CN204496009U - A kind of X-ray detector - Google Patents
A kind of X-ray detector Download PDFInfo
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- CN204496009U CN204496009U CN201520110956.7U CN201520110956U CN204496009U CN 204496009 U CN204496009 U CN 204496009U CN 201520110956 U CN201520110956 U CN 201520110956U CN 204496009 U CN204496009 U CN 204496009U
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- Prior art keywords
- silicon photomultiplier
- scintillation crystal
- ray detector
- lyso scintillation
- photomultiplier chip
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Abstract
The utility model discloses a kind of X-ray detector, this X-ray detector comprises yttrium luetcium silicate LYSO scintillation crystal and silicon photomultiplier chip two parts, wherein LYSO scintillation crystal is that front/rear end is foursquare rectangular parallelepiped, silicon photomultiplier chip is in square, the surface of LYSO scintillation crystal rear end face and silicon photomultiplier chip is close to, and multiple pins of silicon photomultiplier chip back are drawn by wire; LYSO scintillation crystal other surfaces except rear end face all adopt aluminium foil to encapsulate; LYSO scintillation crystal and silicon photomultiplier chip two channel floor adopt thermal contractible plastic pipe to encapsulate.Utilize the utility model, the optically-coupled achieving LYSO scintillation crystal detectors and silicon photomultiplier encapsulates, and then the machinery both having achieved both is fixing and photon coupling, has again that inside and outside photon completely cuts off, the beneficial effect of light shield to external world simultaneously.
Description
Technical field
The utility model relates to X-ray detection technical field, especially a kind of X-ray detector.
Background technology
In the scintillation detector being applied to X-ray detection, yttrium luetcium silicate (LYSO) scintillation crystal has high luminous intensity, and response is fast, and not easily deliquescence, is considered to the inorganic scintillation crystal that combination property is best.With the electrooptical device of flash detection adaptation, silicon photomultiplier (SiliconPhotomultiplier, SiPM or Multi-pixel Photon Counter, MPPC) there is gain high, volume is little, operating voltage is low, and the insensitive feature of electromagnetism, is considered to the developing direction of following photomultiplier.
Because detector physical characteristics determines the necessary strict separation of inside and outside photon, and silicon photomultiplier transit must closely be connected with LYSO scintillation crystal rear end face, this directly determines the detection performance of detector, so, how LYSO scintillation crystal detectors and silicon photomultiplier are packaged together all the time, forming the complete integral compact ray detector with good X-ray detection ability, is the technical barrier that industry needs solution badly.
Utility model content
(1) technical matters that will solve
In view of this, fundamental purpose of the present utility model is to provide a kind of X-ray detector, encapsulate with the optically-coupled realizing LYSO scintillation crystal detectors and silicon photomultiplier, and then the machinery both having realized both is fixing and photon coupling, have again that inside and outside photon completely cuts off, the beneficial effect of light shield to external world simultaneously.
(2) technical scheme
For achieving the above object, the utility model provides a kind of X-ray detector, this X-ray detector comprises LYSO scintillation crystal and silicon photomultiplier chip two parts, wherein LYSO scintillation crystal is that front/rear end is foursquare rectangular parallelepiped, silicon photomultiplier chip is in square, the surface of LYSO scintillation crystal rear end face and silicon photomultiplier chip is close to, and multiple pins of silicon photomultiplier chip back are drawn by wire; LYSO scintillation crystal other surfaces except rear end face all adopt aluminium foil to encapsulate; LYSO scintillation crystal and silicon photomultiplier chip two channel floor adopt thermal contractible plastic pipe to encapsulate.
Preferably, this LYSO scintillation crystal is of a size of 3mm × 3mm × 11mm; This silicon photomultiplier chip is of a size of 3mm × 3mm; The back side of this silicon photomultiplier chip silicon photomultiplier chip has multiple pin, and each pin is connected with wire.
Preferably, Tai Weike (tyvek) paper or enhanced specular reflectivity film (EnhancedSpecular Reflector, ESR) is adopted to replace the described aluminium foil encapsulating LYSO scintillation crystal other surfaces except rear end face and adopt.
(3) beneficial effect
As can be seen from technique scheme, the utility model has following beneficial effect:
1, this X-ray detector that provides of the utility model, the optically-coupled achieving LYSO scintillation crystal detectors and silicon photomultiplier encapsulates, and then the machinery both having achieved both is fixing and photon coupling, have again that inside and outside photon completely cuts off, the beneficial effect of light shield to external world simultaneously.
