CN205246890U - Plastic scintillator detector - Google Patents
Plastic scintillator detector Download PDFInfo
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- CN205246890U CN205246890U CN201521136859.1U CN201521136859U CN205246890U CN 205246890 U CN205246890 U CN 205246890U CN 201521136859 U CN201521136859 U CN 201521136859U CN 205246890 U CN205246890 U CN 205246890U
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- photomultiplier
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Abstract
The utility model provides a plastic scintillator detector, belongs to radioactivity monitoring technology field. The problem of current plastic scintillator detector gather the inefficiency is solved. It includes barrel -type casing, two photoelectric detection units, plastic scintillator and data processing device, two photoelectric detection units be located the barrel -type casing at the both ends of barrel -type casing radial symmetry, plastic scintillator, the partial pressure is penetrated and is included bleeder circuit, amplifier and single -channel analyser along with the board, bleeder circuit's voltage signal output terminal is connected with photomultiplier's tube socket, and photomultiplier's pulse signal output is connected with the pulse signal input of amplifier, and the data signal output end of amplifier is connected with single -channel analyser's data signal input, and single -channel analyser's data signal output end is connected with voltage signal output terminal 1's voltage signal output terminal 2, and voltage signal output terminal 1's data signal output end is connected with voltage signal output terminal 5's data signal input. Mainly used is greater than the reflectivity material and monitors.
Description
Technical field
The utility model relates to a kind of detector for radioactivity monitoring, belongs to radioactivity monitoring technical field.
Background technology
Plastic scintillant is the solid appearance body of organic scitillating material in plastics, generally by matrix scitillating material and move ripple agent and form.Mostly host material is the scitillating materials such as polystyrene, and the effect that moves ripple agent is effective passage of scintillation light fast transport and prolongation. MouldMaterial scintillator is not crystal, and just organic scintillator, can be used for the spy of fast neutron, proton, several fission fragments of cosmic ray etc.Survey. It is the transparent body of preparation large volume easily, and is easily processed into various shapes, and has not deliquescence, resistance to irradiation, flickerThe advantage that die-away time is short, price is low. The normal large area plastic scintillator detector that uses in environs radiation monitoring, as greatlyThe main detecting element of area radiation monitoring, aerial survey and channel-type detection system. But, the energy resolution rate variance of plastic scintillant,Details in its power spectrum is all flooded by Compton scattering, is therefore generally only used as ionization meter, can not distinguish background and manually putPenetrating property.
In actual application, in the time that plastic scintillant is longer, at the light that the incoming particle away from produces from light bleeding pointThe light path of son arrival light bleeding point is longer, and the decay of optical signal is very serious, causes that light collection efficiency reduces, thereby causes surveyingEfficiency Decreasing, the gamma-ray detection efficiency that therefore how to improve large area plastic scintillator detector is one to be solved askingTopic.
Utility model content
The utility model is in order to solve the low problem of existing plastic scintillator detector collecting efficiency, to the invention provides onePlant plastic scintillator detector.
A kind of plastic scintillator detector, it comprises barrel-type casing, two photodetection unit, plastic scintillant and data placesReason device;
Described photodetection unit comprise case lid cover, aluminium seat, aviation socket, many springs, multiple bolt, point injection withPlate and photomultiplier;
Described aluminium seat, aviation socket, spring, bolt, a point injection are positioned at barrel-type casing with plate and photomultiplier,
Case lid cover is fixedly connected with one end of barrel-type casing, and described case lid cover center is provided with through hole,
The tight case lid cover of one side of aluminium seat, after the through hole of aviation socket through case lid cover, is fixedly connected with aluminium seat, aluminium seatOpposite side is fixed with multiple bolts, and on each bolt, all cover has a spring, divides injection with being provided with multiple locating holes on plate,Each locating hole is corresponding with a bolt, and the end of bolt inserts in corresponding locating hole, makes two of every springEnd is pressed in respectively point injection with on plate and aluminium seat, and the base of described photomultiplier is welded on point injection with on plate, and photoelectricity doublyIncrease the induction end of pipe and one end close contact of plastic scintillant, point injection is passed through wire 2-6 with the data-signal output of plateBe connected with aviation socket,
Two described photodetection unit are in the two ends of barrel-type casing radial symmetric, and plastic scintillant is positioned at barrel-type casing,
Divide injection to comprise bleeder circuit, amplifier and single-channel analyzer with plate; The voltage signal output end of bleeder circuit and photoelectricityThe base of multiplier tube connects, and the pulse signal output end of photomultiplier is connected with the pulse signal input terminal of amplifier, amplifiesThe data-signal output of device is connected with the data-signal input of single-channel analyzer, the data-signal output of single-channel analyzerBe connected with the signal input part of aviation socket, the data-signal output of aviation socket and the data-signal of data processing equipment are defeatedEntering end connects.
