Beta radiation detection device based on aluminized plastic scintillator detector

Abstract

The utility model discloses a beta radiation detection device based on an aluminized plastic scintillator detector, and belongs to the technical field of nuclear radiation measuring instruments. The photomultiplier comprises a stainless steel shell, an aluminum shell is arranged in the stainless steel shell, an aluminized plastic scintillator is arranged at the top of the aluminum shell, a photomultiplier is arranged in the aluminum shell, and the photomultiplier is located at the bottom of the aluminized plastic scintillator. According to the utility model, through the arrangement of the aluminum-plated plastic scintillator, the aluminum layer is directly deposited on the plastic scintillation sheet through the magnetron sputtering process, so that the traditional aluminum-plated film is effectively replaced, the structure of the detection device is further simplified, the production cost is also obviously reduced, and the aluminum layer and the plastic scintillator can be tightly combined through the magnetron sputtering process; compared with the prior art, extra assembling steps are avoided, manpower and material consumption is reduced, production efficiency is improved, and the durability of the detector is enhanced due to the fact that the aluminum layer is directly deposited on the surface of the plastic scintillator.

Description

TECHNICAL FIELD

[0001] The utility model relates to nuclear radiation measuring instrument technical field, concretely is beta radiation detection device based on aluminized plastic scintillator detector. BACKGROUND

[0002] The measurement of beta particles has a wide range of applications in the fields of radioactive surface contamination, PM2.5, thickness measurement, inert gas analysis, environmental and drinking water monitoring. Plastic scintillator detectors are widely used for beta particle measurement due to their strong environmental adaptability, non-hydrosoluble and easy processing into various shapes. The working principle of plastic scintillator detectors is that beta particles hit the plastic scintillator, their energy is absorbed and partially converted into fluorescent photons, which are then converted into electrical signals by a photosensitive device (such as a photomultiplier tube) for subsequent recording and processing. Traditional scintillator-based beta radiation detection devices typically include an aluminized film, a plastic scintillator, and a photomultiplier tube. The aluminized film provides a light-tight environment to prevent interference from non-scintillator light emission and maximizes the transmission of fluorescent photons to the photosensitive device. However, this design has some significant drawbacks that affect the performance and cost of the detector.

[0003] Traditional aluminized films require a complex assembly process, usually involving the use of metal or plastic supports to hold the polyester film and adding a honeycomb protective net outside the aluminized polyester film, which not only increases manufacturing costs but also makes the assembly process cumbersome. At the same time, the aluminized film is easily damaged during use, especially when subjected to mechanical stress or environmental influences, which can lead to a decrease in detector performance and increased maintenance costs. Moreover, the presence of the aluminized film sometimes hinders the entry of low-energy beta rays into the plastic scintillator, resulting in reduced detection efficiency and thus affecting the sensitivity of the detector. SUMMARY

[0004] The purpose of the utility model is to provide a beta radiation detection device based on an aluminized plastic scintillator detector, which solves the problems of aluminized film assembly difficulty and low-energy beta ray detection efficiency by depositing aluminum on the plastic scintillator sheet.

[0005] The utility model is implemented through the following technical solutions:

[0006] The utility model is a beta radiation detection device based on an aluminized plastic scintillator detector, which includes a stainless steel shell, an aluminum shell is arranged inside the stainless steel shell, an aluminized plastic scintillator is arranged at the top of the aluminum shell, a photomultiplier tube is arranged inside the aluminum shell, and the photomultiplier tube is located at the bottom of the aluminized plastic scintillator.

[0007] Further, a circuit board is installed at the bottom of the stainless steel shell, and the circuit board is electrically connected to the photomultiplier tube.

[0008] Further, the bottom of the stainless steel shell is provided with a connector, and an external interface is arranged in the connector.

[0009] Further, the connector is electrically connected with the circuit board.

[0010] Further, a steel mesh is arranged on the stainless steel shell and located at the top of the aluminized plastic scintillator.

[0011] The utility model has the following beneficial effects:

[0012] The aluminized plastic scintillator is directly deposited with an aluminum layer on the plastic scintillator sheet through the magnetron sputtering process, effectively replacing the traditional aluminized film, thereby simplifying the structure of the detection device and significantly reducing the production cost.

[0013] Of course, it is not necessary for any product implementing the utility model to achieve all the advantages mentioned above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 Fig. 2 is a schematic view of the internal structure of the stainless steel shell;

[0015] Fig. 2 Fig. 4 is a schematic view of the structure of the detection device as a whole;

[0016] Fig. 3 Fig. 6 is a signal processing circuit diagram of the plastic scintillator detector.

