectrometer, which comprises a shell component, a heat preservation medium conveying mechanism and a reaction medium conveying mechanism, wherein the shell component comprises a shell, an incident window and an exit window, the shell is provided with an incident port, an exit port, an incident channel and a scattering channel, the incident window is arranged at the incident port, the exit window is arranged at the exit port, the incident window, the exit window and the shell jointly define a sample cavity, a heat preservation space is further arranged between the inner wall and the outer wall of the shell, the heat preservation medium conveying mechanism circularly conveys the heat preservation medium to the heat preservation space, and the reaction medium conveying mechanism circularly conveys the reaction medium with preset temperature and humidity to the sample cavity. The heat preservation medium circularly flowing in the heat preservation space surrounding the sample cavity can avoid fluctuation of temperature and humidity in the sample cavity, ensure uniformity of temperature and humidity in the sample cavity, avoid condensation of the reaction medium to generate water vapor caused by temperature change, further avoid interference with humidity, and improve accuracy of neutron scattering experimental results.

Inventors

Dou Mengjia
CHENG HUI
BAI BO
YUAN BAO
LUO WANJU
ZENG DAXING
CHENG FALIANG
ZHANG MIN
XIE SHILEI
Shang Shuangyan
HU HAITAO
ZUO TAISEN
CHENG HE
TONG XIN
HUANG ZHIQIANG
WANG JIAXIANG
SUN YUAN
YE FAN

Assignees

散裂中子源科学中心
中国科学院高能物理研究所

Dates

Publication Date: 20260508
Application Date: 20260407

Claims (10)

1. Sample temperature and humidity control experimental apparatus of little angle class neutron scattering spectrometer, its characterized in that includes: The shell assembly comprises a shell, an incident window and an emergent window, wherein the shell is provided with an incident port and an emergent port, the shell is also provided with an incident channel positioned at the outer side of the incident port and a scattering channel positioned at the outer side of the emergent port, the incident window is arranged at the incident port, the emergent window is arranged at the emergent port, the incident window, the emergent window and the shell jointly define a sample cavity, and the sample cavity is used for accommodating a sample; The heat preservation medium conveying mechanism is communicated with the heat preservation space and is used for circularly conveying heat preservation medium to the heat preservation space; And the reaction medium conveying mechanism is communicated with the sample cavity and is used for circularly conveying the reaction medium with preset temperature and humidity to the sample cavity.
2. The sample temperature and humidity control experimental device of the small-angle neutron scattering spectrometer according to claim 1, wherein the shell assembly further comprises a limiting piece, a limiting portion is arranged on the cavity wall of the sample cavity in a protruding mode, and the limiting piece is matched with the limiting portion to limit the sample.
3. The sample temperature and humidity control experiment device of the small-angle neutron scattering spectrometer according to claim 2, wherein the limiting piece is provided with a first avoidance notch, the limiting part is provided with a second avoidance notch, and the first avoidance notch and the second avoidance notch are used for avoiding neutron beams.
4. The sample temperature and humidity control experiment device of the small-angle neutron scattering spectrometer according to claim 1, wherein the shell assembly further comprises an incidence cavity cover and a scattering cavity cover, the incidence channel is formed in the incidence cavity cover, the scattering channel is formed in the exit cavity cover, the incidence cavity cover is arranged on the outer side of the incidence port and is in pressure connection with the incidence window, and the exit cavity cover is arranged on the outer side of the incidence port and is in pressure connection with the exit window.
5. The sample temperature and humidity control experiment device of the small-angle neutron scattering spectrometer of claim 4, wherein the scattering channel is in a conical shape.
6. The sample temperature and humidity control experiment device of the small-angle neutron scattering spectrometer according to claim 1, further comprising a collimating piece, wherein the collimating piece is provided with a collimating position, the collimating piece is detachably arranged on the outer side of the incident window, and the collimating piece is used for collimating neutron beams incident to the sample through the collimating position.
7. The sample temperature and humidity control experiment device of the small-angle neutron scattering spectrometer according to claim 1, further comprising a temperature and humidity sensor, wherein the shell is further provided with a mounting hole, at least part of the temperature and humidity sensor extends to the sample cavity through the mounting hole, and the temperature and humidity sensor is used for detecting the temperature and humidity of a reaction medium in the sample cavity.
8. The sample temperature and humidity control experiment device of the small-angle neutron scattering spectrometer according to claim 1, wherein the heat preservation medium conveying mechanism comprises a heat preservation medium input connector and a heat preservation medium output connector, the shell is provided with a heat preservation medium inlet and a heat preservation medium outlet, the heat preservation medium inlet and the heat preservation medium outlet are communicated with the heat preservation space, the heat preservation medium input connector is arranged at the heat preservation medium inlet, the heat preservation medium output connector is arranged at the heat preservation medium outlet, the heat preservation medium input connector is used for inputting heat preservation medium into the heat preservation space, and the heat preservation medium output connector is used for outputting the heat preservation medium in the heat preservation space.
9. The sample temperature and humidity control experiment device of the small-angle neutron scattering spectrometer according to claim 1, wherein the reaction medium conveying mechanism comprises a reaction medium input connector and a reaction medium output connector, the shell is provided with a reaction medium inlet and a reaction medium outlet, the reaction medium inlet and the reaction medium outlet are communicated with the sample cavity, the reaction medium input connector is arranged at the reaction medium inlet, the reaction medium output connector is arranged at the reaction medium outlet, the reaction medium input connector is used for inputting reaction medium into the sample cavity, and the reaction medium output connector is used for outputting the reaction medium in the sample cavity.
10. The sample temperature and humidity control experiment device of the small-angle neutron scattering spectrometer according to claim 1, wherein the shell comprises an inner shell, an outer shell, a first sealing plate and a second sealing plate, the inner shell is installed inside the outer shell and is connected with the outer shell, a gap is formed between the inner shell and the outer shell, the first sealing plate covers one side of the inner shell and one side of the outer shell and covers one side of the gap, the second sealing plate covers the other side of the inner shell and the other side of the outer shell and covers the other side of the gap, and the first sealing plate, the second sealing plate and the gap enclose to form the heat preservation space.

