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Grazing incidence experiment device for neutron small-angle scattering

An experimental device and small-angle scattering technology, which is applied in the use of wave/particle radiation for material analysis, measuring devices, instruments, etc., can solve the problems of collimation, shielding, and inapplicability of the overall structure, and achieve reliable performance, wide application prospects, The effect of simple structure

Active Publication Date: 2018-06-15
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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Problems solved by technology

The Chinese patent literature database has published a patent application titled "A Vacuum Cooling and Heating Table for Grazing Incidence X-ray Small Angle Scattering Experiments" (publication number: CN106979957A), which provides a grazing table suitable for small angle X-rays. Incidence experimental measurement device, but due to the large difference between X-rays and neutrons, the collimation, shielding and overall structure of the invention are not suitable for neutron small-angle scattering

Method used

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  • Grazing incidence experiment device for neutron small-angle scattering
  • Grazing incidence experiment device for neutron small-angle scattering
  • Grazing incidence experiment device for neutron small-angle scattering

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Embodiment 1

[0044] Such as Figure 2-Figure 6 As shown, in this embodiment, 0 is a neutron beam, the diameter of the source aperture 11 is 4 mm, the diameter of the sample aperture 13 is 2 mm, the length of the vacuum flight chamber 12 is 11 m, and the length of the neutron conduit 121 connected inside is 2 m. Get the collimation distance 11-2=9 m.

[0045] In this embodiment, the incident beam limiting device 31 and the outgoing beam limiting device 32 are connected to the fixed base 2 through a fixed bracket 310, both of which are composed of independently moving four blades and four driving devices, including horizontal The beam-limiting left switch knife 311, the horizontal beam-limiting right switch knife 312, the vertical beam-limiting upper side switch knife 313 and the vertical beam-limiting lower side switch knife 314.

[0046]In this embodiment, the multi-dimensional motion table assembly 4 includes a six-dimensional motion assembly, which is a horizontal translation assembly 4...

Embodiment 2

[0050] The implementation mode of this embodiment is basically the same as that of Embodiment 1, the difference is that the sample stage of this embodiment is suitable for measuring samples whose surface is perpendicular to the horizontal plane, Figure 7 A top view of the sample stage assembly 5 is shown. The bottom of the sample stage assembly 5 is fixed on the upper surface of the multi-dimensional motion assembly 4 and translates or rotates accordingly. The incident angle between the incident neutron beam O and the sample surface is controlled by the rotation angle of the rotation assembly 46 around the vertical axis.

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Abstract

The invention discloses a grazing incidence experiment device for neutron small-angle scattering. The device comprises a collimation assembly, a fixing base, a deep scanning beam limiting assembly, amulti-dimension motion assembly and a sample stage assembly. A reflection experiment adopted by the experiment device geometrically achieves measurement of a thin film sample small-angle scattering signal, and the adopted beam limiting assembly with the both continuously adjustable position and size of a beam limiting hole achieves deep scanning of a small-angle scattering signal on the surface layer of a large mechanical part. The grazing incidence experiment device for neutron small-angle scattering is used in cooperation with a neutron small-angle scattering spectrometer, and the small-angle neutron scattering signal inside a thin film sample and on the surface layer of the large mechanical part can be effectively measured, and meanwhile, deep scanning of a near surface layer structureof the large mechanical part can be achieved. The grazing incidence experiment device has the advantages of being simple in structure and reliable in performance, and the application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of environmental loading in neutron small-angle scattering applications, and in particular relates to a grazing incidence experimental device for neutron small-angle scattering. Background technique [0002] Small-angle neutron scattering is an effective means of non-destructive depth detection, which can detect nanometer to submicron scale structure information in solid or liquid systems, and is of great significance to materials science, biopharmaceuticals, physical research, engineering applications, etc. Conventional small-angle experiments use transmission geometry, and the measurement signal is closely related to the thickness of the sample, so it is difficult to measure the structural characteristics of the interior of the thin film sample and the surface of mechanical parts. Grazing incidence neutron small-angle scattering refers to the small-angle scattering signal that occurs when neutrons are inci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/202
CPCG01N23/202
Inventor 陈杰闫冠云孙良卫王云邹林黄朝强刘栋陈良孙光爱薛艳梅龚建
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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