CN206057588U - It is a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier - Google Patents
It is 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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- CN206057588U CN206057588U CN201621073093.1U CN201621073093U CN206057588U CN 206057588 U CN206057588 U CN 206057588U CN 201621073093 U CN201621073093 U CN 201621073093U CN 206057588 U CN206057588 U CN 206057588U
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- preamplifier
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- rate instrument
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Abstract
This utility model belongs to Radiation monitoring technical field, discloses 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
This utility model belongs to Radiation monitoring technical field, and in particular to a kind of based on double hemisphere tellurium-zinc-cadmium detectors and double
The dose rate instrument of preamplifier.
Background technology
Cadmium-zinc-teiluride (hereinafter referred to as CZT) crystal is used for into the maturation of the Technical comparing in terms of Radiation monitoring both at home and abroad, at present
Jing discloses plane, mixing handheld, Frisch's grid-type and dome-type tellurium-zinc-cadmium detector etc., and wherein dome-type CZT is visited
Survey device shape and be generally cuboid, electric field is class dome-type, 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.
The suitability 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.
Utility model content
(1) utility model purpose
According to the problems of prior art, it is high that this utility model provides a kind of energy resolution height, detection efficient
Dose rate instrument.
(2) technical scheme
In order to solve the problems of prior art, the technical scheme that this utility model is provided is as follows：
It is a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier, the dose rate instrument includes detection
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 arranged on circuit by the way of left and right is put
On plate, below circuit board, at each CZT crystal of correspondence, 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 running 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 molding, 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, is used 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
This utility model provide dose rate instrument, the detector include two dome-type CZT crystal, dual preamplifier and
Two-channel digital multiple tracks, from existing two dome-types CZT crystal adopt common-anode combination and electric field for class ball-type different, this reality
Adopted cathode plane and placed for the mode of adjacent surface i.e. " common cathode " with new, the electric field non-sphere of combination is defeated from two-way CZT crystal
The signal for going out is respectively connected to two-way preamplifier, 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.It is right that test is proved
The detection efficient of Am-241 (59.5keV) improves about 13 times, improves about 40% to the energy resolution of different radioactive sources, tool
Body is as shown in table 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 diagrams 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
This utility model is further elaborated below in conjunction with specification drawings and specific embodiments.
Embodiment
It is a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier, the dose rate instrument includes detection
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
It is anode that a maximum face of crystalline areas connects positive high voltage, and other 5 faces ground connection are negative electrode；What two crystal were 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 of correspondence
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 running 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 molding, peak value judgement and extraction, power spectrum systematic function.
The portable module power supply is lithium battery group, is used when going out to carry, battery management chip control 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 cathode " relative to " common-anode " in mental retardation
Amount its detection efficient of area is significantly improved.
Claims (7)
1. it is 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 it is 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 of correspondence 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 running voltage of device offer ± 12V；
The signal processing system includes two-channel digital multiple tracks, liquid crystal touch screen and computer.
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 |
|---|---|---|---|
| CN201621073093.1U CN206057588U (en) | 2016-09-22 | 2016-09-22 | It is a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621073093.1U CN206057588U (en) | 2016-09-22 | 2016-09-22 | It is a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206057588U true CN206057588U (en) | 2017-03-29 |
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ID=58366141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621073093.1U Active CN206057588U (en) | 2016-09-22 | 2016-09-22 | It is a kind of based on double hemisphere tellurium-zinc-cadmium detectors and the dose rate instrument of dual preamplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206057588U (en) |
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2016
- 2016-09-22 CN CN201621073093.1U patent/CN206057588U/en active Active
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