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Neutron monochromator shielding device

A technology of shielding device and monochromator, used in nuclear engineering, protected cells, etc., can solve the problems of complicated mechanical structure, inconvenient control and maintenance, and difficult construction, and achieve simple and stable device movement, high-angle positioning and fast speed. The effect of starting braking and turning resistance is small

Active Publication Date: 2009-12-09
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

[0005] The present invention aims at the problems of complex mechanical structure, difficult construction, inconvenient control and maintenance in the prior art, and combines the shielding effect around the monochromator and the change of the take-off angle to provide a variable take-off angle and simple structure. Practical monochromator shielding device

Method used

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  • Neutron monochromator shielding device
  • Neutron monochromator shielding device
  • Neutron monochromator shielding device

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Embodiment Construction

[0021] The technical solution of the present invention will be further elaborated below in conjunction with the accompanying drawings.

[0022] The monochromator shielding device should meet the shielding requirements around the monochromator and at the same time realize the change of the take-off angle of the monochromator. Such as figure 1 , 2 As shown, except for the neutron beam entrance tunnel 1 and exit tunnel 2, the shielding device is a closed cylindrical drum-shaped structure, and a cavity is formed in the middle to place the monochromator and the monochromator platform.

[0023] Such as figure 2 As shown, the shielding device is divided into upper, middle and lower parts, which are layered structures, which are the upper drum, the middle rotating part, and the lower drum in turn. Wherein the upper drum and the lower drum are respectively composed of three discs, which are respectively the upper layer 3, the second layer 4, the third layer 5 and the lower layer 9,...

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Abstract

The invention belongs to the technical filed of neutron scattering and discloses a shielding device of a neutron monochromator. The device has a closed cylindrical drum-shaped structure; a middle rotating part consists of a rotating tray which is provided with a gear ring and N+1 rotating preventing electromagnets, a large wedge block arranged on the rotating tray, N small division wedge blocks and a lower rotating tray bearing; the large wedge block and the rotating tray are mutually fixed together; and the N small division wedge blocks are sequentially arranged on the gap position of the large wedge block. A fixed electromagnet is arranged above the small wedge block, and the rotating preventing electromagnets and the fixed electromagnet attract the small wedge blocks when being electrified. The technical proposal provided by the invention finishes the complicated movement by the matching of software and hardware, and the structure is simple and the processing is convenient.

Description

technical field [0001] The invention belongs to the technical field of neutron scattering, and in particular relates to a shielding device for a neutron monochromator. Background technique [0002] Most experimental measurements of reactor neutron scattering must use neutrons of a specific energy or wavelength, ie, monochromatic neutrons, as probes. The monochromatization process of the white light neutron beam drawn out by the reactor is realized by the crystal monochromator placed outside the bio-shield of the reactor, that is, by changing the take-off angle 2θ between the incident beam and the exit beam of the monochromator M And get. In order to meet the shielding requirements and effectively reduce the experimental background, a shielding device must be installed around the monochromator, that is, the monochromator shielding device, which is one of the key components of the neutron scattering spectrometer. [0003] The main body of the monochromator shielding device i...

Claims

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Application Information

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IPC IPC(8): G21F7/00
Inventor 李际周李峻宏高建波陈东风刘蕴韬孙凯王洪立韩松柏李天富焦学胜余周香租勇刘荣灯刘晓龙杨建立林永明
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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