A high-performance neutron collimator and its assembly method

A collimator and high-performance technology, applied in the direction of using the diaphragm/collimator, etc., can solve the problems of narrow neutron beam energy range, lower collimation performance, large beam divergence, etc., and achieve easy machining and high effect Good, high performance collimation effect

Active Publication Date: 2018-05-22
DONGGUAN NEUTRON SCI CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Generally, the straight-through neutron collimator, affected by its own structure, its inner wall will reflect neutrons to reduce the collimation performance, and the collimation distance is short, the beam divergence is large, and most of them are collimated in a non-vacuum state, and the performance is relatively good. In addition, the collimated neutron beam energy range is relatively narrow

Method used

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  • A high-performance neutron collimator and its assembly method
  • A high-performance neutron collimator and its assembly method
  • A high-performance neutron collimator and its assembly method

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Embodiment Construction

[0042] Accompanying drawing 1 is a schematic diagram of a high-performance collimator. Take this as an example to further illustrate the specific implementation of the present invention.

[0043] First complete the assembly of the collimation plug-in 2: firstly remove the top plate of the plug-in housing assembly 21 and the large end flange of the housing, and then install the blocking blocks and shielding blocks one by one from the side of the small end flange of the housing, Then install the large end flange of the plug-in housing and the top plate of the housing, then install the screws (initial screwing) and positioning pins to accurately reset the relative positions between the boards, and finally tighten all the screws.

[0044] Push the assembled collimation insert 2 into the inner cavity of the vacuum chamber assembly 1 from one end until the fixed flange at one end of the collimation insert is aligned with the embedded end face of the vacuum chamber, and then adjust t...

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PUM

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Abstract

The invention discloses a high performance neutron collimator and an assembly method thereof. The neutron collimator includes one or a plurality of monomer collimators which are in sealed connection. Each monomer collimator includes a vacuum cavity assembly and a collimator plug-in which is arranged inside the vacuum cavity assembly. The collimator plug-in includes a plug-in housing which is provided with a plurality of blocks therein. Adjacent blocks on the inner wall of the plug-in housing are provided with a shield blocks therebetween. The center of each block is provided with a through hole. The axis of the through hole superposes the axis of the plug-in housing. Compared with prior art, the neutron collimator has long collimating distance and low background, can explicitly reduce strayed / parasitic scattered neutrons so as to reduce background and increase performance.

Description

technical field [0001] The invention relates to a neutron collimator, in particular to a high-performance collimator capable of machining and its assembly method, which is characterized by long collimation distance and low background; it belongs to the field of neutron collimation and shielding field of structural design. Background technique [0002] The neutrons emitted by the neutron source are collimated through the neutron collimator to constrain the vertical and transverse angle divergence of the neutrons along the expected direction to form a neutron beam; at the same time, as the innermost beamline component, the neutron The collimator needs to shield the stray neutrons from the outside of the collimator to prevent them from entering the neutron beam and affecting the quality of the beam. The collimator has the function of collimating the passing neutrons—controlling the divergence and shielding of the neutron beam—realizing the isolation between the inside and outs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21K1/02
CPCG21K1/02
Inventor 付金煜陶举洲
Owner DONGGUAN NEUTRON SCI CENT
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