CN106997058A - A kind of scintillator performance testing device and its Concordance method - Google Patents
A kind of scintillator performance testing device and its Concordance method Download PDFInfo
- Publication number
- CN106997058A CN106997058A CN201610044913.2A CN201610044913A CN106997058A CN 106997058 A CN106997058 A CN 106997058A CN 201610044913 A CN201610044913 A CN 201610044913A CN 106997058 A CN106997058 A CN 106997058A
- Authority
- CN
- China
- Prior art keywords
- scintillator
- light
- output
- data acquisition
- measuring unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/005—Details of radiation-measuring instruments calibration techniques
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention discloses a kind of scintillator performance testing device and its Concordance method.The present apparatus includes detector array, temperature compensation system, preamplifier, multi-channel data acquisition plate and the testing cassete for placing scintillator to be measured；Scintillator placement location wherein in testing cassete is corresponding with each light-detecting device in detector array；Preamplifier, shaping, difference output are amplified for export detector array per signal all the way；Multi-channel data acquisition plate is used to carry out analog-to-digital conversion to the multichannel differential analog signal of reception, afterwards to every real-time peak-seeking of railway digital signal and the every railway digital signal integration of completion；Finally the integration data of every road signal is transmitted to computer data acquisition system；And temperature-compensating correction, light output calibration of the output results and energy resolution correction are carried out by ad hoc approach to the power spectrum obtained by each photo detecting unit.The present apparatus can be while many scintillators of independent test and non-interference, improve measurement result precision.
Description
Technical field
The invention belongs to nuclear radiation detector technical field, it is related to a kind of scintillator performance testing device and its consistency school
Correction method.
Background technology
Particle or radiation in high-energy physics field can not be observed directly, only by being converted into matter interaction
Optical signal known to the mankind or electric signal could be by indirect detections.Nuclear radiation detector is exactly that high energy grain is detected using the principle
The device of son or nuclear radiation event, has been widely used in nuclear physics experiment, nuclear safety, nuclear medicine, geology detecting and work at present
The fields such as industry flaw detection.As one of most widely used nuclear radiation detector, scintillator detector is typically by scintillator, optical detection
Device and electronics composition；It is interacted with radiating particle using scintillator and produces the principle of fluorescence, and fluorescence is inputted
Opto-electronic conversion and signal amplification are carried out to light-detecting device, obtains radiating example finally by electric signal is carried out electronics processing
Information.Therefore when developing scintillator detector, the scintillator for measuring, filtering out light output function admirable is to ensure that scintillator is visited
Survey the first step of device service behaviour.At some application fields (such as nuclear medical imaging apparatus), often an equipment is needed on thousands of
Ten thousand scintillators, therefore the performance test of scintillator becomes a heavy task.
On the performance test of scintillator, technical scheme both domestic and external focuses primarily upon certain property for measuring certain scintillator
Can, the absolute light output of scintillator is for example measured with single photoelectron method；This kind of technical scheme measurement result is reliable, measuring method is smart
It is close, but measurement procedure is cumbersome, measuring apparatus is complicated；Not only use environment is limited, and measurement efficiency is low, it is difficult to
The measurement work of competent high-volume scintillator performance.A kind of scintillator is disclosed in national inventing patent CN102353976A
Energy measurement apparatus, is capable of the measurement that single completes a large amount of scintillator performances.But the light-detecting device involved by the patent can be by
The unstability of scintillator performance measurements is caused to the influence of some environmental factors (such as temperature, voltage)；While single
When measuring a large amount of scintillators, because the passage of scintillation light of a scintillator is detected by multiple photo detecting units, then by multiple light
The signal of probe unit sums up and obtains the signal amplitude corresponding to this scintillator light output, and has part full energy peak
Signal be gamma photons occur Compton scattering after, the sedimentary energy institute shape in two or more different scintillator
Into, so, the power spectrum corresponding to a scintillator is because by the inconsistency of photo detecting unit gain and in different sudden strains of a muscle
The influence of the Compton scattering occurred in bright body, the precision of full energy peak peak position will be restricted, generally, about ±
5%, ± 3% is also can only achieve under best conditions, further, since the gain inconsistency of each photo detecting unit and Compton
The influence of scattering, the full energy peak energy resolution for surveying scintillator power spectrum is also inaccurate, it is impossible to truly reflect this scintillator to certain
The energy resolution of individual energy gamma rays, so the device disclosed in patent CN102353976A does not have integrated energy resolution
Rate tests this functional module.
