CN106501836A - A kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier - Google Patents
A kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier Download PDFInfo
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- CN106501836A CN106501836A CN201610842744.7A CN201610842744A CN106501836A CN 106501836 A CN106501836 A CN 106501836A CN 201610842744 A CN201610842744 A CN 201610842744A CN 106501836 A CN106501836 A CN 106501836A
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- China
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- preamplifier
- dose rate
- rate instrument
- dome
- tellurium
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/02—Dosimeters
- G01T1/026—Semiconductor dose-rate meters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention belongs to Radiation monitoring technical field, disclose a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier.The dose rate instrument includes detector system, signal processing system and control circuit system；The detector system includes two dome-type CZT crystal, preamplifier and circuit boards；The control circuit system includes high-voltage power module, low-tension supply module, portable module power supply and battery management chip；The signal processing system includes two-channel digital multiple tracks, signal processing software, liquid crystal touch screen and computer.The dose rate instrument has the high beneficial effect of energy resolution height, detection efficient.
Description
Technical field
The invention belongs to Radiation monitoring technical field, and in particular to a kind of based on double hemisphere tellurium-zinc-cadmium detectors and double preposition
The dose rate instrument of amplifier.
Background technology
Cadmium-zinc-teiluride (hereinafter referred to as CZT) crystal is used for the maturation of the Technical comparing in terms of Radiation monitoring both at home and abroad, at present
Through disclosing plane, mixing handheld, Frisch's grid-type and dome-type tellurium-zinc-cadmium detector etc., wherein dome-type CZT is visited
Survey device shape and be generally cuboid, electric field is class dome-type, and therefore those skilled in the art are commonly referred to as dome-type CZT spies
Survey device.Wang Ying etc. is disclosed for 2014《Multi-functional dose rate instrument applied research based on dome-type tellurium-zinc-cadmium detector》This
Document, and elaborate to detect based on dome-type CZT in terms of energy range, energy resolution, environmental suitability and angular response etc.
Applicability of the device as multi-functional dose rate instrument, the document are to be merged into one using two dome-type CZT detector common-anodes
Class ball-type CZT detector, but detector disclosed in the document yet suffers from the relatively low problem of detection efficient and energy resolution.
Content of the invention
(1) goal of the invention
According to the problems of prior art, the invention provides the agent that a kind of energy resolution is high, detection efficient is high
Dose rate instrument.
(2) technical scheme
In order to solve the problems of prior art, the technical scheme that the present invention is provided is as follows：
A kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier, the dose rate instrument includes detecting
Device system, signal processing system and control circuit system；
The detector system includes two dome-type CZT crystal, preamplifier and circuit boards, two dome-type CZT
The shape of crystal, structure are identical with size, are cuboid；The one of each dome-type CZT crystalline areas maximum
Individual face connects positive high voltage, is anode, and other 5 face ground connection are negative electrode；Two crystal are by the way of left and right is put installed in circuit
On plate, below circuit board, at each CZT crystal corresponding, a preamplifier is both provided with, X, gamma-rays are produced on CZT crystal
Raw signal transmission is to preamplifier；The maximum cathode plane of two crystalline areas is left and right adjacent surface, and two phases
Proximal surface is brought into close contact；Two crystal, circuit board and the preamplifiers are located in a cylindrical housing, the center of two crystal
Position is in the radial centre lines of cylinder and anode surface is against barrel, and the probe body has carried out encapsulation process；
The control circuit system includes high-voltage power module, low-tension supply module, portable module power supply and cell tube
Reason chip, wherein high-voltage power module, low-tension supply module is connected with preamplifier by circuit respectively, and circuit and cylinder
Connected by aerial plug-in unit with encapsulation process between shape shell；High-voltage power module provides high pressure for two dome-type CZT crystal,
Low-tension supply module provides the operating voltage of ± 12V for preamplifier；
The signal processing system includes two-channel digital multiple tracks, signal processing software, liquid crystal touch screen and computer, from
Preamplifier two paths of signals line out respectively enters digital multiple tracks, and two railway digital multiple tracks are processed to measuring power spectrum respectively
After be added, the measurement power spectrum after addition can be shown on the liquid crystal touch screen of the system or computer by software.At the signal
Reason system can provide complete digital pole-zero cancellation, digital filtering shaping, peak value judgement and extraction, power spectrum systematic function.
Preferably, the preamplifier is low noise charge sensitive preamplifier.
Preferably, the size of the dome-type CZT crystal is 10mm × 10mm × 5mm.
Preferably, the cylindrical housing is aluminum hull, and wherein aluminum hull thickness is 1mm, and the center position of two crystal is in
The center of cylinder and anode surface is against barrel.
