Portable neutron detection device

Abstract

The invention relates to a portable neutron detection device. The device comprises an outer sleeve (2), as well as a neutron scintillator conversion screen (5), a photoconductive material (6), an end window photomultiplier (7) and a base (3) which are sequentially arranged in the outer sleeve (2) and are in compression fitting joint, wherein an output port (4) extruding at the outer end of the base (3) is formed at one end of the end window photomultiplier (7), and connected with a preamplifier (9), a main amplifier (10) and a multi-channel analyzer (11) in sequence through leads; a screwable protective cover (1) with an inner thread is arranged at the front end of the outer sleeve (2); the protective cover (1) and the outer sleeve (2) are made of an aluminum material; the screwing progress can be adjusted by rotating the protective cover (1); and a magnetic shielding material (8) is coated on the outer surface of the end window photomultiplier (7). The portable neutron detection device can effectively shield an outer optical signal, has high efficiency in neutron detection, and is simple in structure and convenient to carry.

Description

Technical field [0001] The invention belongs to the technical field of neutron detection, and particularly relates to a portable neutron detection device. Background technique [0002] With the rapid development of nuclear science and technology and the promotion of nuclear power plant construction, people are paying more and more attention to radioactive rays, such as X-rays, gamma rays, neutron rays and so on. Correspondingly, some devices for detecting radioactive rays have appeared. For example, the Chinese utility model patent 03209416.7 provides a gamma detector for radioactive material monitoring, which includes a scintillator, a light guide, and a photomultiplier connected in sequence in an outer cover. The tube and the amplifier, the amplifier and the photomultiplier tube are connected by a wire. The upper end surface of the scintillator and the light guide is not windowed. The lower end surface of the outer cover is fixed to the base. The lower connecting surface of the...

AI Technical Summary

Problems solved by technology

Correspondingly, some devices for detecting radioactive rays have appeared. For example, a gamma detector for monitoring radioactive substances is provided in Chinese utility model patent 03209416.7, which includes a scintillator, a light guide, and a photomultiplier connected in sequence in an outer cover. Tube and amplifier, the amplifier and the photomultiplier tube are connected by wires, the scintillator and the upper end of the light guide are not window-opened, the lower end of the outer cover is fixed to the base, and the lower connection surface of the base is provided with a plurality of shock absorbing pads arranged symmetrically. The structural feature is that the lower end surface and the periphery of the scintillator are contained by the lead plate, and are connected with the fixed support plate of the base, and the connection section between the photomultiplier tube and the amplifier is provided with the lead plate, so that the photomultiplier tube, light guide, The adjustment mechanism for scintillator compression and amplifier positioning installation, but the scintillator in this structure can only detect gamma rays and some light signals, and has no detection effect on neutron rays, and in order to shield the interference of other rays , the lead plate is used to contain it, which makes its structure more complicated

In addition, conventional neutron detection equipment, such as those used in neutron scattering experiments 3 He detectors, due to 3 He is expensive, and its external equipment is complicated and inconvenient to carry, so it is not practical

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