The content of the invention
The technical problem existed for the device disclosed in patent of invention CN102353976A, it is an object of the invention to carry
For a kind of stable scintillator performance testing device of performance and its Concordance method.This device for measuring performance of scintillator is used
Basic light-detecting device flexible design detector array, is independently read out, handles the defeated of discrete light-detecting device in detector array
Go out signal, in conjunction with the flexible Application of scintillator testing cassete, be capable of the scintillator of many plurality of specifications of independent test simultaneously, and not
Light cross talk effects, can provide the accurate light output measurement result of scintillator and energy resolution measurement result, test result
It is more accurate；The introducing of technique for temperature compensation makes this measurement apparatus service behaviour not influenceed by variation of ambient temperature, test knot
Fruit is more stablized；By carrying out Concordance to detector array, realize the measuring unit of each in detector array and exist
Uniformity in light output measurement result and energy resolution measurement result；Using low-voltage regulated power supply system, reduction power supply
Ripple, this measurement apparatus is not disturbed not only by civil power shakiness, while safe operation is simple, switching on and shutting down are convenient and swift, is carried significantly
Scintillator testing efficiency is risen.
Technical scheme：
This device for measuring performance of scintillator include mechanical casing, power-supply system, M*N detector arrays, preamplifier,
M*N channel datas analog input card, temperature monitoring system and scintillator testing cassete.Wherein：
Mechanical casing is used to load each part；
Power-supply system mainly includes two adjustable stabilized voltage supplies, is connected with each part, switch and is powered to each part；
M*N detector arrays are slapped together by M*N light-detecting device according to certain interval, for independent measurement simultaneously
M*N roots scintillator to be measured, obtains the energy information of each scintillator to be measured；
It is defeated that the M*N roads independent signal that M*N detector arrays are exported is carried out independently amplification shaping, difference by preamplifier
Go out to M*N channel data analog input cards；
The M*N roads differential analog signal of M*N channel data analog input card receiving front-ends electronic system output simultaneously carries out mould
Number conversion, afterwards to every real-time peak-seeking of railway digital signal and the every railway digital signal integration of completion.Finally by the product of every road signal
Divided data is transmitted to computer data acquisition system；Data collecting plate card completes the temperature acquisition function of detector and transmitted simultaneously
Temperature signal is to computer data acquisition system；
Temperature monitoring system is gone forward side by side trip temperature compensation correction for monitoring of environmental temperature change, and lifting measurement device is in shakiness
Determine the job stability in environment；
Scintillator testing cassete is used to load scintillator to be measured, with detector array intimate contact, makes flicker body position to be measured
It is fixed；
Light output result Concordance and energy resolution uniformity school are carried out to M*N measuring unit of measurement apparatus
Just, the uniformity between each measuring unit is realized.
Compared with prior art, beneficial effects of the present invention：
This measurement apparatus can independent test M*N root scintillators simultaneously, it is to avoid the optical crosstalk interference between tested scintillator is existing
As measurement result is more accurate；In scintillator independent measurement with being measured with other scintillators under two kinds of measuring states simultaneously, light is defeated
Go out measurement result difference and be better than ± 0.5 better than ± 1.0%, energy resolution measurement result stability, compared to patent of invention
Device disclosed in CN102353976A, which has, significantly to be improved；
A photo detecting unit only detects the light that a scintillator is sent in this measurement apparatus, what a scintillator was sent
Light is also only detected by a photo detecting unit；Therefore the test full energy peak peak position precision of tested scintillator is only tested flicker with this
Body and its photo detecting unit are relevant, are not disturbed by other photo detecting units；While test full energy peak peak position of the tested scintillator
By gamma ray, through Compton scattering, the sedimentary energy in other scintillators is not influenceed precision, because being tested scintillator pair with this
The photo detecting unit answered can only detect the passage of scintillation light sent by the tested scintillator；So this measurement apparatus is to the complete of scintillator
Energy peak peak position measuring accuracy is very high, better than ± 1.0%, has significantly compared to the device disclosed in patent of invention CN102353976A
Improvement.
