CN208314217U - A kind of X-ray detector - Google Patents

Abstract

The utility model discloses a kind of X-ray detectors, comprising: shell, drive end bearing bracket, rear end cap, window diaphragm, signal plug, photodiode and pressing plate；The photodiode is arranged in the photodiode slot of the housing cavity, and on the photodiode, the pressing plate is screwed the pressing plate pressure with the photodiode；The rear end face of the rear end cap and the shell is connected, the signal plug is by being fixed on the rear end cap with being connected for the rear end cap, in the housing cavity, the pin of the photodiode is connect with the core wire of the signal plug by conducting wire；The window diaphragm is arranged in the window diaphragm slot of the drive end bearing bracket, and the front end face of the drive end bearing bracket and the shell is connected.Interference of the dark current to measurement result is reduced, the interference of visible light is effectively blocked, there is very high detectivity and response range, it is simple and reliable for structure, small in size, adapt to various measurement environmental requirements.

Description

A kind of X-ray detector

Technical field

The utility model relates to X-ray detection technical field more particularly to a kind of X-ray detectors.

Background technique

X-ray detection instrument is widely used in medicine, and agricultural, Food Science, the application fields such as security and the structure of matter are ground Study carefully equal scientific research fields.The X-ray detection instrument being widely used at present includes ionisation chamber, scintillator-photomultiplier and various types of The semiconductor detector of type.Wherein ionisation chamber is widely used in high-intensitive X-ray beam detection, but its volume is big, needs attached The high voltage power supply added is to maintain its work, and structure is complicated, cost is high.

In recent years with the development of semiconductor devices, also occur semiconductor photo diode being applied to current-output type High-intensitive X-ray detector.But inventor has found that the X-ray detector is technical when realizing the utility model There are still how to reduce dark current (output of detector background when without radiation exposure), visible light interference etc. how to be overcome to ask Topic.

Summary of the invention

The purpose of this utility model is to provide a kind of X-ray detectors, above-mentioned existing in the prior art to solve Problem.

The utility model is implemented by following technical solution:

The utility model provides a kind of X-ray detector, comprising: shell, drive end bearing bracket, rear end cap, window diaphragm, signal Socket, photodiode and pressing plate；Wherein,

The photodiode is arranged in the photodiode slot of the housing cavity, and the pressing plate is pressed in the photoelectricity On diode, the pressing plate is screwed with the photodiode；The rear end face of the rear end cap and the shell is stung Connection is closed, the signal plug is by being fixed on the rear end cap with being connected for the rear end cap, in the housing cavity Interior, the pin of the photodiode is connected with the core wire of the signal plug by conducting wire；The window diaphragm setting exists In the window diaphragm slot of the drive end bearing bracket, the front end face of the drive end bearing bracket and the shell is connected.

Further, the interconnecting piece in the drive end bearing bracket and the housing forward end face is maze-type structure, the rear end cap with The interconnecting piece in the housing rear end face is maze-type structure.

Further, the rear end cap is provided with signal plug mounting hole, and the mounting hole is maze-type structure, the letter Number socket screws the insertion rear end cap by the mounting hole.

Further, front end face, the rear end face of the rear end cap and the shell of the drive end bearing bracket and the shell are equal It is screwed.

Further, the window diaphragm is beryllium piece.

Further, the photosurface of the photodiode is provided with scintillator piece.

Further, the case material uses anodic oxidation aluminum material.

By above technical scheme as it can be seen that X-ray detector provided by the embodiment of the utility model reduces dark current to survey Measure result interference, effectively block the interference of visible light, have very high detectivity, while it is simple and reliable for structure, It is small in size, adapt to the requirement of various measurement environment.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is X-ray detector component diagram provided by the utility model embodiment；

Fig. 2 is the sectional view of X-ray detector provided by the utility model embodiment；

Fig. 3 is the top view of X-ray detector provided by the utility model embodiment；

Fig. 4 is the left view of X-ray detector provided by the utility model embodiment.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts Every other embodiment obtained, fall within the protection scope of the utility model.

The term used in the utility model embodiment and is not intended to merely for for the purpose of describing particular embodiments Limit the utility model.The utility model embodiment and the "an" of singular used in the attached claims, " described " and "the" are also intended to including most forms, unless the context clearly indicates other meaning.

The technical solution of the utility model embodiment is described in detail below.

Fig. 1 is X-ray detector structural schematic diagram provided by the embodiment of the utility model.As shown in Figure 1, the X-ray Detector includes: shell 1, drive end bearing bracket 2, rear end cap 3, window diaphragm 4, signal plug 5, photodiode 7 and pressing plate 7；Wherein,

As shown in figs 2-4, photodiode 7 is arranged in the photodiode slot of 1 inner cavity of shell, and pressing plate 6 is pressed in light On electric diode 7, pressing plate 6 is screwed with photodiode 7.Rear end cap 3 and the rear end face of shell 1 are connected, letter By being connected to be fixed on rear end cap 3 with rear end cap 3, core wire protrudes into shell 1 by rear end cap 3 for number socket 5 In.Intracavitary in shell 1, the pin of photodiode 7 is connected with the core wire of signal plug 5 by conducting wire, so that photoelectricity two The pin of pole pipe 7 is drawn by signal plug 5.Window diaphragm 4 is arranged in the window diaphragm slot of drive end bearing bracket 2, drive end bearing bracket 2 and shell The front end face of body 1 is connected.

