CN217639561U - Device for realizing neutron measurement by adopting elpasolite - Google Patents
Device for realizing neutron measurement by adopting elpasolite Download PDFInfo
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- CN217639561U CN217639561U CN202122165717.XU CN202122165717U CN217639561U CN 217639561 U CN217639561 U CN 217639561U CN 202122165717 U CN202122165717 U CN 202122165717U CN 217639561 U CN217639561 U CN 217639561U
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- 238000005259 measurement Methods 0.000 title claims abstract description 9
- 239000013078 crystal Substances 0.000 claims abstract description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 5
- 239000010703 silicon Substances 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 35
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 5
- 229910001610 cryolite Inorganic materials 0.000 claims description 5
- 229910052700 potassium Inorganic materials 0.000 claims description 5
- 239000011591 potassium Substances 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 230000005251 gamma ray Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model discloses an adopt elpasolite to realize neutron measuring device, including elpasolite neutron detector, a comparator, discriminator and little the control unit MCU, what the front end unit of elpasolite neutron detector adopted is CLYC (Ce) scintillation crystal, through CLYC (Ce) scintillation crystal coupling silicon photomultiplier SiPM, will measure the neutron and change into and measure pulse signal, amplify pulse signal through the inside amplifier of CLYC (Ce) scintillation crystal, and will handle the back and jet out the pulse, pass through in proper order the comparator, discriminator reprocess, the pulse signal of the standard after handling is imported to little the control unit MCU and is gathered the count, little the control unit MCU realizes ultimate storage, demonstration after handling. The utility model discloses can simultaneous test neutron and gamma ray, use portably, the reliability is high, provides important using value in portable neutron measurement field.
Description
Technical Field
The utility model relates to a radiation detection technology field especially relates to an adopt potassium cryolite to realize neutron measuring device.
Background
In the field of radiation detection, neutrons are uncharged high-energy particles that are difficult to detect because they do not directly cause ionization of matter. The traditional neutron detection material is 3He gas, but with the rapid development of neutron detection technology, the resource supply of 3He cannot meet the requirement, and a new neutron material needs to be explored urgently. Among candidate neutron detection materials, inorganic scintillators have the outstanding advantage that indirect detection of neutrons by means of secondary charged particles generated by nuclear reactions between 6Li, 10B elements in the crystal and the neutrons is one of the important approaches to replace 3He gas detectors. However, since neutrons have a strong penetrating power and are generally not easily absorbed by an object, it is difficult to detect neutrons. Moreover, almost all neutron signals are accompanied by gamma-ray background, and the detector needs to have the capability of distinguishing the gamma background signals as much as possible, so that the actual distinguishing effect is not good. With the increasingly wide application of neutron detection in the fields of nuclear energy utilization, military equipment control, anti-terrorism security inspection and the like, the effective and accurate detection of neutrons is one of important research contents of nuclear radiation detection.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects and shortcomings of the prior art, the device for realizing neutron measurement by adopting elpasolite is provided, neutrons and gamma rays can be simultaneously tested, the use is simple and convenient, the reliability is high, and the device provides important application value in the field of portable neutron measurement.
For realizing the utility model aims at providing an adopt elpasolite to realize neutron measuring device, including high-pressure module, elpasolite neutron detector, a comparator, discriminator and little the control unit MCU, what the front end unit of elpasolite neutron detector adopted is CLYC (Ce) scintillation crystal, through CLYC (Ce) scintillation crystal coupling silicon photomultiplier SiPM, will measure the neutron and change into measurement pulse signal, amplify pulse signal through the inside amplifier of CLYC (Ce) scintillation crystal, and the pulse of penetrating after will handling, pass through in proper order the comparator, discriminator reprocess, the pulse signal input of standard after the processing is gathered the count to little the control unit MCU, little the control unit MCU realizes ultimate storage after handling, show, high-pressure module provides electric power for potassium cryolite neutron detector.
As a further improvement of the above scheme, the elpasolite neutron detector is a neutron detection module capable of measuring neutrons and gamma, the input and output interfaces of the neutron detection module are designed to be standard PIN type, and specifically include a detector working voltage port, a front power supply 5V port, a power ground port, a signal output port, and a signal ground port, the 5PIN of the neutron detection module is directly embedded into the designed circuit, the designed circuit is connected with the detector working voltage port by adopting a miniaturized DC29V power supply module, the neutron detection module is powered, the signal output port of the neutron detection module is connected into a shaping circuit, and the shaped signal is input into a Micro Control Unit (MCU) for processing and calculation.
As a further improvement of the above scheme, a detector working voltage port of the neutron detection module and a pin 3 of the high-voltage module U2 are connected to the DC29V power supply module, and a pin 1 of the high-voltage module U2 is connected to +5VCC voltage; the pin 2 and the pin 4 are grounded, and the signal output port of the neutron detection module is connected with a current limiting resistor R through a series 4.7K 33 Then, a positive phase input end 3 pin of an LMV7235M5X comparator is connected, a reverse phase input end 4 pin of the LMV7235M5X comparator realizes a comparison threshold value of the LMV7235M5X comparator by adjusting a potentiometer W1 of 10K, and the LMV7235M5X comparator are connectedA threshold test point TP3 is arranged on a connecting circuit of the potentiometer W1, a pin 5 of an LMV7235M5X comparator is connected with +3.3VCC, a pin 2 is connected with GND, a pin 1 signal output is connected with a pin 5 of a CD4528 monostable trigger, a pin 4 of the CD4528 monostable trigger is grounded, a pin 3 of the CD4528 monostable trigger is connected with +3.3VCC, a standard square wave signal generated by the output of a pin 6 of the CD4528 monostable trigger along with the trigger of a TP2 signal according to a trigger principle, and the delay time of the square wave is determined by a capacitor C connected with the pins 1 and 2 of the CD4528 monostable trigger 27 Resistance R 37 And determining that the signal shaped by the 6 pin of the CD4528 monostable trigger is accessed to the counting end of the STM32 singlechip to realize the timing counting of the MCU.
The utility model has the advantages that:
compared with the prior art, the utility model provides a pair of adopt potassium cryolite to realize neutron measuring device, what this detection device's front end unit adopted is that the CLYC (Ce) ("CLYC") scintillator crystal of cerium has been doped, has very high light yield, and the neutron of every MeV can produce 70000 photons. The CLYC (Ce) scintillation crystal achieves detection of neutrons based on the following neutron reactions: 6Li + n + → 3H (2.75 MeV) +4He (2.05 MeV), i.e., incident neutrons cause a nuclear reaction after being captured by the CLYC (Ce) scintillation crystal, and the charged particles produced by the nuclear reaction give a detectable output pulse. According to the principle, the CLYC (Ce) scintillation crystal is coupled with a silicon photomultiplier SiPM, and the front-end device is packaged by one module and can be directly applied. This front end device will measure the neutron and convert into and measure pulse signal, amplify pulse signal through the inside amplifier of CLYC (Ce) scintillation crystal to the pulse that jets out after will handling, pass through the comparator in proper order, examine the ware and reprocess, the pulse signal of the standard after handling inputs micro control unit MCU and gathers the count, and micro control unit MCU realizes ultimate storage, demonstration after handling. The utility model provides a pair of adopt potassium cryolite to realize neutron measuring device can simultaneous test neutron and gamma ray, uses portably, the reliability is high, provides important using value in portable neutron measurement field.
Drawings
The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings, in which:
FIG. 1 is a schematic block diagram of the present invention;
FIG. 2 is a schematic circuit diagram of the present invention;
fig. 3 is a diagram of a neutron pulse signal recorded by an oscilloscope in a thermal neutron field and output by a neutron detection module.
Detailed Description
As shown in figure 1, the utility model provides a pair of adopt elpasolite to realize neutron measuring device, including elpasolite neutron detector, a comparator, discriminator and little the control unit MCU, what the front end unit of elpasolite neutron detector adopted is CLYC (Ce) scintillation crystal, through CLYC (Ce) scintillation crystal coupling silicon photomultiplier SiPM, it changes the measurement pulse signal into to measure the neutron, amplify pulse signal through the inside amplifier of CLYC (Ce) scintillation crystal, and the pulse of penetrating after will handling, pass through the comparator in proper order, discriminator retreats, the pulse signal of the standard after handling inputs little the control unit MCU and gathers the count, little the control unit MCU realizes ultimate storage after handling, show.
As shown in fig. 2, the elpasolite neutron detector is a neutron detection module capable of measuring neutrons and γ, the input and output interfaces of the neutron detection module are designed to be standard PIN type, and specifically include a detector working voltage port, a front power supply 5V port, a power ground port, a signal output port, and a signal ground port, the 5PIN of the neutron detection module is directly embedded into the designed circuit, the designed circuit is connected with the detector working voltage port by adopting a miniaturized DC29V power supply module to supply power to the neutron detection module, the signal output port of the neutron detection module is connected into a shaping circuit, and the shaped signal is input into a micro control unit MCU for processing and calculation.
In further improvement, a detector working voltage port of the neutron detection module and a pin 3 of the high-voltage module U2 are connected with the DC29V power supply module together, and a pin 1 of the high-voltage module U2 is connected with +5VCC voltage; 2. pin and 4-pin are grounded, neutron detection moduleThe signal output port of the amplifier is connected with a current limiting resistor R of 4.7K in series 33 A positive phase input end pin 3 of an LMV7235M5X comparator is connected later, a reverse phase input end pin 4 of the LMV7235M5X comparator realizes a comparison threshold of the LMV7235M5X comparator by adjusting a potentiometer W1 of 10K, a threshold test point TP3 is arranged on a connecting circuit of the LMV7235M5X comparator and the potentiometer W1, a pin 5 of the LMV7235M5X comparator is connected with +3.3VCC, a pin 2 is connected with GND, a pin 1 signal output is connected with a pin 5 of a CD4528 monostable trigger, a pin 4 of the CD4528 monostable trigger is grounded, a pin 3 of the CD4528 monostable trigger is connected with +3.3VCC, a standard square wave signal which can be generated along with the triggering of a TP2 signal is output of a pin 6 of the CD4528 monostable trigger according to a trigger principle, and a time delay square wave of the square wave is generated by a capacitor C connected with the pins 1 and 2 of the CD4528 monostable trigger 27 Resistance R 37 And determining that the signal shaped by the 6 pins of the CD4528 monostable trigger is accessed to the counting end of the STM32 singlechip to realize the timing counting of the MCU.
The neutron detection module is placed in a thermal neutron field, and an oscilloscope records neutron pulse signals, wherein the amplitude is about 477mV, as shown in figure 3. The signal is passed through an LMV7235M5X comparator, an input threshold TP3 of the LMV7235M5X comparator is adjusted to ensure an output signal of TP2, and the output signal passes through a CD4528 monostable trigger and outputs a standard pulse signal.
The device has the advantages of high thermal neutron detection efficiency, fast and slow neutron response, strong gamma discrimination capability, fast time response, large output amplitude, low noise and the like, can be used for instruments and meters such as neutron personal dosimeters, neutron alarms, neutron polling instruments and neutron equivalent dosimeters, and can also be used for replacing 3He proportional counting tubes.
The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above embodiments are only used for illustrating the technical solutions of the present invention and are not limited thereto, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of the technical solutions of the present invention.
Claims (3)
1. The utility model provides an adopt potassium cryolite to realize neutron measuring device which characterized in that: the device comprises a high-voltage module, an elpasolite neutron detector, a comparator, a discriminator and a micro control unit MCU, wherein a CLYC (Ce) scintillation crystal is adopted as a front-end unit of the elpasolite neutron detector, the CLYC (Ce) scintillation crystal is coupled with a silicon photomultiplier SiPM, measured neutrons are converted into measured pulse signals, the pulse signals are amplified by an amplifier inside the CLYC (Ce) scintillation crystal, processed emitted pulses sequentially pass through the comparator and the discriminator, the processed standard pulse signals are input into the micro control unit MCU to be collected and counted, the micro control unit MCU realizes final storage and display after processing, and the high-voltage module provides electric power for the elpasolite neutron detector.
2. The apparatus of claim 1, wherein the apparatus comprises: the elpasolite neutron detector is a neutron detection module capable of measuring neutrons and gamma, an input interface and an output interface of the neutron detection module are designed into a standard PIN type and specifically comprise a detector working voltage port, a front power supply 5V port, a power ground port, a signal output port and a signal ground port, a 5PIN PIN of the neutron detection module is directly embedded into a designed circuit, the designed circuit is connected with the detector working voltage port through a miniaturized DC29V power supply module and supplies power to the neutron detection module, the signal output port of the neutron detection module is connected into a shaping circuit, and a shaped signal is input to a Micro Control Unit (MCU) for processing and calculation.
3. The apparatus of claim 2, wherein the apparatus is configured to perform neutron measurements using elpasolite, and further comprising: a detector working voltage port of the neutron detection module and a pin 3 of the high-voltage module U2 are connected with the DC29V power supply module together, and a pin 1 of the high-voltage module U2 is connected with +5VCC voltage; the pin 2 and the pin 4 are grounded, and the signal output port of the neutron detection module is connected with a current-limiting resistor R through a 4.7K current-limiting resistor R in series 33 A rear-connected LMV7235M5X comparator positive phase input end 3 pin, LMV72A reverse input end 4 pin of a 35M5X comparator realizes a comparison threshold of an LMV7235M5X comparator by adjusting a potentiometer W1 of 10K, a threshold test point TP3 is arranged on a connecting circuit of the LMV7235M5X comparator and the potentiometer W1, a pin 5 of the LMV7235M5X comparator is connected with +3.3VCC, a pin 2 is connected with GND, a pin 1 signal output is connected with a pin 5 of a CD4528 monostable trigger, a pin 4 of the CD4528 monostable trigger is connected with ground, a pin 3 of the CD4528 monostable trigger is connected with +3.3VCC, a standard square wave signal can be generated by the output of the pin 6 of the CD4528 monostable trigger along with the triggering of the TP2 signal according to the trigger principle, and the delay time of the square wave is connected with capacitors C of the pin 1 and the pin 2 of the CD4528 monostable trigger 27 Resistance R 37 And determining that the signal shaped by the 6 pin of the CD4528 monostable trigger is accessed to the counting end of the STM32 singlechip to realize the timing counting of the MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122165717.XU CN217639561U (en) | 2021-09-08 | 2021-09-08 | Device for realizing neutron measurement by adopting elpasolite |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122165717.XU CN217639561U (en) | 2021-09-08 | 2021-09-08 | Device for realizing neutron measurement by adopting elpasolite |
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| CN217639561U true CN217639561U (en) | 2022-10-21 |
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| CN202122165717.XU Active CN217639561U (en) | 2021-09-08 | 2021-09-08 | Device for realizing neutron measurement by adopting elpasolite |
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- 2021-09-08 CN CN202122165717.XU patent/CN217639561U/en active Active
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| CB03 | Change of inventor or designer information |
Inventor after: Liu Bing Inventor before: Liu Bing Inventor before: Yang Song Inventor before: Zhang Xiaoquan Inventor before: Zhang Yanting Inventor before: Deng Changming Inventor before: Ma Huimin |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240124 Address after: 100088, 16, Xinjie street, Xicheng District, Beijing Patentee after: Characteristic medical center of rocket army of Chinese PLA Country or region after: China Address before: No. 16, xinwai street, Xicheng District, Beijing 100032 Patentee before: Characteristic medical center of rocket army of Chinese PLA Country or region before: China Patentee before: CHINA INSTITUTE FOR RADIATION PROTECTION |