This measurement apparatus is carried out continuously scintillator performance measurement for a long time in the environment of temperature change, and measurement result is stable
Property it is good, better than ± 2%；
M*N measuring unit uniformity is better than ± 1.0% in this measurement apparatus, therefore when using this measurement apparatus, only
Light output measurement demarcation need to be carried out to wherein some measuring unit can complete the measurement result demarcation to whole measurement apparatus；
This measurement apparatus is measured using independent photo detecting unit to independent scintillator, therefore can also be to being surveyed
The energy resolution of power spectrum full energy peak carries out effective measurement and calibration, and providing high-precision energy resolution for scintillator surveys
Examination, in order to be screened to scintillator in terms of light output and energy resolution two, compared to patent of invention
Device disclosed in CN102353976A is a function enhancing.
The interference of this measurement apparatus job stability Bu Shou cities electro-mechanical wave, while safe operation is simple, switching on and shutting down facilitate fast
Victory, greatly improves scintillator testing efficiency.
Brief description of the drawings
Fig. 1 is scintillator test structure figure (being used to prevent optical crosstalk)；
Fig. 2 is measurement apparatus detector array and electronic system layout plane structure chart；
Fig. 3 is preamplifier layout structure figure；
Fig. 4 is single channel sensing technique schematic diagram；
Fig. 5 is scintillator performance testing device structural representation；Wherein, 1 --- mechanical box body；2 --- power-supply system；
3 --- cooling system；4 --- preamplifier；5 --- detector array；6 --- M*N channel data collection plates；7——
Scintillator testing cassete；9 --- scintillator takes out box；
Fig. 6 is scintillator testing tool structural representation；
(a) scintillator testing cassete；(b) scintillator takes out box.
Embodiment
It is assumed that above-mentioned M=N=8, it is assumed that above-mentioned light-detecting device is silicon photomultiplier (SiPM), is filled the following is this measurement
Put the specific implementation form of development：
Mechanical casing 1 loads whole parts of device for measuring performance of scintillator, and plays lucifuge.
Two power modules of power-supply system 2 point.Power module one is ultralow ripple adjustable stabilized voltage supply, is detector array
Powered with preamplifier；Power module two is low-ripple switch power supply, is that data collecting plate card and temperature monitoring system are supplied
Electricity.The present invention reduces the system noise of measurement apparatus using low ripple power module, by the data collecting card that noise jamming is larger
Carry out independently-powered, it is intended to reduce the interference of measurement apparatus internal system.It is what detector array was powered after the completion of device debugging
Adjustable stabilized voltage supply is set to the non-adjustable state of user, therefore without re-scaling measurement apparatus because supply voltage changes.Electricity
High voltage power supply is not present in source system, it is ensured that need not be spent during the security of whole system, therefore measurement apparatus use
Many times are used to lift high pressure.
Detector array 5 scrabbles up 8*8 detector arrays by 64 silicon photomultipliers (SiPM) according to equidistant d.Battle array
Row detector surface pastes one layer of very thin high transmission rate material as optical protection layer.Scintillator to be measured is put into as shown in Figure 7
In testing cassete 7 with hole slot 8 lucifuge for a period of time after, (as shown in Figure 1) tips upside down on testing cassete on detector array 5, flicker
Light is detected by the optics light transmission piece of testing cassete bottom by SiPM, testing cassete hole slot center and detector array 5SiPM
Align one by one.Scintillator passes through Air Coupling (the refractive index n of light transmission piece with light transmission pieceLight transmission piece=1.46, the refractive index of air is
nAir=1.0), due to the refraction of light, passage of scintillation light enters after light transmission piece from air, refraction angle θ≤43.23 ° in light transmission piece.
Light is in thick h1Light transmission piece internal transmission when lateral divergence propagate length be d1=h1·tan(θ).Light transmission piece is testing cassete
A part, for loading scintillator and optical transport；Therefore from the point of view of mechanical strength, light transmission piece should not be too thin, and thickness is needed
Meet h1≥1mm。
SiPM2 is scintillator B2 test cell in Fig. 1, under unglazed crosstalk condition, between scintillator B2 and SiPM2
Light output is man-to-man with optical detection.Therefore the spacing d between SiPM is met：d≥d1=h1During tan (θ) >=0.9mm,
SiPM2 will not detect the light that scintillator B1 and B3 are sent.
