Large-area beta detector with multi-region window and manufacturing method

A technology of β detectors and manufacturing methods, which is applied in the field of large-area radiation detectors, can solve problems such as large background, poor β detection performance, and elevated detection limit, and achieve the effect of reducing measurement errors

Pending Publication Date: 2021-01-29
中国兵器装备集团自动化研究所有限公司
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing large-area β detection performance of the single-region window is poor, and the background is large, which leads to an increase in the detection limit and many unnecessary radiation protection operations. The large-area β detector and its manufacturing method solve the problems of improving the accuracy of β detection position discrimination and measurement performance

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  • Large-area beta detector with multi-region window and manufacturing method
  • Large-area beta detector with multi-region window and manufacturing method
  • Large-area beta detector with multi-region window and manufacturing method

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Embodiment 1

[0024] Embodiment 1 is a large-area β detector with multi-region windows, and the side cross-sectional view of the β detector is shown in figure 1 As shown, the front top view is shown as figure 2 shown.

[0025] Working principle: By using the ray conversion layer 1 made of plastic flashes with different luminescence decay times, the ray is converted into visible light, and then collected into the photomultiplier tube 3 through the light guide cavity 2, where photoelectric conversion and multiplication occur, and different widths are generated. The current pulse forms voltage signals with different rise times on the subsequent measurement circuit, and combines with the time measurement circuit to analyze the β event measured at the corresponding position on the detector.

[0026] This embodiment 1 uses τ 1 , τ 2 , τ 3 Three scintillators with luminous decay time are fixed on a 1mm thick transparent plexiglass substrate with optical epoxy resin as a conversion layer. The ...

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Abstract

The invention discloses a large-area beta detector with a multi-region window and a manufacturing method. The large-area beta detector comprises a protective net cover, a protective layer, a reflective layer, a light guide cavity, a ray conversion layer and a photomultiplier. The ray conversion layer comprises a plurality of regions, a scintillator is arranged in each region, the scintillators indifferent regions have different luminescence decay time constants, and the plurality of regions are sequentially arranged according to the luminous decay time of the scintillators. According to the invention, the scintillators with different light-emitting decay time are used for manufacturing the ray conversion layer, rays are converted into visible light, the visible light is gathered to the photomultiplier through the light guide cavity, photoelectric conversion is carried out, current pulses with different widths are generated, voltage signals with different rise time are formed on a subsequent measurement circuit, and a beta event measured at a corresponding position on the detector is analyzed through a time measurement circuit.

Description

technical field [0001] The invention relates to the field of large-area radiation detectors, in particular to a large-area beta detector with multi-region windows and a manufacturing method. Background technique [0002] The basic working principle of the large-area plastic scintillation β detector is that when the plastic scintillation sheet of the detector is subjected to ionizing radiation, it emits visible light (the decay time is determined by the material), which is reflected by the light guide cavity and collected to the photocathode of the photomultiplier tube, and then converted Multiplies the output current pulses for collection, analysis and recording of subsequent circuits. [0003] Large-area plastic flash β detector is a new type of radiation detector developed after 2005. Because of its advantages of high detection efficiency, strong output signal, easy to enlarge the detection area, and strong environmental adaptability, it is currently widely used on human b...

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Application Information

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IPC IPC(8): G01T1/20G01T1/208
CPCG01T1/20G01T1/208
Inventor 姚飞张锐侯鑫胡恒崧廖鹏
Owner 中国兵器装备集团自动化研究所有限公司
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