Described data processing equipment comprises coincide counter, adds sum counter and data processor;
Two data-signal inputs of coincide counter are all by the data-signal output of aviation socket and single-channel analyzerConnect, the data-signal output of coincide counter is connected with data processor the first data-signal input,
Add two data-signal inputs of sum counter all by the data-signal output of aviation socket and single-channel analyzerConnect, the data-signal output that adds sum counter is connected with data processor the second data-signal input.
Described barrel-type casing is cast aluminium shell.
The lateral wall of described two ends of barrel-type casing is equipped with annular groove.
Principle analysis: in the process using, radiation source is fixed on and the equidistant position, two ends of barrel-type casing,And make radiation source send gamma-rays, make the interior molecular ionization of plastic scintillant and excite, produce fluorescence, fluorescence is got to photomultiplier transitOn pipe, form photoelectron, after electronics being doubled in photomultiplier by bleeder circuit, at the anode loop of photomultiplierMiddle formation pulse signal, amplifies and processes this pulse signal shaping through amplifier, and single-channel analyzer enters the pulse signal receivingRow threshold value is screened, and examination result is delivered to data processing equipment by aviation socket and process, and completes radiation source is sentGamma-ray detection.
The radiation ray energy that the utility model discharges by plastic scintillator detector measuring radiation source, and according to its energyAmount variation characteristic obtains the contained ray energy size of radiation source, finally the parameter of measurement and calibrating parameters made comparisons, therebyDetermine whether measuring process reaches standard. The research that the form that adopts two-way to survey is carried out, measures two-way coincidence counting, with twoRoad adds with count results and deducts after coincidence counting result, then divided by 2, obtains final result of detection.
A kind of plastic scintillator detector described in the utility model is applicable to the medium containing radionuclide to supervise in real timeSurvey, and can be applicable to the detection of thing position.
The beneficial effect that the present invention brings is,
1. respectively there is an annular groove at hull outside two ends, for fixing a kind of plastic scintillant described in the utility modelDetector.
2. the base of photomultiplier and bleeder circuit are welded on a wiring board, cut down the number of intermediate links, avoided dryDisturb, improve stability.
3. between wiring board and fixing aluminium seat, add spring coil, increased between photomultiplier and probe Connection BlockCompactness.
4. in dividing potential drop circuit, adopt the components and parts such as resistance, electric capacity, transistor jointly to complete, in counting situation, reduce on an equal basisThe power consumption of detector.
5. detector high pressure, power supply, the wiring of signal separate type, is used aviation socket to connect, and can reduce in application processInterference problem.
6. carry out signals collecting by two paths of data, can ensure ray that radiation source sends in plastic scintillant when longerBetween time, reduce the attenuation of optical signal, collected at the photon that the incoming particle away from produces from light bleeding point, carryHigh light collection efficiency, and the collecting efficiency of light and certainty of measurement have all improved more than 5%.
Brief description of the drawings
Fig. 1 is the structural representation of a kind of plastic scintillator detector of the present invention.
Fig. 2 is the partial enlarged drawing of the photodetection unit described in detailed description of the invention one.
Fig. 3 is the circuit connecting relation figure of point injection with plate and data processing equipment.
Detailed description of the invention
Detailed description of the invention one: referring to Fig. 1 and Fig. 2, present embodiment is described, a kind of plastics described in present embodiment dodgeBright bulk detector, it comprises barrel-type casing 1, two photodetection unit 2, plastic scintillant 3 and data processing equipments 4;
Described photodetection unit 2 comprises case lid cover 2-1, aluminium seat 2-2, aviation socket 2-3, many spring 2-4, manyIndividual bolt 2-5, point injection are with plate 2-8 and photomultiplier 2-9;
Described aluminium seat 2-2, aviation socket 2-3, spring 2-4, bolt 2-5, point injection are with plate 2-8 and photomultiplier2-9 is positioned at barrel-type casing 1,
Case lid cover 2-1 is fixedly connected with one end of barrel-type casing 1, and described case lid Tao2-1 center is provided with through hole,
The tight case lid cover of the side 2-1 of aluminium seat 2-2, after the through hole of aviation socket 2-3 through case lid cover 2-1, with aluminium seat2-2 is fixedly connected with, and the opposite side of aluminium seat 2-2 is fixed with multiple bolt 2-5, and on each bolt 2-5, all cover has a spring2-4, point injection is with being provided with multiple locating holes on plate 2-8, and each locating hole is corresponding with a bolt 2-5, and spiral shellThe end of bolt 2-5 inserts in corresponding locating hole, makes the two ends of every spring 2-4 be pressed in respectively point injection with plate 2-8Upper with aluminium seat 2-2, it is upper with plate 2-8 that the base of described photomultiplier 2-9 is welded on point injection, photomultiplier 2-9Induction end and one end close contact of plastic scintillant 3, a point injection is passed through wire with the data-signal output of plate 2-82-6 is connected with aviation socket 2-3,
Two described photodetection unit 2 are in the two ends of barrel-type casing 1 radial symmetric, and plastic scintillant 3 is positioned at cylinder outer raceIn body 1,
Divide injection to comprise bleeder circuit 2-8-1, amplifier 2-8-2 and single-channel analyzer 2-8-3 with plate 2-8; Bleeder circuitThe voltage signal output end of 2-8-1 is connected with the base of photomultiplier 2-9, the output of pulse signal of photomultiplier 2-9End is connected with the pulse signal input terminal of amplifier 2-8-2, data-signal output and the single-channel analyzer of amplifier 2-8-2The data-signal input of 2-8-3 connects, the data-signal output of single-channel analyzer 2-8-3 and the letter of aviation socket 2-3Number input connects, and the data-signal output of aviation socket 2-3 is connected with the data-signal input of data processing equipment 4.