Optical protection layer mainly plays protection detector array and printing opacity, therefore the thickness h of diaphragm2Can be as far as possible thin
So that light can be ignored through the diverging during diaphragm.
By said structure design, optical crosstalk is eliminated during optical transport with detection：The light that scintillator B2 is sent
Only detected by SiPM2, SiPM2 can only also detect the light that scintillator B2 is sent.
At the same time, not only scintillator and SiPM optical transport detection are one-to-one, and each SiPM of detector array is surveyed
Measure unit and use single channel sensing technique (as shown in Figure 4), letter is avoided in the electronics processing of test signal and acquisition process
Number interference.
In the figure 7, the hole slot size of scintillator testing cassete 7 is consistent with tested scintillator size, is mainly used in every light and prevents
Only optical crosstalk, the size of regulation hole slot can meet the scintillator test of different size；And scintillator takes out the hole slot section of box
Size is consistent with scintillator, and depth is less than the height of tested scintillator.After scintillator is completed, by testing cassete 7 with taking out
Box 9, which is combined, to be spun upside down, and can easily take out tested scintillator on the premise of test No. order is kept.
After the completion of measurement apparatus debugging, detector array supply voltage will be set to the unadjustable state of user, therefore
Measurement apparatus demarcation state of dispatching from the factory can be kept for a long time, be not required to frequently demarcate measurement result.
Measurement apparatus detector array and electronic system are laid out plane structure chart as shown in Fig. 2 wherein, port 1 is used for
Signal transmission and position between detector array and pinboard are fixed；Port 2 is used between pinboard and signal-processing board
Signal transmission fixed with position；The signal transmission that port 3 is used between signal-processing board and data acquisition board, passes through signal wire
Connection；The center of port 2 on pinboard is with the center of port 3 in data acquisition board in space layout
Align one by one, it is this layout " 4 × 16 " road output signals turn " 1 × 64 " roads receive signal process in play space transitional function；
As shown in figure 3, four block signal process plates are respectively inserted at the port 2 of four diverse locations of pinboard, it will make to be located at four pieces
The port 3 of signal-processing board is spatially alignd one by one with four ports 3 positioned at data acquisition board, so as to avoid due to letter
The excessive distortion of signal wire number between process plate and data acquisition board and the signal interference brought.
Fig. 3 is preamplifier layout structure figure；Wherein, four block signal pinboard parallel alignments are inserted, and are visited with array
The mode signal output of device 4 × 16 is surveyed to correspond；Four block signal process plates are respectively inserted in the different port position of four pieces of pinboards
Place, it is parallel to be staggeredly laid out；The signal output port of signal-processing board by with the four of data acquisition board signal input ports in sky
Between align one by one in relative position.
As shown in Fig. 2 independent amplification shaping energy signal of 64 tunnels from detector array of preamplifier 4 and difference
Output is to data acquisition board 6, it is to avoid interfered with each other in signal processing.64 passage preamplifiers are by four 16 passages
Signal-processing board is constituted；The road energy signal of 8 × 8 detector array 64 is read in 4 × 16 modes, and 64 channel data collection plates with
1 × 64 mode difference reads in signal；Distorted for the overflexing that avoids signal wire and bring interference to signals transmission, by array
Detector is connected with preamplifier by four block signal pinboards, and topology layout is as shown in Figures 2 and 3.Pinboard
Introducing, realize between signal transmission port space linking, while so that preamplifier 4 staggeredly be laid out, be convenient for
Electronic system radiates.
64 channel data collection plates 6 receive the 64 road differential signals that preamplifier 4 exports and are digitized, and by number
Word signal is transmitted to computer data acquisition system；Receive simultaneously and transmit temperature information to computer data acquisition system.Most
Metrical information is arranged by computer data acquisition system eventually, analyzed, measurement form is generated.
Temperature-compensating correction, power spectrum Concordance, peak-seeking are carried out to measurement apparatus in computer data acquisition system
Fitting, light output measurement result are demarcated and carry out Concordance to energy resolution result.
