阅读说明：本技术 一种小窗口表面污染探测器 (Small-window surface pollution detector ) 是由 张志勇 金紧根 刘思平 于 2020-05-26 设计创作，主要内容包括：本发明公开了一种小窗口表面污染探测器,包括探头体,所述探头体为H型腔体,左侧腔体端口用铝箔遮光处理,左侧腔体和右侧腔体之间开孔,孔中固定有塑料闪烁体,右侧腔体内部固定有印刷电路板,塑料闪烁体右侧贴上硅光电倍增管,右侧腔体端口处设有端盖,硅光电倍增管与印刷电路板之间通过导线连接,本发明能够大窗口截面探测器无法正确测量点状放射性污染物体。并且点状放射性污染定位,解决现有大窗口截面仪器未能对点状及不规则放射性污染表面测量和定位问题。(The invention discloses a small-window surface pollution detector which comprises a probe body, wherein the probe body is an H-shaped cavity, a port of a left cavity is shaded by an aluminum foil, a hole is formed between the left cavity and a right cavity, a plastic scintillator is fixed in the hole, a printed circuit board is fixed in the right cavity, a silicon photomultiplier is attached to the right side of the plastic scintillator, an end cover is arranged at the port of the right cavity, and the silicon photomultiplier is connected with the printed circuit board through a lead. And the problem that the existing large-window section instrument cannot measure and position the point and irregular radioactive pollution surfaces is solved.)

1. The utility model provides a little window surface pollution detector, includes probe body (2), a serial communication port, probe body (2) are H type cavity, and left side cavity port is handled with aluminium foil (1) shading, trompil between left side cavity and the right side cavity, is fixed with plastics scintillator (3) in the hole, and the internal portion of right side cavity is fixed with printed circuit board (5), and silicon photomultiplier (4) are pasted on plastics scintillator (3) right side, and right side cavity port department is equipped with end cover (6), is connected through wire (7) between silicon photomultiplier (4) and printed circuit board (5).

2. The small window surface contamination detector of claim 1, wherein the left cavity wall is sprayed with zinc sulfide.

3. The small window surface contamination detector of claim 2, wherein the opening between the left and right cavities is a 1mm by 1mm square hole.

4. The small window surface contamination detector of claim 1, wherein the H-shaped cavity has an inner diameter of 20 mm.

5. A small window surface contamination detector as claimed in claim 1, wherein the end cap (6) is made of a light-tight material.

6. The small-window surface contamination detector of claim 1, wherein the silicon photomultiplier tube (4) is fixed with an ultraviolet curing adhesive.

7. A small window surface contamination detector as claimed in claim 1, wherein there are two of the wires (7).

Technical Field

The invention relates to the technical field of detectors, in particular to a small-window surface pollution detector.

Background

In the process of producing and using radioactive materials, the surface of a human body and the surface of other objects are often polluted, which not only affects the health of operators, but also pollutes the surrounding environment. In order to know the degree of surface contamination of an object, a surface contamination meter was invented and manufactured to measure the surface activity of the contaminated object. Generally, there are a hand and foot surface contamination meter, a portable surface contamination meter, and the like. The detector cross-section of the common portable surface pollution instrument is divided into a circle and a square, and the detection cross-section of the instrument produced by each company is different in size, the area is less, dozens of square centimeters, and more, hundreds of square centimeters.

In surface contamination measurement, when calculating the activity concentration per unit area, the actual area of the detector window cross-section is measured and the instrument reading in count rate is converted to surface activity concentration. When the radioactive contamination surfaces are distributed irregularly, the large-size detection cross section instrument is difficult to measure the actual activity of the radioactive contamination and find the contamination position on the object surface.

Disclosure of Invention

The present invention is directed to a small window surface contamination detector that solves the problems set forth above in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a small-window surface pollution detector, includes the probe body, the probe body is H type cavity, and left side cavity port is handled with aluminium foil shading, trompil between left side cavity and the right side cavity, is fixed with the plastics scintillation in the hole, and the inside printed circuit board that is fixed with of right side cavity, silicon photomultiplier is pasted on plastics scintillation right side, and right side cavity port department is equipped with the end cover, is connected through the wire between silicon photomultiplier and the printed circuit board.

As a further scheme of the invention: and the wall of the left cavity is sprayed with zinc sulfide.

As a further scheme of the invention: the opening between the left cavity and the right cavity is a 1 mm-1 mm square hole.

As a further scheme of the invention: the inner diameter of the H-shaped cavity is 20 mm.

As a further scheme of the invention: the end cover is made of light-proof materials.

As a further scheme of the invention: the silicon photomultiplier is fixed by ultraviolet curing glue.

As a further scheme of the invention: the number of the conducting wires is two.

Compared with the prior art, the invention has the beneficial effects that: the invention can ensure that the large-window section detector cannot correctly measure the point radioactive contamination object. And the problem that the existing large-window section instrument cannot measure and position the point and irregular radioactive pollution surfaces is solved.

Drawings

FIG. 1 is a block diagram of the present invention.

In the figure: 1-aluminum foil; 2. a probe body; 3. a plastic scintillator; 4. a silicon photomultiplier tube; 5. a printed circuit board; 6. end cap, 7-lead, 8-zinc sulfide coating.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, embodiment 1: in the embodiment of the invention, the small-window surface pollution detector comprises a probe body 2, wherein the probe body 2 is processed into an H-shaped cavity, the inner diameter of the cavity is 20mm, a circle with the diameter of the cross section of a window being 20mm and approximately 3.14 square centimeters is formed, the wall of the cavity on the left side is sprayed with zinc sulfide (ZnS) to form a zinc sulfide coating 8, the port of the cavity is shaded by an aluminum foil 1, a hole is formed between the cavity and the cavity, a square hole with the diameter of 1mm x 1mm is formed, a cut plastic scintillator 3 is placed in the hole to be fixed, a silicon photomultiplier 4 is attached to the right side of the plastic scintillator and fixed by ultraviolet curing glue, a printed circuit board 5 is fixed to the cavity on the right side, and the plastic scintillator is sealed and.