Neutron collimator
A collimator and neutron technology, applied in the field of high-energy physics research, can solve problems such as low work efficiency, increased cost, neutron beam current needs manual replacement of blocks, etc., to improve work efficiency, fast and accurate switching Effect
Inactive Publication Date: 2017-03-22
DONGGUAN NEUTRON SCI CENT
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Problems solved by technology
[0004] The invention provides a neutron collimator, which aims to solve the problem that the existing neutron collimator needs to manually replace the block to obtain neutron beams with different cross-sectional sizes, which leads to low work efficiency and increased cost
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[0023] The present application will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.
[0024] A kind of neutron collimator provided by this embodiment, such as figure 1 As shown, it includes a neutron collimator main body and a bracket 2 for fixing the main body. The main body includes a vacuum box 1 and a block 3 arranged in the vacuum box 1 . An inlet 11 and an outlet 12 for neutron flow to pass through are provided on both sides of the vacuum box 1 . The inside of the vacuum box 1 is provided with a stopper 3, such as figure 2 As shown, the surface of the block 3 facing the inlet 11 and the outlet 12 is provided with a plurality of through holes 30 of different cross-sections, and the through holes 30 are arranged in the horizontal direction ( figure 2 Shown in the figure are two through-holes 30 with a circular cross-section and a direction. The through-holes 30 pass through the inlet 11 and the outlet 12...
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A neutron collimator comprises a vacuum casing, a block in the vacuum casing, and a transmission assembly. The surface of the block is provided with through holes of different cross sections, and the bottom of the block is provided with a mounting base. The transmission assembly is fixedly connected with the mounting base and used for driving the block to move. By arranging the plurality of through holes of different sizes of cross sections in the block, by means of a motor and the transmission assembly, the movement of the block in the vacuum casing is precisely controlled. According to different experimental demands, a neutron beam is enabled to smoothly pass through the through holes of corresponding cross section sizes in the block, thereby obtaining neutron beams of corresponding beam spot dimensions. The transmission assembly is in the vacuum casing, a drive unit is positioned outside the vacuum casing, and the transmission assembly and the drive unit are connected through a magnetic fluid sealed transmission device, so that the movement from the outside of the vacuum casing to the inside of the vacuum casing is achieved. The block is provided with an LVDT displacement sensor which feeds back position information of the block to a control device, so that the block position can be precisely controlled, the switching of the through holes of different cross sections can be conducted rapidly and precisely, and the working efficiency is greatly improved.
Description
technical field [0001] This application relates to the field of high-energy physics research, in particular to a neutron collimator. Background technique [0002] The neutrons emitted by the neutron source are collimated through the neutron collimator to constrain the divergence of the neutrons in the longitudinal and transverse angles 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 outside of the neutron beam. It is the core component of any neutron beam engineering and scientific research device. [0003] The existing neutron collimator mainly arranges a block ...
Claims
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IPC IPC(8): G21K1/02G21K1/04
CPCG21K1/02G21K1/04
Inventor 于永积敬罕涛宁常军唐靖宇康玲
Owner DONGGUAN NEUTRON SCI CENT