Temperature monitoring system 3 is made up of cooling system, temperature sensor and temperature compensation algorithm.Temperature monitoring system works
Principle is as follows：Measurement apparatus electronic system is dissipated by cooling system (being made up of air inlet, air outlet, radiator fan)
Heat；By temperature sensor monitors detector array real-time working temperature and temperature information is sent to data acquisition board, finally
Received by computer data acquisition system；Observation metrical information variation with temperature relation simultaneously does following temperature to measurement result accordingly
Spend compensation correction：ECorrect=EMeasure(1+fTΔ T) (wherein, ECorrect--- the later metrical information of correction；
EMeasure--- the metrical information before correction；fT--- metrical information varies with temperature coefficient；Δ T --- temperature change).Examine
Consider in detector array 64 SiPM otherness and single channel sensing technique, the temperature varying coefficient of each measuring unit is simultaneously
Differ, therefore temperature-compensating correction is carried out respectively to 64 measuring units.After temperature-compensating is corrected, measurement apparatus is to flicker
The measurement result of body is not influenceed by variation of ambient temperature and device internal electron system heat generation.
The light output measurement that Light Difference between each measuring unit will cause same scintillator to be obtained in each measuring unit
As a result there is certain difference.On the basis of temperature-compensating correction is completed, light output measurement result one is carried out to measurement apparatus
The correction of cause property.It is as follows in trimming process：In dark situation, with reference to radioactive source, using detector array, each measuring unit is (each
Measuring unit includes a silicon photomultiplier and the silicon photomultiplier is gathered in the preamplifier that signal is handled
With the signal processing circuit in multi-channel data acquisition plate) same scintillator of measurement, record the measurement of each measuring unit
Peak position Pmeasure-i, measure peak position average valueObtained by formula (1)：
Concordance coefficient AiObtained by formula (2)：
The measurement power spectrum to this measurement apparatus corrected as shown in formula (3) accordingly：
EPOutPut-i=EPmeasure-i·Ai............................(3)
Wherein, EPmeasure-i--- the gamma-spectrometric data before Concordance, EPOutPut-i--- the power spectrum after Concordance
Data.Concordance as shown in formula (3) is carried out to each track data in each measuring unit power spectrum, peak is not only met
Uniformity (the P of position measurement resultOutPut-i=Pmeasure-i·Ai), while keeping energy resolution measurement result unaffected.
After this corrects, same scintillator, peak position measurement result P are measured using any cellOutPut-iUnanimously, and
Light output measurement result (PhOutPut-i=gPOutPut-i) same consistent.
The energy resolution ER of scintillator detector by detector self-energy resolution ratio DERWith the intrinsic energy of scintillator
Measure resolution ratio SERTwo parts are constituted, i.e.,Therefore, energy resolution measurement of the scintillator in the present apparatus
As a result by the self-energy resolution ratio U of measuring unitERWith the self-energy resolution ratio S of scintillatorERTwo parts are constituted, i.e.,64 SiPM difference and 64 differences for being independently read out passage is caused in detector array
Otherness of 64 measuring units in self-energy resolution ratio in measurement apparatus, therefore same scintillator will be caused in this dress
The energy resolution measurement result put at diverse location is inconsistent.For the problem, the present apparatus has carried out 64 measuring unit sheets
The Concordance of energy resolution is levied, energy resolution measurement result institute band of the difference to scintillator of measuring unit is eliminated
The influence come.Bearing calibration is as follows：
Under radiation source, same scintillator is tested respectively with 64 measuring units, corresponding energy resolution is recorded
Rate measured value ERmeasure-i(i=1,2 ..., 64), and ERmeasure-iMeet relational expression (4) and set up while deriving relational expression (5).
So the self-energy differences in resolution available relationship formula (6) of 64 measuring units of this measurement apparatus is represented：
Tied to eliminate energy resolution measurement of the self-energy differences in resolution of each measuring unit to same scintillator
The influence that fruit is brought, to energy resolution measurement output result correct as shown in relational expression (7)：
After peak position Concordance and energy resolution result Concordance, detector array any cell is used
Same scintillator is measured, peak position measurement result, light output measurement result and energy resolution measurement result are consistent.