Present embodiment, bleeder circuit 2-8-1 can adopt the components and parts such as resistance, electric capacity, transistor jointly to complete, point piezoelectricityRoad 2-8-1 can realize by existing technology, and bleeder circuit 2-8-1 provides required high pressure, dividing potential drop for photomultiplierPenetrate with plate 2-8 and provide transmittability for pulse signal.
A kind of plastic scintillator detector, the radiation ray energy discharging by plastic scintillator detector measuring radiation sourceAmount, and obtain the contained ray energy size of radiation source according to its energy changing characteristics, finally by the parameter of measuring and demarcation ginsengNumber is made comparisons, thereby determines whether measuring process reaches standard.
Detailed description of the invention two: referring to Fig. 2 and Fig. 3, present embodiment is described, present embodiment and detailed description of the invention oneThe difference of described a kind of plastic scintillator detector is, described data processing equipment 4 comprise coincide counter 4-1,Add sum counter 4-2 and data processor 4-3;
Two data-signal inputs of coincide counter 4-1 are all by the number of aviation socket 2-3 and single-channel analyzer 2-8-3Connect according to signal output part, data-signal output and data processor 4-3 the first data-signal of coincide counter 4-1 are defeatedEnter end and connect,
Add two data-signal inputs of sum counter 4-2 all by the number of aviation socket 2-3 and single-channel analyzer 2-8-3Connect according to signal output part, the data-signal output and data processor 4-3 the second data-signal that add sum counter 4-2 are defeatedEntering end connects.
Present embodiment, the detailed process that described data processing equipment 4 is processed the signal receiving is: coincidence countingDevice 4-1, for receiving the data-signal of two aviation socket 2-3 outputs, mates two data-signals that receive,The data-signal that the match is successful is delivered to data processor 4-3,
Add sum counter 4-2, for receiving the data-signal of two aviation socket 2-3 outputs, two numbers that receive be it is believed thatNumber sum up, and by add and result deliver to data processor 4-3,
Data processor 4-3 is poor as minuend and the data that the match is successful adding with result of receiving, then this difference is tiedFruit, divided by 2, finally obtains result of detection.
Detailed description of the invention three: referring to Fig. 1 to Fig. 3, present embodiment is described, present embodiment and detailed description of the invention oneOr the difference of a kind of plastic scintillator detector described in two is, described barrel-type casing 1 is cast aluminium shell.
Detailed description of the invention four: referring to Fig. 1 to Fig. 3, present embodiment is described, present embodiment and detailed description of the invention oneOr the difference of a kind of plastic scintillator detector described in two is, the lateral wall of described 1 two ends of barrel-type casing is all establishedThere is annular groove 2-7.
