Current detection method, device and equipment of nuclear detector, medium and program product

Abstract

The invention discloses a current detection method, device and equipment for a nuclear detector, a medium and a program product, and the method comprises the steps: adjusting the temperature of an environment where the nuclear detector is located to a first temperature, so as to control a detection assembly to be switched to a superconducting state; wherein a pickup coil of the nuclear detector is subjected to current injection operation in advance; the detection assembly is electrically connected to the two ends of the pickup coil; detecting a magnetic flux change state of the pickup coil through a detection assembly in a superconducting state; and detecting whether the current injection operation successfully injects the current or not based on the magnetic flux change state.

Description

Technical Field

[0001] This application relates to the field of nuclear detection technology, and particularly to a method, device, equipment, medium and program product for detecting the current of a nuclear detector. Background Art

[0002] Through a Superconducting Quantum Interference Device (SQUID), it is possible to achieve high-accuracy and high-resolution detection of γ-rays emitted by isotopes. The absorber of the SQUID is usually an Au:Er sensor, and its pick-up coil has the functions of providing a magnetic field and picking up the induced current.

[0003] Before starting the detection process, it is necessary to inject a superconducting current into the pick-up coil using a gold-palladium thermal switch so that the pick-up coil can provide a magnetic field and enable the magnetocalorimeter to work properly subsequently. However, in the related art, it is impossible to confirm whether the superconducting current is successfully injected. Summary of the Invention

[0004] Based on the above technical problems, the embodiments of this application provide a method, device, equipment, medium and program product for detecting the current of a nuclear detector.

[0005] The technical solution provided by the embodiments of this application is as follows:

[0006] The embodiments of this application first provide a method for detecting the current of a nuclear detector, and the method includes:

[0007] Adjust the temperature of the environment where the nuclear detector is located to a first temperature to control the detection component to switch to the superconducting state; wherein, the pick-up coil of the nuclear detector has been pre-performed with a current injection operation; the detection component is electrically connected to both ends of the pick-up coil;

[0008] Detect the magnetic flux change state of the pick-up coil through the detection component in the superconducting state;

[0009] Based on the magnetic flux change state, detect whether the current injection operation successfully injects current.

[0010] In some embodiments, the method includes:

[0011] Obtain a first mapping relationship; wherein, the first mapping relationship includes the corresponding relationship between the magnetic flux change amount and the current amplitude;

[0012] Based on the magnetic flux change state and the first mapping relationship, determine the first current amplitude of the current in the pick-up coil.

[0013] In some embodiments, detecting the magnetic flux change state of the pickup coil by the detection component in the superconducting state includes:

[0014] During the process of adjusting the temperature of the environment from the first temperature to the second temperature, tracking and detecting the magnetic flux change state by the detection component;

[0015] The method further includes:

[0016] Obtaining a second mapping relationship, where the second mapping relationship includes the correspondence between the magnetic flux change amount, the current amplitude, and the temperature data;

[0017] Based on the magnetic flux change state corresponding to the first temperature to the second temperature and the second mapping relationship, determining the second current amplitude of the current in the pickup coil.

[0018] In some embodiments, the detection component includes an aluminum bonding wire and a Josephson junction; detecting the magnetic flux change state of the pickup coil by the detection component in the superconducting state includes:

[0019] Conducting the magnetic flux change state to the Josephson junction through the aluminum bonding wire in the superconducting state for the Josephson junction to detect the magnetic flux change state.

[0020] In some embodiments, before adjusting the temperature of the environment where the nuclear detector is located to the first temperature, the method further includes:

[0021] Adjusting the temperature of the environment where the nuclear detector is located to a third temperature so that the pickup coil and the branch associated with the pickup coil are switched to the superconducting state; wherein the pickup coil and the branch are electrically connected to form a current loop;

[0022] Adjusting the branch from the superconducting state to the resistive state;

[0023] Injecting a current through the input end electrically connected by the pickup coil and the branch to perform the current injection operation.

[0024] In some embodiments, adjusting the branch from the superconducting state to the resistive state includes:

[0025] Injecting a heating current into the heating resistor included in the branch to trigger the heating resistor to heat the branch, so that the branch is switched from the superconducting state to the resistive state.

[0026] In some embodiments, after injecting a current through the input end electrically connected by the pickup coil and the branch, the method further includes:

[0027] Adjust the branch from the resistive state to the superconducting state.

[0028] An embodiment of the present application further provides a current detection device for a nuclear detector. The detection device includes:

[0029] An adjustment module, configured to adjust the temperature of the environment where the nuclear detector is located to a first temperature to control the detection component to switch to the superconducting state; wherein, a current injection operation is pre-executed on the pickup coil of the nuclear detector; the detection component is electrically connected to both ends of the pickup coil;

[0030] A detection module, configured to detect the magnetic flux change state of the pickup coil through the detection component in the superconducting state;

[0031] Based on the magnetic flux change state, detect whether the current injection operation successfully injects current.

[0032] An embodiment of the present application further provides an electronic device, which includes a processor and a memory; a computer program is stored in the memory; when the computer program is executed by the processor, it can implement the current detection method of the nuclear detector as described in any one of the previous paragraphs.