Concordance is not carried out to measurement apparatus in known method, it is therefore desirable to each position of measurement apparatus
Light output is demarcated, and the calibration coefficient of each position is inconsistent.And this measurement apparatus completes temperature-compensating correction, uniformity
On the basis of correction, only a certain measuring unit of detector array, which need to be demarcated, can just complete to whole measurement apparatus
Demarcation.Calibration process is as follows：Under the irradiation in certain power radiation source, the scintillator (standard scintillation body) of known light output is passed through
Test fixture is placed on detector array and measured, and obtains the all-round peak position road location P0 of the radioactive source；Tentative standard scintillator
Light output be 6000ph/MeV, under identical radiation source, the corresponding light outputs of measurement peak position road location Px are
In summary, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
It is all within spirit of the invention and principle, do any modification, equivalent substitution and improvements etc. and should be included in the scope of the present invention
Within.
Claims (10)
1. a kind of scintillator performance testing device, it is characterised in that including M*N detector arrays, temperature monitoring system, preceding storing
Big system, multi-channel data acquisition plate and the testing cassete for placing scintillator to be measured；Wherein：
M*N detector arrays include M*N light-detecting devices；
Scintillator placement location in testing cassete is corresponded with the light-detecting device in M*N detector arrays, for simultaneously only
The vertical most M*N roots scintillators to be measured of measurement；
Preamplifier, shaping, difference output are amplified at most for export M*N detector arrays per signal all the way
Channel data collection plate；
Multi-channel data acquisition plate, it is real to every railway digital signal afterwards for carrying out analog-to-digital conversion to the differential signal received
When peak-seeking and complete per railway digital signal integration；Finally the integration data of every road signal is transmitted to computer data acquiring system
System.
2. scintillator performance testing device as claimed in claim 1, it is characterised in that the table of the M*N detector arrays
Face pastes the optical protection layer of one layer of printing opacity, and a light transmission piece is provided between the optical protection layer and the testing cassete, and light transmission piece is
High transmission rate material is used to load scintillator and carries out optical transport；Spacing d between light-detecting device is metθ is the refraction angle that light is entered after light transmission piece by air, nAirRolled over for air
Penetrate rate, nLight transmission pieceFor light transmission piece refractive index, h1 is the thickness of light transmission piece.
3. scintillator performance testing device as claimed in claim 1, it is characterised in that the light-detecting device includes single channel
Photomultiplier, optical diode, avalanche-type optical diode, silicon photomultiplier etc..
4. scintillator performance testing device as claimed in claim 1 or 2, it is characterised in that if the preamplifier includes
Dry multi-passage signal processing plate；The M*N detector arrays replace signal wire and a multi channel signals by a pinboard respectively
Process plate is connected, and each multi-passage signal processing plate is connected with data acquisition board by signal wire respectively.
5. scintillator performance testing device as claimed in claim 1 or 2, it is characterised in that parallel alignment between each pinboard,
The output port being interspersed simultaneously on pinboard is so that the parallel staggeredly layout of multi-passage signal processing plate, parallel to interlock what is be laid out
Output port on multi-passage signal processing plate aligns one by one with the input port in data acquisition board.
6. scintillator performance testing device as claimed in claim 1, it is characterised in that including a temperature monitoring system, be used for
Monitoring M*N detector arrays in each light-detecting device real-time working temperature and temperature information is sent to through data acquisition board
The computer data acquisition system, and formula E is pressed respectively to each light-detecting device in M*N detector arraysCorrect=
EMeasure(1+fTΔ T) carry out temperature-compensating correction；Wherein, ECorrectTo correct later metrical information；EMeasureFor correction
Metrical information in the past；fTCoefficient is varied with temperature for metrical information；Δ T is temperature change value.
7. scintillator performance testing device as claimed in claim 5, it is characterised in that the electricity of the scintillator performance testing device
Source system includes power module one and power module two；Wherein, power module one is ultralow ripple adjustable stabilized voltage supply, is M*N
Detector array and preamplifier are powered；Power module two be low-ripple switch power supply, be multi-channel data acquisition plate and
Temperature monitoring system is powered.
8. scintillator performance testing device as claimed in claim 1 or 2, it is characterised in that provided with M*N in the testing cassete
Hole slot for inserting scintillator to be measured, the center of hole slot is corresponding with each light-detecting device in M*N detector arrays；Also
Box is taken out including a scintillator matched with the testing cassete；The scintillator, which takes out, is provided with multiple hole slots, the section chi of hole slot in box
Very little consistent with scintillator to be measured, depth is less than the height of scintillator to be measured.
