Direct illumination compensation type pulse neutron detection device and system

A detection device and technology of pulsed neutrons, applied in the field of detection, can solve problems such as the decline of detector gamma discrimination ability, neutron gamma separation, serious scattering background, etc., and achieve simple structure, fast time response and fast time response speed effect

Inactive Publication Date: 2015-05-06
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

Since silicon PIN detectors are very sensitive to radiation such as neutrons and gammas, and neutrons and gammas cannot be separated in the pulsed mixed field,

Method used

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  • Direct illumination compensation type pulse neutron detection device and system
  • Direct illumination compensation type pulse neutron detection device and system
  • Direct illumination compensation type pulse neutron detection device and system

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Embodiment Construction

[0030] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] Such as figure 1 As shown, it is the direct illumination compensation type pulsed neutron detection device of the present invention, which includes two large-area silicon PIN detectors 1, 2, polyethylene conversion target 3, compensation box 4, high voltage source 5 and signal coaxial connection Device 6.

[0032] Two silicon PIN detectors 1 and 2 are arranged in parallel, and a polyethylene conversion target 3 is arranged between the two silicon PIN detectors; wherein, the input ends of the two silicon PIN detectors are connected to the high voltage source 5 respectively, and the two silicon PIN detectors The output ends of the detectors are respectively connected to the input ends of the compensation box 4 , and the output ends of the compensation box 4 are connected to the signal coaxial connector 6 .

[0033...

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Abstract

The invention relates to a direct illumination compensation type pulse neutron detection device and system. The direct illumination compensation type pulse neutron detection device includes two silicon PIN detectors (1 and 2), a conversion target (3) and a compensation box (4). The two silicon PIN detectors are parallel to each other, and the conversion target (3) is arranged between the two silicon PIN detectors. The input ends of the two silicon PIN detectors are connected with high voltage power supplies (5) respectively, and the output ends of the two silicon PIN detectors are connected with the input end of the compensation box (4). The direct illumination compensation type pulse neutron detection system includes a plurality of direct illumination compensation type pulse neutron detection devices. The direct illumination compensation type pulse neutron detection devices are arranged coaxially, interference of gamma and the scattering background can be deducted by aid of signal compensation circuits, and accordingly measured signals of neutrons can be enhanced. Aluminum sheets are additionally arranged in the middle of each detector so deduction accuracy of direct illumination signals of the detectors can be effectively improved. The direct illumination compensation type pulse neutron detection device and system are simple in structure and reliable in work.

Description

technical field [0001] The invention belongs to the detection field, and in particular relates to a direct illumination compensation type pulse neutron detection device and a detection system. The detection device can receive nuclear recoil protons from a polyethylene target, and is used for measuring 10 11 -10 15 n·cm -2 ·s -1 high-intensity pulsed neutrons. Background technique [0002] Direct illumination compensation pulsed neutron detector is a semiconductor detector sensitive to charge, it directly receives recoil protons, and the recoil protons deposit energy in the silicon PIN detector to form a current output. Since silicon PIN detectors are very sensitive to radiation such as neutrons and gammas, and neutrons and gammas cannot be separated in the pulsed mixed field, and the scattering background in the case of pulsed radiation is also very serious, resulting in the gamma of the detector Ma's ability to discriminate is reduced. In order to measure neutron signa...

Claims

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Application Information

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IPC IPC(8): G01T3/08
Inventor 张国光
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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