2, this integral compact X-ray detector that provides of the utility model, have compact conformation, small volume skilful, can realize light shield, light isolation performance strong, there is certain interior poly-tension force increase scintillator and the adhesion of silicon photomultiplier, be conducive to photon and be coupled.
3, this integral compact X-ray detector that provides of the utility model, after encapsulation, overall size is no more than 5mm × 5mm × 25mm (not adding lead-in wire), both independently can use by single detector, be also conducive to multiple detector composition array detection system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the X-ray detector according to the utility model embodiment;
Fig. 2 is the structural representation of LYSO scintillation crystal and silicon photomultiplier chip in X-ray detector shown in Fig. 1;
Fig. 3 is the inner structure schematic diagram of X-ray detector shown in Fig. 1;
Fig. 4 is the method flow diagram encapsulated the X-ray detector shown in Fig. 1 according to the utility model embodiment;
Fig. 5 is the Cs137 gamma radiation source power spectrum that the X-ray detector measurement using the method for packing shown in Fig. 4 to obtain obtains;
Fig. 6 uses the X-ray detector measurement that obtains of the method for packing shown in Fig. 4 to obtain X ray signal under small throughput;
Fig. 7 uses the X-ray detector measurement that obtains of the method for packing shown in Fig. 4 to obtain X ray signal under high flux.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the utility model is further described.
As shown in Figure 1, Fig. 1 is the structural representation of the X-ray detector according to the utility model embodiment, this X-ray detector mainly comprises LYSO scintillation crystal 1 and silicon photomultiplier chip 5 two parts, wherein the photon coupling sensitive face 4 of silicon photomultiplier chip 5 is agreed with mutually with LYSO scintillation crystal 1 rear end face size, photon just can amplify after entering this photon coupling sensitive face 4, form electric signal, thus be detected.Pad 6 is in order to weld silicon photomultiplier chip 5 and LYSO scintillation crystal 1, and Reference numeral 7 is signal and the electric power conductor of silicon photomultiplier.LYSO scintillation crystal 1 and silicon photomultiplier chip 5 are as shown in Figure 2, LYSO scintillation crystal 1 is that front/rear end is foursquare rectangular parallelepiped, the end face of silicon photomultiplier chip 5 is in square, the LYSO scintillation crystal 1 rear end face sensitive face 4 that is coupled with the photon of silicon photomultiplier chip 5 is close to, and multiple pins at silicon photomultiplier chip 5 back side are drawn by wire 7; LYSO scintillation crystal 1 other surfaces except rear end face all adopt aluminium foil 2 to encapsulate; LYSO scintillation crystal 1 and silicon photomultiplier chip 5 two channel floor adopt thermal contractible plastic pipe 3 to encapsulate.
Further, in order to the structure of the X-ray detector of display the utility model embodiment clearly, Fig. 3 shows the inner structure schematic diagram of X-ray detector shown in Fig. 1.In Fig. 3, X ray 8 excites LYSO scintillation crystal 1 to send photon after being irradiated to the X-ray detector 9 that the utility model provides, and photon can amplify after entering the photon coupling sensitive face 4 of silicon photomultiplier chip 5, forms electric signal, thus is detected.
In the present embodiment, this LYSO scintillation crystal is of a size of 3mm × 3mm × 11mm; This silicon photomultiplier chip is of a size of 3mm × 3mm; The back side of this silicon photomultiplier chip silicon photomultiplier chip has multiple pin, and each pin is connected with wire.
In actual applications, the size of LYSO scintillation crystal and the size of silicon photomultiplier chip also can adopt other arbitrary dimensions, and the size of the two can phase coadaptation.The silicon photomultiplier size of general manufacturer has 1mm × 1mm, 2mm × 2mm, 3mm × 3mm and 6mm × 6mm, LYSO scintillation crystal to ensure, and rear end face is also corresponding size, so that silicon photomultiplier close fit.
Based on the X-ray detector shown in Fig. 1 to Fig. 3, Fig. 4 is the method flow diagram encapsulated the X-ray detector shown in Fig. 1 according to the utility model embodiment, and the method comprises:
Step 1: the surface of the rear end face of LYSO scintillation crystal and silicon photomultiplier chip is close to; Wherein, this LYSO scintillation crystal is that front/rear end is foursquare rectangular parallelepiped, and its size is preferably 3mm × 3mm × 11mm; This silicon photomultiplier chip is in square, and its size is preferably 3mm × 3mm.