9. a kind of energy resolution bearing calibration based on scintillator performance testing device described in claim 1, its step is：
1) in dark situation, same scintillator is measured using each measuring unit with reference to radioactive source, corresponding energy point is recorded
Distinguish measured value ERmeasure-i；Wherein, each measuring unit is visited including a light-detecting device in M*N detector arrays and with the light
Survey the signal processing circuit of device connection；
2) according to the energy resolution measured value ER of each measuring unitmeasure-iCalculate and obtain the flat of an energy resolution measured value square
Average is met
3) when measuring same scintillator using any measuring unit i, output result is measured energy resolution according to formulaIt is corrected, output energy resolution measurement result EROutPut-i；
Wherein, UER-iIt is single for measurement
First i energy resolution influence value, SERDifferentiated for the self-energy of the scintillator；For each measuring unit energy resolution influence value
UER-iSquare average value.
10. a kind of light output calibration of the output results method based on scintillator performance testing device described in claim 1, its step is：
1) in dark situation, same scintillator is measured using each measuring unit with reference to radioactive source, corresponding full energy peak is recorded
Position measurement result Pmeasure-i；Wherein, each measuring unit include M*N detector arrays in a light-detecting device and with the light
The signal processing circuit of sensitive detection parts connection；
2) according to the full energy peak measured value P of each measuring unitmeasure-iCalculating obtains full energy peak measurement average value Wherein, K=M*N；
3) when measuring same scintillator using any measuring unit i, every one of measurement data root all can be composed to measuring unit i
According to formula EPOutPut-i=EPmeasure-i·AiIt is corrected, then full energy peak measurement result is POutPut-i=Pmeasure-i·Ai, most
Light output measurement result is obtained eventually for PhOutPut-i=gPOutPut-i；Wherein,G is light output correction coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610044913.2A CN106997058B (en) | 2016-01-22 | 2016-01-22 | A kind of scintillator performance testing device and its Concordance method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610044913.2A CN106997058B (en) | 2016-01-22 | 2016-01-22 | A kind of scintillator performance testing device and its Concordance method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106997058A true CN106997058A (en) | 2017-08-01 |
| CN106997058B CN106997058B (en) | 2019-05-03 |
Family
ID=59428590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610044913.2A Active CN106997058B (en) | 2016-01-22 | 2016-01-22 | A kind of scintillator performance testing device and its Concordance method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106997058B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643538A (en) * | 2017-10-18 | 2018-01-30 | 中国检验检疫科学研究院 | A kind of device for being used to verify scintillator detector performance |
| CN107861147A (en) * | 2017-12-26 | 2018-03-30 | 同方威视技术股份有限公司 | Scintillator sensitivity measuring apparatus and measuring method |
| CN109298133A (en) * | 2018-07-18 | 2019-02-01 | 重庆邮电大学 | Detector module based on edge gateway correction produces yields improved method |
| CN109490940A (en) * | 2018-12-14 | 2019-03-19 | 江苏赛诺格兰医疗科技有限公司 | A kind of scintillator arrays luminescence decay time test method and device |
| CN109507714A (en) * | 2018-12-27 | 2019-03-22 | 江苏赛诺格兰医疗科技有限公司 | A kind of detector gain state quick judgment method |
| CN110794468A (en) * | 2019-12-09 | 2020-02-14 | 北京中科核安科技有限公司 | SiPM-based surface pollution detector |
| WO2020103488A1 (en) * | 2018-11-19 | 2020-05-28 | 苏州瑞派宁科技有限公司 | Scintillation crystal testing device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004354271A (en) * | 2003-05-30 | 2004-12-16 | Tohken Co Ltd | Radiation detector |
| US7329874B2 (en) * | 2003-09-24 | 2008-02-12 | Radiation Monitoring Devices, Inc. | Lu1-xI3:Cex-a scintillator for gamma-ray spectroscopy and time-of-flight pet |
| CN102353976A (en) * | 2011-07-13 | 2012-02-15 | 中国科学院高能物理研究所 | Device for measuring performance of scintillator |