Description

Sample temperature and humidity control experimental device of small-angle neutron scattering spectrometer Technical Field The application relates to the technical field of small-angle neutron scattering experimental devices capable of regulating and controlling temperature and humidity, in particular to a sample temperature and humidity control experimental device of a small-angle neutron scattering spectrometer. Background Scattering is a coherent scattering phenomenon of neutrons or X-rays, used to detect changes in scattering length density within the sample in the range of a few nanometers to hundreds of nanometers. During the experiment, microstructure information of the sample can be deduced by irradiating neutrons or X-ray beams to the sample and receiving and analyzing the scattered signals with a detector. Compared with X-rays, the neutron has the characteristics of strong penetrability, no loss, magnetic moment and sensitivity to light elements, so that the neutron scattering technology is used as an important means for detecting the nanoscale structural characteristics of the material, has the advantages of excellent statistical representativeness, simplicity and convenience in manufacturing and the like, has an irreplaceable effect in the microstructure characterization of the material, and has wide application in a plurality of disciplines such as materials, chemistry, energy sources, biology and the like. The polymer film, the adhesive interface, the nano composite material and the like are very sensitive to temperature and humidity, and the research of small-angle neutron scattering of the polymer film, the adhesive interface, the nano composite material and the like requires a high-precision temperature and humidity environment so as to explore microscopic mechanisms such as water adsorption, swelling dynamics and the like of the material interface. By accurately adjusting temperature and humidity parameters, the nano structure in the sample can be controllably and reversibly adjusted, and the structural changes are observed and quantitatively analyzed in real time by means of neutron scattering technology, so that the dynamic behavior and thermodynamic process of the material under external temperature and humidity stimulus are explored. In neutron scattering experiments, the environment where a sample is located often has poor heat preservation effect, so that uniformity of temperature and humidity of the environment is affected, and accuracy of detection results is further affected. Disclosure of Invention The application aims to provide a sample temperature and humidity control experiment device of a small-angle neutron scattering spectrometer, neutron beams are incident to a sample through an incident window through an incident channel, are emitted from a scattering channel through an emergent window after being scattered by the sample, and a scattering path of neutrons is restrained through the scattering channel so as to carry out a small-angle neutron scattering experiment on the sample. The fluctuation of the temperature and humidity in the sample cavity is avoided through the heat preservation medium circularly flowing in the heat preservation space, and the accuracy of neutron scattering experimental results is improved. The application provides a sample temperature and humidity control experimental device of a small-angle neutron scattering spectrometer, which comprises: The shell assembly comprises a shell, an incident window and an emergent window, wherein the shell is provided with an incident port and an emergent port, the shell is also provided with an incident channel positioned at the outer side of the incident port and a scattering channel positioned at the outer side of the emergent port, the incident window is arranged at the incident port, the emergent window is arranged at the emergent port, the incident window, the emergent window and the shell jointly define a sample cavity, and the sample cavity is used for accommodating a sample; The heat preservation medium conveying mechanism is communicated with the heat preservation space and is used for circularly conveying heat preservation medium to the heat preservation space; And the reaction medium conveying mechanism is communicated with the sample cavity and is used for circularly conveying the reaction medium with preset temperature and humidity to the sample cavity. In an embodiment, the housing assembly further comprises a limiting part, wherein a limiting part is convexly arranged on the cavity wall of the sample cavity, and the limiting part is matched with the limiting part to limit the sample. In an embodiment, the limiting member is provided with a first avoidance notch, the limiting portion is provided with a second avoidance notch, and the first avoidance notch and the second avoidance notch are used for avoiding neutron beams. In one embodiment, the housing assembly further comprises an incidence cavity cov