A directional wide-energy neutron monitor probe

A monitor and neutron technology, applied in the field of directional wide-energy neutron monitor probes, can solve the problems of low-energy range response decline, no orientation, and wide-energy neutron monitor design, etc., and achieve good angular response and high-energy neutron monitor. Respond to the desired effect

Inactive Publication Date: 2018-02-09
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The response is relatively consistent in the energy range of 2.4-14MeV, but adding a moderator to the front of the detector will inevitably lead to a decrease in the response of the low-energy section
[0006] It can be seen that the above-mentioned publicly reported technical solutions do not provide a directional, wide-energy neutron monitor design. From the design structure, some adopt the method of increasing the moderation depth to improve the high-energy neutron response, and some adopt the Adding Spallation Reaction Compensation Material to Improve High Energy Neutron Response

Method used

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  • A directional wide-energy neutron monitor probe
  • A directional wide-energy neutron monitor probe

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Embodiment Construction

[0026] Below in conjunction with accompanying drawing, the embodiment of the present invention is further described:

[0027] refer to figure 1 As shown, the structure and layout of a directional wide-energy neutron monitor probe are thermal neutron sensitive detector 1, inner moderator 2, proliferation layer 3, inner moderator 2, Reflective layer 4, inner moderator 2, absorber 5, outer moderator 6 and outer packaging 8. That is, the inner moderator 2 is embedded with a proliferation layer 3 and a reflection layer 4 .

[0028] The central thermal neutron sensitive detector 1 is a cylinder, located at the center of the neutron monitor probe, with a length of 10cm-40cm and an outer diameter of 12mm-80mm.

[0029] The proliferation layer 3 is in the shape of a barrel with an opening on the incident surface, embedded in the inner moderator 2 outside the thermal neutron detector, with a length of 10cm-40cm and a wall thickness of 3mm-20mm.

[0030] The reflective layer 4 is in t...

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Abstract

The invention relates to a directional wide-energy neutron monitor probe, which is suitable for directional neutron field monitoring and metering transfer of high-energy accelerators and reactors. The probe comprises a thermal neutron-sensitive detector (1), an inner moderator (2), a multiplication layer (3), a reflection layer (4), an absorber (5), an outer moderator (6), Cadmium cap (7), outer package (8) and one-way incident surface (9). The neutron monitor of the present invention can solve the problems of on-line monitoring and magnitude transfer of the high-energy broad-spectrum neutron radiation field. The neutron monitor probe adopts a directional moderation type design. By embedding fission metal materials in the moderator, the n,f) fission reaction to broaden the measurement range of high-energy neutrons, by embedding neutron-reflecting materials in the moderator, the angular response and energy response can be improved, with novel structure, wide range of neutron energy monitored, and angular response characteristics good features.

Description

technical field [0001] The invention relates to the technical field of neutron monitor probes, in particular to a directional wide-energy neutron monitor probe, which is applicable to neutron directional site monitors and metering transfers of high-energy accelerators and reactors. Background technique [0002] Neutron monitors, consisting of thermal neutron detectors placed in paraffin or polyethylene cavities, are commonly used to monitor neutron fluence rates. For example, the long neutron counter, because of its simplicity, reliability, strong directionality, good neutron energy response, and strong n and γ discrimination ability, is widely used as a secondary standard for neutron fluence rate measurement. plays an important role. [0003] The famous long neutron counters are Hanson and De Pangher type. The Hanson-type long neutron counter is mainly composed of BF 3 Proportional counter, inner and outer cylindrical paraffin moderator and B 2 o 3 Absorbent layer comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T3/00
Inventor 李雅男李桃生M.穆罕默德吴宜灿
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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