[0017] Fig. 1 is a schematic view of the structure of the detection device as a whole; Fig. 2 is a schematic view of the internal structure of the stainless steel shell; Fig. 3 is a schematic view of the structure of the detection device; Fig. 4 is a schematic view of the structure of the plastic scintillator detector; Fig. 5 is a schematic view of the structure of the signal processing circuit of the plastic scintillator detector; and Fig. 6 is a signal processing circuit diagram of the plastic scintillator detector. DETAILED DESCRIPTION

[0018] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0019] Please refer to Figs. 1-3The utility model provides a technical scheme: beta radiation detection device based on aluminized plastic scintillator detector, including stainless steel shell 1, the bottom of stainless steel shell 1 is installed with circuit board 6, circuit board 6 and photomultiplier 5 electric connection, through photomultiplier 5 receives the fluorescence that aluminized plastic scintillator 4 sent and converts it into electric signal, and the electric signal transmission to circuit board 6, through circuit board 6 will be converted electric signal output to subsequent signal processing system, the bottom of stainless steel shell 1 is installed with connector 7, connector 7 is provided with outer end interface 8 in, connector 7 and circuit board 6 electric connection, through the conductive terminal on outer end interface 8, circuit board 6 electric connection is to external equipment, ensure the transmission of current and signal, stainless steel shell 1 is provided with steel net 3, and the steel net 3 is located at the top of aluminized plastic scintillator 4, through the steel net 3 set up, can prevent external object or impurity and directly contact aluminized plastic scintillator 4, to avoid possible damage or pollution, and ensure that the position of aluminized plastic scintillator 4 in stainless steel shell 1 is stable, prevent its displacement due to vibration or impact, the shape of stainless steel shell 1 is cylindrical, so that the whole device presents as cylindrical probe, convenient to use, and convenient to wipe the aluminum shell 2 that stainless steel shell 1 is provided with, the top of aluminum shell 2 is provided with aluminized plastic scintillator 4, aluminized plastic scintillator 4 deposits aluminum on plastic scintillator sheet through magnetron sputtering process, replaces aluminum film, plastic scintillator selects the plastic scintillator of φ56mm * 0.5mm specification size, and the thickness is low to gamma ray response, and beta ray response is high, and the deposition thickness of aluminization is 50nm~500nm, and it is not transparent, and CR105 photomultiplier is selected for photomultiplier 5, and 1mm thick carbon fiber plate is selected for carbon fiber, and the transmittance of carbon fiber to 20keV gamma ray is more than 95%, aluminized plastic scintillator 4 receives beta radiation and emits fluorescence, and the fluorescence is transmitted to photomultiplier 5 through optical fiber, the inside of aluminum shell 2 is provided with photomultiplier 5, photomultiplier 5 is connected to power supply, and photomultiplier 5 is located at the bottom of aluminized plastic scintillator 4, in working, aluminized plastic scintillator 4 in plastic scintillator detector is irradiated by beta ray and generates fluorescence, then is transmitted to photomultiplier 5 through optical fiber, and photomultiplier 5 converts optical signal into electric signal, after the photonic of the photocathode in photomultiplier 5 receives, generates photoelectron through photoelectric effect, these photoelectrons are amplified in the tube, and finally form current pulse at anode, the current pulse is amplified through amplifier on circuit board 6, and is filtered, shaped and handled through signal processing circuit to obtain more stable signal output, and finally is collected and handled by single-chip microcomputer and is transmitted on display screen.

[0020] The preferred embodiments disclosed above are only used to help describe the utility model. The preferred embodiments do not describe all the details and do not limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. A beta radiation detection device based on an aluminized plastic scintillator detector, comprising a stainless steel shell (1), characterized in that: An aluminum shell (2) is arranged in the stainless steel shell (1), the top of the aluminum shell (2) is provided with an aluminized plastic scintillator (4), the inside of the aluminum shell (2) is provided with a photomultiplier tube (5), and the photomultiplier tube (5) is located at the bottom of the aluminized plastic scintillator (4).

2. The beta radiation detecting apparatus based on the aluminized plastic scintillator detector according to claim 1, characterized by, A circuit board (6) is installed at the bottom of the stainless steel shell (1), and the circuit board (6) is electrically connected with the photomultiplier tube (5).

3. The beta radiation detecting apparatus based on the aluminized plastic scintillator detector according to claim 2, characterized by, A connector (7) is installed at the bottom of the stainless steel shell (1), and the connector (7) is provided with an external interface (8) therein.

4. The beta radiation detection apparatus based on the aluminized plastic scintillator detector according to claim 3, characterized in that, The connector (7) is electrically connected with the circuit board (6).

5. The aluminized plastic scintillator probe based beta radiation detection apparatus of claim 2, wherein, A steel mesh (3) is arranged on the stainless steel shell (1), and the steel mesh (3) is located at the top of the aluminized plastic scintillator (4).

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