Claims (4)
1. a plastic scintillator detector, it comprises barrel-type casing (1), two photodetection unit (2), Plastic scintillationBody (3) and data processing equipment (4);
Described photodetection unit (2) comprises case lid cover (2-1), aluminium seat (2-2), aviation socket (2-3), many bulletsSpring (2-4), multiple bolt (2-5), point injection are with plate (2-8) and photomultiplier (2-9);
Described aluminium seat (2-2), aviation socket (2-3), spring (2-4), bolt (2-5), point injection are with plate (2-8)With photomultiplier (2-9) is positioned at barrel-type casing (1),
Case lid cover (2-1) is fixedly connected with one end of barrel-type casing (1), and described case lid cover (2-1) center is provided withThrough hole,
The one tight case lid cover of side (2-1) of aluminium seat (2-2), aviation socket (2-3) is through the through hole of case lid cover (2-1)After, being fixedly connected with aluminium seat (2-2), the opposite side of aluminium seat (2-2) is fixed with multiple bolts (2-5), each bolt (2-5)On all cover have a spring (2-4), point injection is with being provided with multiple locating holes on plate (2-8), each locating hole and a spiral shell(2-5) is corresponding for bolt, and the end of bolt (2-5) inserts in corresponding locating hole, makes every spring (2-4)It is upper with plate (2-8) and aluminium seat (2-2) that two ends are pressed in respectively point injection, the base welding of described photomultiplier (2-9)Upper with plate (2-8) in point injection, one end close contact of the induction end of photomultiplier (2-9) and plastic scintillant (3),Divide injection to be connected with aviation socket (2-3) by wire (2-6) with the data-signal output of plate (2-8),
It is characterized in that,
Described two photodetection unit (2) are in the two ends radial symmetric of barrel-type casing (1), plastic scintillant (3) positionIn barrel-type casing (1),
Divide injection to comprise bleeder circuit (2-8-1), amplifier (2-8-2) and single-channel analyzer (2-8-3) with plate (2-8);The voltage signal output end of bleeder circuit (2-8-1) is connected with the base of photomultiplier (2-9), photomultiplier (2-9)Pulse signal output end be connected with the pulse signal input terminal of amplifier (2-8-2), the data of amplifier (2-8-2) letterNumber output is connected with the data-signal input of single-channel analyzer (2-8-3), the data letter of single-channel analyzer (2-8-3)Number output is connected with the signal input part of aviation socket (2-3), data-signal output and the number of aviation socket (2-3)Data-signal input according to treating apparatus (4) connects.
2. a kind of plastic scintillator detector according to claim 1, is characterized in that, described data processing equipment(4) comprise coincide counter (4-1), add sum counter (4-2) and data processor (4-3);
Two data-signal inputs of coincide counter (4-1) are all by aviation socket (2-3) and single-channel analyzer (2-8-3)Data-signal output connect, the data-signal output of coincide counter (4-1) and data processor (4-3) firstData-signal input connects,
Add two data-signal inputs of sum counter (4-2) all by aviation socket (2-3) and single-channel analyzer (2-8-3)Data-signal output connect, add data-signal output and the data processor (4-3) second of sum counter (4-2)Data-signal input connects.
3. a kind of plastic scintillator detector according to claim 1 and 2, is characterized in that, described barrel-type casing(1) be cast aluminium shell.
4. a kind of plastic scintillator detector according to claim 1 and 2, is characterized in that, described barrel-type casingThe lateral wall of (1) two end is equipped with annular groove (2-7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521136859.1U CN205246890U (en) | 2015-12-30 | 2015-12-30 | Plastic scintillator detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521136859.1U CN205246890U (en) | 2015-12-30 | 2015-12-30 | Plastic scintillator detector |
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| CN205246890U true CN205246890U (en) | 2016-05-18 |
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| CN201521136859.1U Expired - Fee Related CN205246890U (en) | 2015-12-30 | 2015-12-30 | Plastic scintillator detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085634A (en) * | 2018-08-14 | 2018-12-25 | 同济大学 | A kind of nuclear radiation detection device based on photonic crystal scintillator |
| CN115575999A (en) * | 2022-11-24 | 2023-01-06 | 中核第四研究设计工程有限公司 | Hospital radioactive wastewater on-line monitoring equipment |
| CN116859438A (en) * | 2023-06-29 | 2023-10-10 | 黑龙江省原子能研究院 | Instantaneous weak radiation signal detection device and method thereof |
-
2015
- 2015-12-30 CN CN201521136859.1U patent/CN205246890U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109085634A (en) * | 2018-08-14 | 2018-12-25 | 同济大学 | A kind of nuclear radiation detection device based on photonic crystal scintillator |
| CN115575999A (en) * | 2022-11-24 | 2023-01-06 | 中核第四研究设计工程有限公司 | Hospital radioactive wastewater on-line monitoring equipment |
| CN115575999B (en) * | 2022-11-24 | 2023-08-11 | 中核第四研究设计工程有限公司 | On-line monitoring equipment for radioactive wastewater in hospital |
| CN116859438A (en) * | 2023-06-29 | 2023-10-10 | 黑龙江省原子能研究院 | Instantaneous weak radiation signal detection device and method thereof |
| CN116859438B (en) * | 2023-06-29 | 2024-06-11 | 黑龙江省原子能研究院 | Instantaneous weak radiation signal detection device and method thereof |
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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: 20160518 Termination date: 20161230 |