Preferably, the portable module power supply is lithium battery group, uses when going out to carry, battery management chip control electricity
Pond electricity service condition.
Preferably, the periphery of described two dome-type CZT crystal is wrapped in the epoxy resin parcel of one layer of black.
Preferably, the high-voltage power module is 0～1500V for the high pressure that preamplifier is provided.
(3) beneficial effect
The dose rate instrument that the present invention is provided, the detector include two dome-type CZT crystal, dual preamplifier and bilaterals
Road numeral multiple tracks, adopts common-anode combination from existing two dome-types CZT crystal and electric field is different for class ball-type, and the present invention is adopted
Placed with the mode that cathode plane is adjacent surface i.e. " common cathode ", the electric field non-sphere of combination, from the signal of two-way CZT crystal output
Two-way preamplifier is respectively connected to, then respectively enters addition after digital multiple tracks is processed.Using such CZT crystal combinations
Mode and signal processing mode can be improved to X/ gamma-ray detections efficiency and energy resolution.Test is proved to Am-241
(59.5keV) detection efficient improves about 13 times, improves about 40% to the energy resolution of different radioactive sources, concrete such as table
Shown in 1.
The energy resolution of 1 different-energy ray of table
| Energy resolution under the conditions of common-anode | Energy resolution under the conditions of common cathode | |
| Am-241 | 10.3% | 7.57% |
| Cs-137 | 4.18% | 2.96% |
| Co-60 | 3.55% | 2.71% |
Description of the drawings
Fig. 1 is two dome-type CZT crystal disposing way schematic diagrames in the dose rate instrument that the application is provided；Wherein 1 is half
The anode surface of ball-type CZT crystal, 2 is dome-type CZT crystal；
Fig. 2 is that energy range is with MCNP method simulated range dose rate instrument 10cm under the conditions of common-anode and common cathode
The single of 10keV-2MeV can point source detection efficient analog result schematic diagram；
Specific embodiment
Below in conjunction with specification drawings and specific embodiments, the present invention is further elaborated.
Embodiment
A kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier, the dose rate instrument includes detecting
Device system, signal processing system and control circuit system；
The detector system includes two dome-type CZT crystal 2, preamplifier and circuit board, two dome-type CZT
The shape of crystal, structure are identical with size, are the cuboid of 10mm × 10mm × 5mm；Each dome-type CZT
A maximum face of crystalline areas connects positive high voltage for anode, and other 5 face ground connection are negative electrode；Two crystal are put using left and right
Mode is installed on circuit boards, is both provided with a preamplifier, X, gamma-rays below circuit board at each CZT crystal corresponding
The signal transmission produced on CZT crystal is to preamplifier；The maximum cathode plane of two crystalline areas is that left and right is adjacent
Face, and two adjacent surfaces are brought into close contact；Two crystal, circuit board and the preamplifiers are located in a cylindrical shape aluminum hull,
Wherein aluminum hull thickness is 1mm, and the center position of two crystal is in the radial centre lines of cylinder and anode surface is against barrel.Institute
Preamplifier is stated for low noise charge sensitive preamplifier.The cylindrical housing is aluminum hull,
The control circuit system includes high-voltage power module, low-tension supply module, portable module power supply and cell tube
Reason chip, wherein high-voltage power module, low-tension supply module is connected with preamplifier by circuit respectively, and the circuit and circle
Encapsulation process between cylindrical outer casing；High-voltage power module provides 0～1500V high pressure, low-tension supply for two dome-type CZT crystal
Module provides the operating voltage of ± 12V for preamplifier；
The signal processing system includes two-channel digital multiple tracks, signal processing software, liquid crystal touch screen and computer, from
Preamplifier two paths of signals line out respectively enters digital multiple tracks, and two railway digital multiple tracks are processed to measuring power spectrum respectively
After be added, the measurement power spectrum after addition can be shown on the liquid crystal touch screen of the system or computer by software.At the signal
Reason system can provide complete digital pole-zero cancellation, digital filtering shaping, peak value judgement and extraction, power spectrum systematic function.
The portable module power supply is lithium battery group, uses when going out to carry, and battery management chip controls battery electric quantity
Service condition.
The periphery of described two dome-type CZT crystal is wrapped in the epoxy resin parcel of one layer of black.
Single energy point source of the energy range for 10keV-2MeV is located above detector, range finder center 10cm.?
MCNP emulation is carried out to the detector geometry of " common cathode " and " common-anode " respectively in the case that other conditions are consistent, is obtained
Peak detection efficient in source is as shown in Figure 2.As can be seen from Figure 2, double dome-type CZT crystal " common cathodes " relative to " common-anode " in low energy
Amount its detection efficient of area is significantly improved.