| CN204556841U (en) * | 2015-05-14 | 2015-08-12 | 中国电子科技集团公司第二十六研究所 | A kind of batch testing fixture of scintillator crystal bar |
-
2016
- 2016-01-22 CN CN201610044913.2A patent/CN106997058B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004354271A (en) * | 2003-05-30 | 2004-12-16 | Tohken Co Ltd | Radiation detector |
| US7329874B2 (en) * | 2003-09-24 | 2008-02-12 | Radiation Monitoring Devices, Inc. | Lu1-xI3:Cex-a scintillator for gamma-ray spectroscopy and time-of-flight pet |
| CN102353976A (en) * | 2011-07-13 | 2012-02-15 | 中国科学院高能物理研究所 | Device for measuring performance of scintillator |
| CN204556841U (en) * | 2015-05-14 | 2015-08-12 | 中国电子科技集团公司第二十六研究所 | A kind of batch testing fixture of scintillator crystal bar |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107643538A (en) * | 2017-10-18 | 2018-01-30 | 中国检验检疫科学研究院 | A kind of device for being used to verify scintillator detector performance |
| CN107861147A (en) * | 2017-12-26 | 2018-03-30 | 同方威视技术股份有限公司 | Scintillator sensitivity measuring apparatus and measuring method |
| CN109298133A (en) * | 2018-07-18 | 2019-02-01 | 重庆邮电大学 | Detector module based on edge gateway correction produces yields improved method |
| CN109298133B (en) * | 2018-07-18 | 2021-07-13 | 重庆邮电大学 | Detector module production yield improvement method based on edge channel correction |
| WO2020103488A1 (en) * | 2018-11-19 | 2020-05-28 | 苏州瑞派宁科技有限公司 | Scintillation crystal testing device |
| CN109490940A (en) * | 2018-12-14 | 2019-03-19 | 江苏赛诺格兰医疗科技有限公司 | A kind of scintillator arrays luminescence decay time test method and device |
| CN109507714A (en) * | 2018-12-27 | 2019-03-22 | 江苏赛诺格兰医疗科技有限公司 | A kind of detector gain state quick judgment method |
| CN109507714B (en) * | 2018-12-27 | 2020-06-05 | 江苏赛诺格兰医疗科技有限公司 | Method for rapidly judging gain state of detector |
| CN110794468A (en) * | 2019-12-09 | 2020-02-14 | 北京中科核安科技有限公司 | SiPM-based surface pollution detector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106997058B (en) | 2019-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106997058B (en) | A kind of scintillator performance testing device and its Concordance method | |
| CN103605148B (en) | A kind of gamma spectrometry method under high count rate | |
| CN102353976A (en) | Device for measuring performance of scintillator | |
| CN112014873B (en) | Method for rapidly determining action depth positioning resolution of double-end reading detector | |
| CN103245680A (en) | Fast neutron imaging method and system based on time-of-flight method | |
| Chichester et al. | Comparison of BCF-10, BCF-12, and BCF-20 scintillating fibers for use in a 1-dimensional linear sensor | |
| CN108398710A (en) | A kind of device measured in real time for neutron energy spectrum in reactor | |
| US10139498B2 (en) | Radiation measurement apparatus and method | |
| Kaviani et al. | Design and development of a dedicated portable gamma camera system for intra-operative imaging | |
| CN102841366B (en) | Method and system for detecting discrimination threshold of pulse-amplitude discriminator | |
| CN107884813A (en) | A kind of calibrating installation for thermoluminescent dosimeter | |
| CN109490940B (en) | Method for testing light-emitting decay time of scintillator array | |
| CN103424764A (en) | Measuring device for dose distribution of ray radiation field | |
| CN107290773A (en) | A kind of device and method of spectral measurement | |
| CN111965692A (en) | Performance test system of scintillator and calibration method thereof | |
| Kistler et al. | Simulated performances of a very high energy tomograph for non-destructive characterization of large objects | |
| CN105628715A (en) | Potassium measuring instrument of sodium iodide crystals of raw material potassium ores | |
| CN217305555U (en) | Large radiation field gamma energy spectrum on-line measuring device | |
| CN212808638U (en) | Performance test system of scintillator | |
| JP4759755B2 (en) | Device for measuring solid uranium in equipment | |
| CN203630363U (en) | Measuring device for dose distribution of ray radiation field | |
| KR102328147B1 (en) | Side readout radiation probe | |
| CN201075090Y (en) | Instrument for detecting talc powder concentration | |
| US20240151861A1 (en) | Scintigraphic detection device with a high degree of compactness and simplified electronics | |
| CN1399128A (en) | Pulse neutron analyzer for coal industry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |