A proportional counter exposure response calibration system, method and apparatus for thermal neutron detection
By employing a combined detection device and processor calibration method, the calibration problem of thermal neutron fluence response of proportional tubes under high-temperature conditions was solved, ensuring detection accuracy and consistency, and making it suitable for thermal neutron detection under high-temperature conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TSINGHUA UNIVERSITY
- Filing Date
- 2023-12-18
- Publication Date
- 2026-06-19
AI Technical Summary
Existing technologies have failed to effectively address the calibration problem of thermal neutron fluence response in proportional tubes at high-temperature environments different from room temperature, resulting in insufficient detection accuracy.
A proportional tube fluence response calibration system for thermal neutron detection is provided, comprising a combined detection device, a temperature chamber, a neutron radiation source, a proportional tube, a temperature probe, and a signal counter. The system obtains the number of neutrons detected by the proportional tube at different temperatures and performs calibration using a processor.
It achieves precise calibration of the proportional tube flux response under different temperature environments, ensuring the accuracy and consistency of detection, and is suitable for thermal neutron detection in high-temperature environments.
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Figure CN117930323B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of neutron detection, specifically to a proportional tube fluence response calibration system, method, and apparatus for thermal neutron detection. Background Technology
[0002] Proportional tubes for thermal neutron detection have the capability to detect thermal neutrons. Their sensitive cavity contains special materials, such as He-3 and B-10. These materials can undergo nuclear reactions with thermal neutrons and have a large reaction cross-section. Therefore, the thermal neutron fluence response of this type of proportional tube is relatively large.
[0003] The inventors discovered that current thermal neutron detection using proportional tubes is generally performed at room temperature. However, in practice, the proportional tubes used for thermal neutron detection may not be at room temperature but at other temperatures, such as high temperatures. For example, in oil well logging applications, proportional tubes with thermal neutron detection capabilities (such as He-3 tubes, BF3 tubes, and boron-coated tubes) operate at approximately 180°C. The energy of thermal neutrons in high-temperature environments is higher than that in room temperature environments. Since the neutron reaction cross-section is energy-dependent, the thermal neutron flux response of the proportional tube also changes accordingly. Therefore, the thermal neutron flux response calibrated at room temperature is not suitable for high-temperature environments. Currently, there are no literature reports on how to calibrate the thermal neutron flux response under other temperature environments. Therefore, there is an urgent need for a calibration scheme for the thermal neutron flux response of proportional tubes operating under conditions different from room temperature. Summary of the Invention
[0004] The purpose of this application is to provide a proportional tube fluence response calibration system, method, and apparatus for thermal neutron detection, so as to calibrate the proportional tube fluence response for thermal neutron detection under different temperature environments.
[0005] The technical solution of this application is as follows:
[0006] In a first aspect, embodiments of this application provide a proportional tube fluence response calibration system for thermal neutron detection, the system comprising:
[0007] Combined detection device;
[0008] A temperature chamber is provided, in which the combined detection device is placed, and the temperature chamber is used to provide a temperature environment for the combined detection device.
[0009] A neutron radiation source used to release neutrons;
[0010] N proportional tubes are placed in the combined detection device. The N proportional tubes are at the same depth in the combined detection device. Each proportional tube is used to detect neutrons released by the neutron radiation source. N is a positive integer.
[0011] M temperature probes are placed in the combined detection device. Each proportional tube is equipped with at least one temperature probe. Each temperature probe is used to detect the temperature information at the depth of its corresponding proportional tube. M is a positive integer.
[0012] A signal counter, connected to each of the proportional tubes respectively, is used to obtain a first number of thermal neutrons detected by each proportional tube when the temperature information is a reference temperature, and to obtain a second number of thermal neutrons detected by each proportional tube when the temperature information is a first temperature, and to send the first number and the second number to the processor, wherein the first temperature is different from the reference temperature;
[0013] The processor is configured to calibrate the flux response of each of the proportional tubes used for detecting thermal neutrons at the first temperature based on the first quantity and the second quantity.
[0014] In some embodiments of this application, the combined detection device includes a neutron emitting section and P neutron detection sections arranged circumferentially around the neutron emitting section, wherein the P neutron detection sections have the same depth and P is a positive integer;
[0015] The neutron radiation source is placed inside the neutron radiation section, or the neutron radiation source is suspended in the axial direction of the neutron radiation section;
[0016] Each neutron detector is equipped with a proportional tube and at least one temperature probe for detecting temperature information at the depth of the proportional tube.
[0017] In some embodiments of this application, P neutron detectors are arranged at equal intervals around the neutron emitting part in the circumferential direction.
[0018] In some embodiments of this application, the neutron emitting part is composed of graphite material and a first metal material, and the neutron detection part is composed of the graphite material and a second metal material, wherein the first metal material includes at least iron and lead, and the second metal material includes cadmium.
[0019] In some embodiments of this application, the neutron emitting part is a cylindrical structure, and the neutron detection part is an arc-shaped structure.
[0020] In some embodiments of this application, the neutrons that the neutron radiation source can release within its energy range include at least thermal neutrons, hyperthermal neutrons, and fast neutrons.
[0021] Secondly, embodiments of this application also provide a method for calibrating the fluence response of a proportional tube for thermal neutron detection. This method is applied to a processor in the proportional tube fluence response calibration system for thermal neutron detection described in any one of the above claims. The method includes:
[0022] The first number of thermal neutrons detected by each proportional tube when the temperature information is the reference temperature is obtained, and the second number of thermal neutrons detected by each proportional tube when the temperature information is the first temperature is obtained.
[0023] Based on the first quantity and the second quantity, the flux response of each of the proportional tubes used for detecting thermal neutrons at the first temperature is calibrated.
[0024] Thirdly, a proportional tube fluence response calibration device for thermal neutron detection is provided, the device being used in a processor within the proportional tube fluence response calibration system for thermal neutron detection described in any one of the above embodiments, the device comprising:
[0025] The acquisition module is used to acquire a first number of thermal neutrons detected by each proportional tube when the temperature information is the reference temperature, and a second number of thermal neutrons detected by each proportional tube when the temperature information is the first temperature.
[0026] A determination module is used to calibrate the flux response of each of the proportional tubes used for detecting thermal neutrons at the first temperature based on the first quantity and the second quantity.
[0027] Fourthly, embodiments of this application provide an electronic device, which includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor. When the program or instructions are executed by the processor, they implement the steps of the proportional tube fluence response calibration method for thermal neutron detection described in any of the embodiments of this application.
[0028] Fifthly, embodiments of this application provide a readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the proportional tube fluence response calibration method for thermal neutron detection as described in any embodiment of this application.
[0029] Sixthly, embodiments of this application provide a computer program product in which instructions, when executed by a processor of an electronic device, enable the electronic device to perform the steps of the proportional tube fluence response calibration method for thermal neutron detection as described in any embodiment of this application.
[0030] The technical solutions provided by the embodiments of this application bring at least the following beneficial effects:
[0031] The proportional tube fluence response calibration system for thermal neutron detection provided in this application includes: a combined detection device and a temperature chamber for placing the combined detection device and providing a temperature environment for the combined detection device; N proportional tubes for detecting neutrons emitted by a neutron radiation source; M temperature probes for detecting temperature information at the depth of each proportional tube; a first number of thermal neutrons detected by each proportional tube when the temperature information is a reference temperature; and a second number of thermal neutrons detected by each proportional tube when the temperature information is the first temperature. The first number and the second number are sent to a signal counter of the processor. Then, the processor can calibrate the fluence response of each proportional tube for detecting thermal neutrons at the first temperature based on the first number and the second number, thereby determining the consistency of the fluence response of proportional tubes in the same batch.
[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description
[0033] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.
[0034] Figure 1 This is a schematic diagram of the structure of a proportional tube fluence response calibration system for thermal neutron detection provided in an embodiment of this application;
[0035] Figure 2 This is a front view of the combined detection device provided in the embodiments of this application;
[0036] Figure 3 This is a top view of the combined detection device provided in the embodiments of this application;
[0037] Figure 4 This is a schematic flowchart of a proportional tube fluence response calibration method for thermal neutron detection provided in an embodiment of this application;
[0038] Figure 5 This is a schematic diagram of the structure of a proportional tube fluence response calibration device for thermal neutron detection provided in an embodiment of this application;
[0039] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation
[0040] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.
[0041] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples consistent with some aspects of this application as detailed in the appended claims.
[0042] As shown in the background section, there is currently no calibration scheme for the flux response of neutrons under temperature conditions other than room temperature. To solve the above problem, this application provides a flux response calibration system, method, and apparatus for proportional tubes used for thermal neutron detection. The system includes: N proportional tubes for detecting neutrons released from a neutron radiation source; M temperature probes for detecting the temperature information at the depth of each proportional tube; a signal counter for obtaining a first number of thermal neutrons detected by each proportional tube when the temperature information is a reference temperature; and a second number of thermal neutrons detected by each proportional tube when the temperature information is the first temperature. The first and second numbers are sent to a signal counter of a processor. The processor can then calibrate the flux response of each proportional tube used for detecting thermal neutrons at the first temperature based on the first and second numbers, thereby determining the consistency of the flux response of proportional tubes in the same batch.
[0043] The neutron fluence response calibration system provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.
[0044] Figure 1 This is a schematic diagram of the structure of a proportional tube fluence response calibration system for thermal neutron detection provided in an embodiment of this application, as shown below. Figure 1 As shown, the proportional tube fluence response calibration system 100 for thermal neutron detection may include a combined detection device 110, a temperature chamber 120, a neutron radiation source 130, a proportional tube 140, a temperature probe 150, a signal counter 160, and a processor 170.
[0045] Combined detection device 110;
[0046] The combined detection device 110 is placed in the temperature chamber 120, and the temperature chamber 120 is used to provide a temperature environment for the combined detection device 110.
[0047] Neutron source 130, used to release neutrons;
[0048] Proportional tube 140, there can be N proportional tubes, the N proportional tubes are at the same depth in the combined detection device 110, each proportional tube 140 is used to detect neutrons released by a neutron radiation source, where N is a positive integer;
[0049] Temperature probe 150, there can be M temperature probes here. A proportional tube can be configured with at least one temperature probe. Each temperature probe is used to detect the temperature information at the depth of its corresponding proportional tube. M is a positive integer.
[0050] The signal counter 160 is connected to each proportional tube respectively, and is used to obtain the first number of thermal neutrons detected by each proportional tube when the temperature information is the reference temperature, and to obtain the second number of thermal neutrons detected by each proportional tube when the temperature information is the first temperature, and send the first number and the second number to the processor, wherein the first temperature is different from the reference temperature.
[0051] Processor 170 is used to calibrate the fluence response of each proportional tube used for detecting thermal neutrons at a first temperature based on a first quantity and a second quantity.
[0052] The reference temperature can be a temperature used to reference the first temperature, such as room temperature, which is the temperature of the combined detection device when the temperature chamber does not provide any temperature to the combined detection device.
[0053] It should be noted that the reference temperature in the following embodiments of this application is based on room temperature.
[0054] The first temperature can be any temperature different from the reference temperature provided by the combined detection device using a temperature chamber. For example, it can be a high temperature, such as 200℃.
[0055] It should be noted that since the N proportional tubes are at the same depth within the combined detection device 110, the temperature at each proportional tube's depth is the same.
[0056] The first quantity can be the number of thermal neutrons detected by each proportional tube, with the temperature information as the reference temperature.
[0057] The second quantity can be the number of thermal neutrons detected by each proportional tube when the temperature information is the first temperature.
[0058] It should be noted that when using a proportional tube to detect neutrons, the proportional tube can actually detect neutrons of all energy ranges emitted by the neutron radiation source. That is, the proportional tube can detect thermal neutrons, as well as ultrathermal neutrons and fast neutrons. However, the number of ultrathermal and fast neutrons detected is relatively small compared to thermal neutrons. In other words, the vast majority of neutrons detected by the proportional tube are thermal neutrons, and the number of fast and ultrathermal neutrons can be ignored. Therefore, the number of neutrons detected by the proportional tube can be considered to be the number of thermal neutrons detected.
[0059] It should be noted that since the N proportional tubes are at the same depth within the combined detection device 110, the temperatures measured by the temperature probes used to detect the proportional tubes are also consistent. Therefore, the signal counter needs to record the first (or second) number of neutrons detected by each proportional tube only when the temperatures measured by each temperature probe are consistent and stable.
[0060] It should be noted that after the neutron radiation source releases neutrons, the combined detection device can slow them down. The neutrons move to various regions of the combined detection device, and the number of neutrons in the region where the proportional tube is located can be detected by using a proportional tube.
[0061] The aforementioned signal counter 160 may be placed outside the combined detection device 110, away from the combined detection device 110, and the signal counter may be connected to each proportional tube via a cable.
[0062] In some embodiments of this application, the specific method by which the processor calibrates the fluence response of each proportional tube used for detecting thermal neutrons at a first temperature based on a first quantity and a second quantity will be described in detail in later embodiments.
[0063] In some embodiments of this application, reference is made to Figure 2 and Figure 3 ,in, Figure 2 This is a front view of the combined detection device 110. Figure 3 This is a top view of the combined detection device 110. The proportional tube and temperature probe can be placed in the combined detection device.
[0064] Figure 2 and Figure 3 Only four neutron detectors are shown in the illustration, but this embodiment is not limited to only four. The number of neutron detectors can be set according to user needs and is not limited in this embodiment. Figure 2 and Figure 3 This is merely an example of an embodiment of this application and is not intended to limit the scope of the application.
[0065] Continue to refer to Figure 2 The aforementioned combined detection device may include a neutron emitting section 111 and P neutron detection sections 112 arranged circumferentially around the neutron emitting section. The P neutron detection sections 112 have the same depth, and P is a positive integer.
[0066] In some embodiments, if the neutron radiation source 130 can be placed inside the neutron radiation section 111, then the neutron radiation source 130 can be placed inside the neutron radiation section 111, for example, it can be placed inside... Figure 3 The position is at point H. If the neutron source 130 cannot be placed inside the neutron emitting section 111, the neutron source 130 can be suspended in the axial direction of the neutron emitting section 111.
[0067] The axial direction here can be the direction that divides the neutron-emitting section into two symmetrical parts with the center of the neutron-emitting section as the origin, such as... Figure 2 As shown, the axial direction can be the direction shown in AB.
[0068] Each neutron detection unit 112 contains a proportional tube 140 and at least one temperature probe 150 for detecting the temperature information at the depth of the proportional tube 140. That is, a proportional tube 140 can be placed in one neutron detection unit 112, and the proportional tube 140 in each neutron detection unit 112 is used to detect neutrons emitted from the neutron radiation source 130 into the neutron detection unit 112. Each temperature probe is placed together with its corresponding proportional tube in a neutron detection unit, and each temperature probe is used to detect the temperature information at the depth of the proportional tube in its neutron detection unit.
[0069] In one example, as Figure 2 The example shown uses four neutron detectors. Each neutron detector can contain a proportional tube and at least one temperature probe. For each neutron detector, when the temperature probe detects that the temperature inside the neutron detector is the reference temperature, the first number of neutrons detected by the proportional tube in that neutron detector, obtained by the signal counter, can be read. Then, when the temperature probe detects that the temperature inside the neutron detector is the first temperature, the second number of neutrons detected by the proportional tube in that neutron detector, obtained by the signal counter, can be read. Based on the first and second numbers, the fluence response of each proportional tube used for detecting thermal neutrons at the first temperature can be calibrated.
[0070] In some embodiments, when calibrating the flux response of a proportional tube in a neutron detector for detecting thermal neutrons at a first temperature, the calibration involves calibrating both the first and second quantities of thermal neutrons detected by the proportional tube in that neutron detector. This results in a large computational burden, as each neutron detector requires both a first quantity and a second quantity for flux response calibration at the first temperature. To improve the calibration efficiency of the flux response calibration in each neutron detector, P neutron detectors can be arranged circumferentially at equal intervals around the neutron emitting source, with the neutron emitting source located in the axial direction shown by AB. This ensures that the number of neutrons emitted by the neutron emitting source reaching each neutron detector is relatively similar. Therefore, at the reference temperature, the first quantity of thermal neutrons detected by the proportional tube in each neutron detector can be obtained. Since the P neutron detectors can be arranged circumferentially at equal intervals around the neutron emitting source, with the neutron emitting source located in the axial direction shown by AB... In the case of direction, the number of neutrons released by the neutron radiation source reaching each neutron detector is not significantly different. Therefore, the first number of thermal neutrons detected by each proportional tube should be not significantly different. Thus, the average value (or any of the maximum, minimum, or remaining first number) of the first number of thermal neutrons detected by each proportional tube can be calculated. Subsequently, based on this average value (or any of the maximum, minimum, or remaining first number) and the second number of thermal neutrons detected by the proportional tube in each neutron detector at the first temperature, the fluence response of the proportional tube in the neutron detector used for detecting thermal neutrons at the first temperature can be calibrated. There is no need to calculate the first and second numbers of thermal neutrons detected by the proportional tube in each neutron detector and calibrate the fluence response of the proportional tube in each neutron detector used for detecting thermal neutrons at the first temperature, thereby improving the calibration efficiency of the fluence response of each proportional tube used for detecting thermal neutrons at the first temperature.
[0071] It should be noted that if there is a significantly abnormal first number among the first number of thermal neutrons detected by each proportional tube, it indicates that the proportional tube corresponding to that first number is faulty. Therefore, the significantly abnormal first number can be removed before calculating the average of the first number of thermal neutrons detected by each proportional tube. Subsequently, when the second number of thermal neutrons detected by the proportional tube at the first temperature is obtained, the second number will also be significantly abnormal and needs to be removed as well.
[0072] Since the P neutron detectors can be arranged at equal intervals around the neutron emitting source, and the neutron emitting source is located in the axial direction shown by AB, the number of neutrons emitted by the neutron emitting source reaching each neutron detector is not significantly different. Therefore, at the first temperature, the second number of thermal neutrons detected by the proportional tube in each neutron detector should also be not significantly different. However, in the above embodiment, the average value of the first number of thermal neutrons detected by each proportional tube is calculated only at the reference temperature, instead of calculating the average value of the second number of thermal neutrons detected by the proportional tube in each neutron detector at the first temperature. Then, based on the two average values, the flux response of the proportional tube in each neutron detector used for detecting thermal neutrons at the first temperature is calibrated. This is because the solution of this application is to calibrate the flux response of each proportional tube used for detecting thermal neutrons at the first temperature. Therefore, the flux response of each proportional tube needs to be calibrated. Thus, at the first temperature, it is necessary to obtain the second number of thermal neutrons detected by each proportional tube.
[0073] In the embodiments of this application, the P neutron detection units can be arranged at equal intervals around the neutron emitting unit in the circumferential direction, which improves the calibration efficiency of the flux response of each proportional tube used for detecting thermal neutrons at the first temperature.
[0074] In some embodiments of this application, the neutron emitting part may be composed of graphite material and a first metallic material, and the neutron detection part may be composed of graphite material and a second metallic material. The first metallic material may include, but is not limited to, at least one of the following: iron and lead, and the second metallic material includes cadmium. That is, the first metallic material may be at least one of iron and lead, or it may be other metallic materials besides iron and lead, and is not limited in the embodiments of this application.
[0075] It should be noted that the ratio of graphite material to the first metal material in the neutron emitting section is not limited in the embodiments of this application. Similarly, the ratio of graphite material to the second metal material in the neutron detection section is not limited in the embodiments of this application.
[0076] In some embodiments of this application, the first metallic material is used to moderate neutrons. The second metallic material is used to absorb neutrons.
[0077] In some embodiments of this application, reference is made to Figure 2 The neutron emitting part can be a cylindrical structure, and the neutron detection part can be an arc plate-shaped structure.
[0078] In some embodiments of this application, the neutrons that the neutron radiation source can release within its energy range may include at least thermal neutrons, hyperthermal neutrons, and fast neutrons. The neutrons released by the neutron radiation source can enter the proportional tube cavity so that the proportional tube can detect the neutrons.
[0079] The proportional tube fluence response calibration method for thermal neutron detection provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.
[0080] Figure 4 This is a flowchart illustrating a method for calibrating the fluence response of a proportional tube for thermal neutron detection, as provided in an embodiment of this application. The execution entity of this method can be the aforementioned... Figure 1 The processor is 170.
[0081] like Figure 4 As shown, the proportional tube fluence response calibration method for thermal neutron detection provided in this application embodiment may include steps 410-420.
[0082] Step 410: Obtain the first number of thermal neutrons detected by each proportional tube when the temperature information is the reference temperature, and the second number of thermal neutrons detected by each proportional tube when the temperature information is the first temperature.
[0083] Step 420: Based on the first and second quantities, calibrate the fluence response of each proportional tube used for detecting thermal neutrons at the first temperature.
[0084] In the embodiments of this application, the flux response of each proportional tube used for detecting thermal neutrons at the first temperature can be calibrated by measuring the first number of thermal neutrons detected by each proportional tube when the temperature information is a reference temperature, and the second number of thermal neutrons detected by each proportional tube when the temperature information is a first temperature, thereby determining the consistency of the flux response of proportional tubes in the same batch.
[0085] In some embodiments of this application, in order to accurately calibrate the fluence response of each proportional tube used for detecting thermal neutrons at a first temperature, step 420 may specifically include:
[0086] Calculate the ratio of the first quantity to the second quantity;
[0087] The fluence response of each proportional tube used for detecting thermal neutrons at the first temperature is calibrated based on the ratio and the reference fluence response of each proportional tube.
[0088] The reference fluence response can be the fluence response of each proportional tube used to detect thermal neutrons at a reference temperature. This reference fluence response is known, and can be determined by using existing methods to measure the fluence response of proportional tubes at room temperature.
[0089] In some embodiments of this application, for a certain proportional tube, the flux response of each proportional tube used for detecting thermal neutrons at a first temperature can be calibrated based on the ratio and the reference flux response of the proportional tube. Specifically, the flux response of the proportional tube used for detecting thermal neutrons at the first temperature can be obtained based on the product of the ratio and the reference flux response of the proportional tube.
[0090] In some embodiments of this application, when P neutron detectors are arranged circumferentially around a neutron emitting unit, if the P neutron detectors are not equally spaced, for each neutron detector, the ratio of the first quantity and the second quantity measured by the proportional tube in that neutron detector is calculated. Then, based on this ratio and the reference flux response of the proportional tube in that neutron detector, the flux response of each proportional tube used for detecting thermal neutrons at a first temperature can be calibrated.
[0091] When P neutron detectors are arranged circumferentially around the neutron emitting unit, if the P neutron detectors are equally spaced, firstly, the average value of the first quantity measured by each proportional tube in each neutron detector at a reference temperature is obtained. Then, for each neutron detector, the ratio of the second quantity measured by the proportional tube in that neutron detector to the average value can be calculated. Then, based on this ratio and the reference flux response of the proportional tube in that neutron detector, the flux response of each proportional tube used for detecting thermal neutrons at the first temperature can be calibrated.
[0092] In the embodiments of this application, by calculating the ratio of the first quantity and the second quantity, and based on the ratio and the reference flux response of each proportional tube, the flux response of each proportional tube used for detecting thermal neutrons at the first temperature can be accurately calibrated.
[0093] The solutions provided in this application can be applied to the following scenarios:
[0094] After a manufacturer produces a batch of proportional tubes, the manufacturer's instructions state that the flux response of the neutrons detected by this batch of proportional tubes at 200°C (i.e., the first temperature) is A. After purchasing and receiving this batch of proportional tubes, the user needs to calibrate the flux response of this batch of proportional tubes at 200°C. This can be done by measuring the flux response of this batch of proportional tubes at room temperature (i.e., the reference temperature) using existing methods for measuring flux response at room temperature. Then, this batch of proportional tubes is placed in the thermal neutron detection proportional tube flux response calibration system provided in this application embodiment. The first number of thermal neutrons detected by each proportional tube in this batch at room temperature is measured. Then, the temperature of the combined detection device is raised to 200°C using a temperature chamber, and the second number of thermal neutrons detected by each proportional tube in this batch at 200°C is obtained. Then, based on the first and second numbers, the flux response of each proportional tube in this batch used for detecting thermal neutrons at 200°C is calibrated.
[0095] After obtaining the flux response of each proportional tube in the batch at 200°C using the method of the embodiments of this application according to the first and second quantities, the flux response can be compared with the flux response of each proportional tube in the batch at 200°C provided by a third-party testing unit. If the flux response of each proportional tube in the batch at 200°C provided by the third-party testing unit is within a certain error range and the flux response of each proportional tube in the batch at 200°C obtained through the embodiments of this application is within a certain error range, it indicates that the flux response calibration of the batch of proportional tubes at 200°C has passed. If the flux response of a certain proportional tube in the batch at 200°C provided by the third-party testing unit is not within a certain error range and the flux response of that proportional tube at 200°C obtained through the embodiments of this application is not within a certain error range, it indicates that the proportional tube is problematic and should be discarded when measuring the thermal neutron flux response at 200°C in subsequent measurements.
[0096] It should be noted that the thermal neutron detector proportional tube flux response calibration method provided in this application embodiment can be executed by a thermal neutron detector proportional tube flux response calibration device, or a control module in the thermal neutron detector proportional tube flux response calibration device for executing the thermal neutron detector proportional tube flux response calibration method.
[0097] Based on the same inventive concept as the above-mentioned proportional tube fluence response calibration for thermal neutron detection, this application also provides a proportional tube fluence response calibration device for thermal neutron detection. The following is in conjunction with... Figure 5 The proportional tube fluence response calibration device for thermal neutron detection provided in the embodiments of this application will be described in detail.
[0098] Figure 5 This is a schematic diagram of the structure of a proportional tube fluence response calibration device for thermal neutron detection, according to an exemplary embodiment.
[0099] like Figure 5 As shown, the proportional tube fluence response calibration device 500 for thermal neutron detection can be applied to the above-mentioned... Figure 1 The processor 170 in the thermal neutron detector proportional tube fluence response calibration device 500 includes:
[0100] The acquisition module 510 is used to acquire a first number of thermal neutrons detected by each proportional tube when the temperature information is a reference temperature, and a second number of thermal neutrons detected by each proportional tube when the temperature information is a first temperature.
[0101] The determination module 520 is used to calibrate the flux response of each of the proportional tubes used for detecting thermal neutrons at the first temperature based on the first quantity and the second quantity.
[0102] In the embodiments of this application, the flux response of each proportional tube used for detecting thermal neutrons at the first temperature can be calibrated by measuring the first number of thermal neutrons detected by each proportional tube when the temperature information is a reference temperature, and the second number of thermal neutrons detected by each proportional tube when the temperature information is a first temperature, thereby determining the consistency of the flux response of proportional tubes in the same batch.
[0103] In some embodiments of this application, the determining module 520 may specifically be used for:
[0104] Calculate the ratio of the first quantity to the second quantity;
[0105] Based on the ratio and the reference flux response of each of the proportional tubes, the flux response of each of the proportional tubes used for detecting thermal neutrons at the first temperature is calibrated; wherein the reference flux response is the flux response of each of the proportional tubes used for detecting thermal neutrons at the reference temperature.
[0106] The proportional tube fluence response calibration device for thermal neutron detection provided in this application embodiment can be used to perform the proportional tube fluence response calibration method for thermal neutron detection provided in the above method embodiments. Its implementation principle and technical effect are similar, and will not be described in detail here for the sake of brevity.
[0107] Based on the same inventive concept, embodiments of this application also provide an electronic device.
[0108] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. For example... Figure 6 As shown, the electronic device may include a processor 601 and a memory 602 storing computer programs or instructions.
[0109] Specifically, the processor 601 may include a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of the present invention.
[0110] Memory 602 may include mass storage for data or instructions. For example, and not limitingly, memory 602 may include a hard disk drive (HDD), floppy disk drive, flash memory, optical disk, magneto-optical disk, magnetic tape, or Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, memory 602 may include removable or non-removable (or fixed) media. Where appropriate, memory 602 may be internal or external to the integrated gateway disaster recovery device. In a particular embodiment, memory 602 is non-volatile solid-state memory. Memory may include read-only memory (ROM), random-access memory (RAM), disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical / tangible memory storage devices. Therefore, typically, a memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described in the proportional tube fluence response calibration method for thermal neutron detection provided in the above embodiments.
[0111] The processor 601 reads and executes computer program instructions stored in the memory 602 to implement any of the proportional tube fluence response calibration methods for thermal neutron detection in the above embodiments.
[0112] In one example, the electronic device may also include a communication interface 603 and a bus 610. For example, Figure 6 As shown, the processor 601, memory 602, and communication interface 603 are connected through bus 610 and complete communication with each other.
[0113] The communication interface 603 is mainly used to realize communication between various modules, devices, units and / or devices in the embodiments of the present invention.
[0114] Bus 610 includes hardware, software, or both, that couples components of an electronic device together. For example, and not limitingly, the bus may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an Infinite Bandwidth Interconnect, a Low Pin Count (LPC) bus, a memory bus, a Microchannel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local (VLB) bus, or other suitable buses, or combinations of two or more of these. Where appropriate, bus 610 may include one or more buses. Although specific buses are described and illustrated in embodiments of the invention, the invention contemplates any suitable bus or interconnect.
[0115] This electronic device can execute the proportional tube fluence response calibration method for thermal neutron detection in the embodiments of the present invention, thereby achieving... Figure 4 The described method for calibrating the proportional tube fluence response of thermal neutron detection.
[0116] Furthermore, in conjunction with the thermal neutron detection proportional tube fluence response calibration method in the above embodiments, this invention can be implemented using a readable storage medium. This readable storage medium stores program instructions, which, when executed by a processor, implement any of the thermal neutron detection proportional tube fluence response calibration methods in the above embodiments.
[0117] In addition, in conjunction with the thermal neutron detection proportional tube fluence response calibration method in the above embodiments, the present invention can provide a computer program product, wherein when the instructions in the computer program product are executed by the processor of an electronic device, the electronic device performs any one of the thermal neutron detection proportional tube fluence response calibration methods in the above embodiments.
[0118] It should be clarified that the present invention is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of the present invention.
[0119] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this invention are programs or code segments used to perform the required tasks. The programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.
[0120] It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.
[0121] The aspects of this application have been described above with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block in the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executable via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions / actions specified in one or more blocks of the flowchart illustrations and / or block diagrams. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can also be implemented by dedicated hardware performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.
[0122] The above description is merely a specific embodiment of the present invention. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.
Claims
1. A proportional counter fluence response calibration system for thermal neutron detection, characterized by, The system includes: Combined detection device; A temperature chamber is provided, in which the combined detection device is placed, and the temperature chamber is used to provide a temperature environment for the combined detection device. A neutron radiation source used to release neutrons; N proportional tubes are placed in the combined detection device. The N proportional tubes are at the same depth in the combined detection device. Each proportional tube is used to detect neutrons released by the neutron radiation source. N is a positive integer. M temperature probes are placed in the combined detection device. Each proportional tube is equipped with at least one temperature probe. Each temperature probe is used to detect the temperature information at the depth of its corresponding proportional tube. M is a positive integer. A signal counter, connected to each of the proportional tubes respectively, is used to obtain a first number of thermal neutrons detected by each proportional tube when the temperature information is a reference temperature, and to obtain a second number of thermal neutrons detected by each proportional tube when the temperature information is a first temperature, and to send the first number and the second number to the processor, wherein the first temperature is different from the reference temperature; The processor is configured to calibrate the flux response of each proportional tube used for detecting thermal neutrons at the first temperature based on the ratio of the first quantity to the second quantity and the reference flux response of each proportional tube; wherein the reference flux response is the flux response of each proportional tube used for detecting thermal neutrons at the reference temperature.
2. The system of claim 1, wherein, The combined detection device includes a neutron emitting section and P neutron detection sections arranged circumferentially around the neutron emitting section, wherein the P neutron detection sections have the same depth and P is a positive integer; The neutron radiation source is placed inside the neutron radiation section, or the neutron radiation source is suspended in the axial direction of the neutron radiation section; Each neutron detector is equipped with a proportional tube and at least one temperature probe for detecting temperature information at the depth of the proportional tube.
3. The system of claim 2, wherein, P neutron detectors are arranged at equal intervals around the neutron emitting part in a circumferential direction.
4. The system of claim 2, wherein, The neutron emitting part is composed of graphite material and a first metal material, and the neutron detection part is composed of the graphite material and a second metal material. The first metal material includes at least iron and lead, and the second metal material includes cadmium.
5. The system of claim 2, wherein, The neutron emitting part has a cylindrical structure, and the neutron detection part has an arc-shaped structure.
6. The system of claim 2, wherein, The neutron radiation source is capable of releasing at least the following types of neutrons: thermal neutrons, hyperthermal neutrons, and fast neutrons.
7. A method for calibrating the fluence response of a proportional tube for thermal neutron detection, characterized in that, The method is implemented based on the proportional tube fluence response calibration system for thermal neutron detection as described in any one of claims 1-6, and the method includes: The first number of thermal neutrons detected by each proportional tube when the temperature information is the reference temperature is obtained, and the second number of thermal neutrons detected by each proportional tube when the temperature information is the first temperature is obtained. Based on the first quantity and the second quantity, the flux response of each of the proportional tubes used for detecting thermal neutrons at the first temperature is calibrated.