Step 2: all adopt aluminium foil to encapsulate on LYSO scintillation crystal other surfaces except rear end face, prevent passage of scintillation light from spilling; In this step, except employing aluminium foil, Tai Weike (tyvek) paper or enhanced specular reflectivity film (Enhanced Specular Reflector, ESR) can also be adopted to encapsulate, can prevent passage of scintillation light from spilling equally;
Step 3: each pin of silicon photomultiplier chip back is drawn by wire; Wherein, the back side of this silicon photomultiplier chip has multiple pin, and each pin is connected with wire;
Step 4: adopt thermal contractible plastic pipe to encapsulate LYSO scintillation crystal and silicon photomultiplier chip two channel floor.
This X-ray detector utilizing the utility model to provide, the optically-coupled achieving LYSO scintillation crystal detectors and silicon photomultiplier encapsulates, and then the machinery both having achieved both is fixing and photon coupling, have again that inside and outside photon completely cuts off, the beneficial effect of light shield to external world simultaneously.Below adopt the power spectrum of this X-ray detector to Cs137 radioactive source that provide of the utility model to measure, and carry out X-ray detection, to be verified the advantage of adopting the X-ray detector that encapsulates in this way and having.
The spectral measurement of experiment one, Cs137 radioactive source
This X-ray detector provided by the utility model is applied to the measurement of Cs137 radioactive source, obtain this good radioactive source gamma ray spectroscopy, as shown in Figure 5, this power spectrum is consistent with theoretical spectrum, demonstrates feasibility and the successful Application of this detector method for packing.
Experiment two, X-ray detection
This X-ray detector provided by the utility model is applied to the measurement of X ray, obtains the X ray signal under various flux, and Fig. 6 is X ray signal pulse signal under small throughput, and Fig. 7 is the signal that under high flux, signal pulse height is piled up.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. an X-ray detector, it is characterized in that, this X-ray detector comprises yttrium luetcium silicate LYSO scintillation crystal and silicon photomultiplier chip two parts, wherein LYSO scintillation crystal is that front/rear end is foursquare rectangular parallelepiped, silicon photomultiplier chip is in square, the surface of LYSO scintillation crystal rear end face and silicon photomultiplier chip is close to, and multiple pins of silicon photomultiplier chip back are drawn by wire; LYSO scintillation crystal other surfaces except rear end face all adopt aluminium foil to encapsulate; LYSO scintillation crystal and silicon photomultiplier chip two channel floor adopt thermal contractible plastic pipe to encapsulate.
2. X-ray detector according to claim 1, is characterized in that, this LYSO scintillation crystal is of a size of 3mm × 3mm × 11mm.
3. X-ray detector according to claim 1, is characterized in that, this silicon photomultiplier chip is of a size of 3mm × 3mm.
4. X-ray detector according to claim 1, is characterized in that, the back side of this silicon photomultiplier chip silicon photomultiplier chip has multiple pin, and each pin is connected with wire.
5. X-ray detector according to claim 1, is characterized in that, adopts Tai Weike paper or enhanced specular reflectivity film to replace the described aluminium foil encapsulating LYSO scintillation crystal other surfaces except rear end face and adopt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520110956.7U CN204496009U (en) | 2014-09-23 | 2015-02-15 | A kind of X-ray detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420549839 | 2014-09-23 | ||
| CN2014205498396 | 2014-09-23 | ||
| CN201520110956.7U CN204496009U (en) | 2014-09-23 | 2015-02-15 | A kind of X-ray detector |
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| Publication Number | Publication Date |
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| CN204496009U true CN204496009U (en) | 2015-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520110956.7U Expired - Fee Related CN204496009U (en) | 2014-09-23 | 2015-02-15 | A kind of X-ray detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988132A (en) * | 2014-09-23 | 2016-10-05 | 中国科学技术大学 | X-ray detector and packaging method thereof |
| CN111766620A (en) * | 2020-07-08 | 2020-10-13 | 北京卫星环境工程研究所 | Regional portable multi-terminal gamma ray monitoring system |
-
2015
- 2015-02-15 CN CN201520110956.7U patent/CN204496009U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105988132A (en) * | 2014-09-23 | 2016-10-05 | 中国科学技术大学 | X-ray detector and packaging method thereof |
| CN111766620A (en) * | 2020-07-08 | 2020-10-13 | 北京卫星环境工程研究所 | Regional portable multi-terminal gamma ray monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150722 Termination date: 20210215 |