Claims (7)
1. a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier, it is characterised in that the close rate
Instrument includes detector system, signal processing system and control circuit system；
The detector system includes two dome-type CZT crystal, preamplifier and circuit boards, two dome-type CZT crystal
Shape, structure identical with size, be cuboid；A maximum face of each dome-type CZT crystalline areas
Positive high voltage is connect, is anode, other 5 face ground connection are negative electrode；Two crystal are installed on circuit boards by the way of left and right is put,
A preamplifier is both provided with each CZT crystal corresponding below circuit board, X, gamma-rays are produced on dome-type CZT crystal
Raw signal transmission is to preamplifier；The maximum cathode plane of two crystalline areas is left and right adjacent surface, and two phases
Proximal surface is brought into close contact；Two crystal, circuit board and the preamplifiers are located in a cylindrical housing, the center of two crystal
Position is in the radial centre lines of cylinder and anode surface is against barrel；
The control circuit system includes high-voltage power module, low-tension supply module, portable module power supply and battery management core
Piece, wherein high-voltage power module, low-tension supply module are connected with preamplifier by circuit respectively, and outside circuit and cylindrical shape
Encapsulation process between shell；High-voltage power module provides high pressure for two dome-type CZT crystal, and low-tension supply module is preposition amplification
The operating voltage of device offer ± 12V；
The signal processing system includes two-channel digital multiple tracks, signal processing software, liquid crystal touch screen and computer, from preposition
Amplifier two paths of signals line out respectively enters digital multiple tracks, and two railway digital multiple tracks are respectively to measuring phase after power spectrum is processed
Plus, the measurement power spectrum after addition can be shown on the liquid crystal touch screen of the system or computer by software.
2. according to claim 1 a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier,
Characterized in that, the preamplifier is low noise charge sensitive preamplifier.
3. according to claim 1 a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier,
Characterized in that, the size of the dome-type CZT crystal is 10mm × 10mm × 5mm.
4. according to claim 1 a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier,
Characterized in that, the cylindrical housing is aluminum hull, wherein aluminum hull thickness is 1mm.
5. according to claim 1 a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier,
Characterized in that, the portable module power supply is lithium battery group.
6. according to claim 1 a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier,
Characterized in that, the periphery of described two dome-type CZT crystal is wrapped in the epoxy resin parcel of one layer of black.
7. according to claim 1 a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier,
Characterized in that, the high-voltage power module is 0～1500V for the high pressure that preamplifier is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610842744.7A CN106501836B (en) | 2016-09-22 | 2016-09-22 | Dose rate meter based on double hemispheres tellurium-zinc-cadmium detector and double preamplifiers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610842744.7A CN106501836B (en) | 2016-09-22 | 2016-09-22 | Dose rate meter based on double hemispheres tellurium-zinc-cadmium detector and double preamplifiers |
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| Publication Number | Publication Date |
|---|---|
| CN106501836A true CN106501836A (en) | 2017-03-15 |
| CN106501836B CN106501836B (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610842744.7A Active CN106501836B (en) | 2016-09-22 | 2016-09-22 | Dose rate meter based on double hemispheres tellurium-zinc-cadmium detector and double preamplifiers |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108279431A (en) * | 2018-05-02 | 2018-07-13 | 西安艾克斯光电科技有限公司 | A kind of portable radiant dosemeter and dosage monitoring equipment, segment processing method |
| CN108287357A (en) * | 2018-01-15 | 2018-07-17 | 东华理工大学 | A kind of source peak detection efficient acquisition methods of cylinder bulk detector to point source |
| CN109932742A (en) * | 2019-03-15 | 2019-06-25 | 苏州笃瑞监测科技有限公司 | A kind of portable radiant health-monitoring installation based on Spectrum acquisition |
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| WO2011139961A1 (en) * | 2010-05-03 | 2011-11-10 | Brookhaven Science Associates | Array of virtual frisch-grid detectors with common cathode and reduced length of shielding electrodes |
| CN103913763A (en) * | 2013-01-07 | 2014-07-09 | 同方威视技术股份有限公司 | Radiation detector and radiation detection device |
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| US20140217297A1 (en) * | 2010-05-03 | 2014-08-07 | Brookhaven Science Associates, Llc | Array of Virtual Frisch-Grid Detectors with Common Cathode and Reduced Length of Shielding Electrodes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108287357A (en) * | 2018-01-15 | 2018-07-17 | 东华理工大学 | A kind of source peak detection efficient acquisition methods of cylinder bulk detector to point source |
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| CN109932742A (en) * | 2019-03-15 | 2019-06-25 | 苏州笃瑞监测科技有限公司 | A kind of portable radiant health-monitoring installation based on Spectrum acquisition |
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| CN106501836B (en) | 2023-05-23 |
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