Specifically, photodiode can have different gauge sizes, and the model of photodiode has corresponding with shell Matching relationship.Photodiode may be configured with energy resolution (step-by-step counting) and noenergy differentiates (current mode) two kinds of detectors Mode.High-intensitive X-ray beam is detected, using the detector of current mode, photodiode is set in the utility model The operating mode of current mode.

In the prior art, photodiode needs to apply certain bias applied to pulse-counting mode, to improve to arteries and veins The response speed of punching to improve meter digit rate and energy resolution, but will lead to dark current in detector after applying voltage At the increase of multiple.The utility model is to counting rate and energy resolution no requirement (NR), because without being biased.Two pole of photoelectricity Pipe works in the operating mode of current mode, and the pin of photodiode 7 is directly connected with the core wire of signal plug 5, Ci Zhongying The dark current output that detector is greatly reduced with mode, effectively increases detectivity.X-ray provided by the utility model Detector can make dark current output be less than 10-11A, have very high detectivity in normal temperature state.In addition, above-mentioned knot Structure is biased due to not needing for photodiode, and also there is no need to batteries to be powered, and is simplified circuit structure, is reduced The volume of detector.

Since photodiode 7 has accordingly visible light and X-ray, it is therefore desirable to shield visible light and enter detector shell Body.Therefore, as depicted in figs. 1 and 2, the company of the interconnecting piece of drive end bearing bracket 2 and 1 front end face of shell, rear end cap 3 and 1 rear end face of shell Socket part is all made of maze-type structure, enable the rear end face of the front end face of drive end bearing bracket 2 and shell 1, rear end cap 3 and shell 1 with The mode of occlusion is connected, to block stray visible light to enter in shell.

Further, as shown in Figure 1, being provided with signal plug mounting hole on rear end cap 3, which is maze-type structure Through-hole, signal plug 5 by the mounting hole screw insertion rear end cap 3.Signal plug 5 is also to be engaged with the mounting hole Mode be connected, to block stray visible light to enter in shell.

Further, 1 material of shell uses anodic oxidation aluminum material.Compared with the shell of plastics, anodic oxidation aluminum material Shell can prevent the interference of external electromagnetic wave, improve measurement accuracy, reduce measurement error.In addition, shell 1 uses anodic oxygen The mode of change dyes black, to block stray visible light to enter in shell, the interference of visible light is shielded completely, so that detector It may operate in normal illumination environment.

Further, the use of window diaphragm 4 beryllium piece, preferably 100 μm of the thickness of beryllium piece.Due to the atomic number of beryllium element It is low, it is few to X-ray absorption, the efficiency of transmission of X-ray is improved, while being effectively blocked passing through for visible light, to realize Isolation to visible light.

Further, increase by one layer of scintillator piece in the photosurface of photodiode 7, the sound to X-ray energy can be improved Range is answered, response range can reach 100KeV.

Optionally, drive end bearing bracket 2 and the front end face, rear end cap 3 and the rear end face of shell 1 of shell 1 are screwed, from And it ensure that the leakproofness of detector.

X-ray detector provided by the embodiment of the utility model reduces interference of the dark current to measurement result, effectively The interference of visible light is blocked, there is very high detectivity and response range, while simple and reliable for structure, small in size, is fitted The requirement of various measurement environment is answered.

Finally, it should be noted that above embodiments are only to illustrate the technical solution of the embodiment of the present application, rather than it is limited System；Although the application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: its It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equal Replacement；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution various embodiments of the utility model technical side The spirit and scope of case.

Claims (7)

1. a kind of X-ray detector characterized by comprising shell, drive end bearing bracket, rear end cap, window diaphragm, signal plug, light Electric diode and pressing plate；Wherein, the photodiode is arranged in the photodiode slot of the housing cavity, the pressing plate On the photodiode, the pressing plate is screwed pressure with the photodiode；The rear end cap and the shell The rear end face of body is connected, the signal plug by being fixed on the rear end cap with being connected for the rear end cap, In the housing cavity, the pin of the photodiode is connected with the core wire of the signal plug by conducting wire；The window Membrana oralis piece is arranged in the window diaphragm slot of the drive end bearing bracket, and the front end face of the drive end bearing bracket and the shell is connected.

2. X-ray detector according to claim 1, which is characterized in that the drive end bearing bracket and the housing forward end face Interconnecting piece is maze-type structure, and the interconnecting piece in the rear end cap and the housing rear end face is maze-type structure.

3. X-ray detector according to claim 2, which is characterized in that the rear end cap is provided with signal plug installation Hole, the mounting hole are maze-type structure, and the signal plug screws the insertion rear end cap by the mounting hole.

4. X-ray detector according to claim 1-3, which is characterized in that the drive end bearing bracket and the shell Front end face, the rear end cap and the shell rear end face be screwed.

5. X-ray detector according to claim 1-3, which is characterized in that the window diaphragm is beryllium piece.

6. X-ray detector according to claim 1-3, which is characterized in that the photodiode it is photosensitive Face is provided with scintillator piece.

7. X-ray detector according to claim 1-3, which is characterized in that the case material uses anode Alumina material.