[0033] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored; when the computer program is executed by the processor of an electronic device, it can implement the current detection method of the nuclear detector as described in any one of the previous paragraphs.

[0034] An embodiment of the present application further provides a computer program product, in which a computer program is stored; when the computer program is executed by the processor of an electronic device, it can implement the current detection method of the nuclear detector as described in any one of the previous paragraphs.

[0035] In the current detection method of the nuclear detector provided by the embodiment of the present application, the temperature of the environment where the nuclear detector is located is adjusted to the first temperature to control the detection component to switch to the superconducting state. The two ends of the pickup coil of the nuclear detector are electrically connected to the detection component, and a current injection operation is pre-executed on the pickup coil. Thus, through the above operations, the detection component in the superconducting state can conduct the magnetic flux change state corresponding to the current flow in the pickup coil without loss; and when the current injection operation successfully injects current, by detecting the magnetic flux change state of the pickup coil through the detection component in the superconducting state, the loss of electrical energy corresponding to the current can be reduced, and the accuracy of detecting the magnetic flux change state can also be improved; on this basis, based on the magnetic flux change state, detecting whether the current injection operation successfully injects current can improve the accuracy of the above detection; in summary, the technical solution provided by the embodiment of the present application can flexibly detect whether current is injected into the pickup coil of the nuclear detector without changing the device structure of the nuclear detector. Description of the Drawings

[0036] Figure 1 This is the current detection method for the nuclear detector provided by the embodiment of the present application;

[0037] Figure 2 This is the schematic circuit diagram of the pick-up coil and the detection component of the nuclear detector provided by the embodiment of the present application;

[0038] Figure 3 This is the schematic structural diagram of the current detection device of the nuclear detector provided by the embodiment of the present application;

[0039] Figure 4 This is the schematic structural diagram of the electronic device provided by the embodiment of the present application. Detailed Embodiments

[0040] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application.

[0041] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] Accurate measurement in aspects such as nuclear materials, homeland security, environmental protection, and nuclear medicine is closely related to nuclear attribution and nuclear non-proliferation, and accurate measurement of nuclear non-proliferation depends on the discrimination of gamma-ray analysis with similar energies. In the related art, the detection technology of low-energy gamma nuclides with characteristic energies located on the Compton plateau cannot achieve accurate measurement with high accuracy and high resolution, making it difficult to detect the subtle differences between isotope compositions; while the low-energy gamma-ray detection technology of SQUID can solve the above problems and can expand the detection lower limit and improve the measurement ability of the radioactivity of low-energy gamma nuclides.

[0043] The detector chip of SQUID uses an Au:Er sensor as the absorber, and the pick-up coil in the chip has the functions of providing a magnetic field and picking up the induced current. Before the magnetocalorimeter works normally, a superconducting current needs to be injected into the pick-up coil by using a gold-palladium thermal switch so that the pick-up coil can provide a magnetic field and the magnetocalorimeter can work normally subsequently. However, after the current is injected, it is impossible to verify whether the current injection is successful.

[0044] Based on the above technical problems, the embodiments of the present application provide a current detection method, device, equipment, medium, and program product for a nuclear detector.

[0045] Figure 1 This is the current detection method for the nuclear detector provided by the embodiment of the present application, and the method may include the following steps:

[0046] Step 101: Adjust the temperature of the environment where the nuclear detector is located to a first temperature to control the detection component to switch to the superconducting state.

[0047] Among them, the pickup coil of the nuclear detector is pre-executed with a current injection operation; the detection component is electrically connected to both ends of the pickup coil.

[0048] In one embodiment, the nuclear detector can achieve high-accuracy and high-resolution detection of γ-rays radiated by isotopes of radioactive elements; exemplarily, the nuclear detector can include a SQUID.

[0049] Figure 2 This is the circuit structure schematic diagram of the pickup coil and the detection component of the nuclear detector provided by the embodiment of the present application. The detection component 201 can be a metal component, which can be electrically connected to the first coil 202 and the second coil 203 included in the pickup coil; and, as can be seen from the figure, both ends of the detection component 201 are electrically connected to one end of the first coil 202 and one end of the second coil 203 respectively.

[0050] In one embodiment, the current injection operation can inject a specified amplitude of current into the pickup coil through the input terminal 204.

[0051] In one embodiment, after the current injection operation is successfully executed, the pickup coil and the branch 205 can form a current loop. In this case, according to the relationship between the current intensity and the magnetic field, the flow of current in the current loop will generate a magnetic field, and the detection component in the superconducting state can conduct the change state of the magnetic flux corresponding to the above magnetic field.

[0052] In one embodiment, the first temperature can be different with different metal materials constituting the detection component.

[0053] In one embodiment, the temperature of the environment where the nuclear detector is located can be adjusted by a refrigeration device; exemplarily, at least the detection component and the pickup coil can be arranged on the cold plate of the cooler, and by adjusting the temperature of the cold plate, precise control of the temperature of the environment where the detection component is located can be achieved; exemplarily, the refrigeration device can include a cooler.

[0054] In one embodiment, the temperature of the environment during the execution of the current injection operation can be different from the first temperature.

[0055] Exemplarily, the surface of the detection component 201 can be covered with Au:Er. When the temperature of the environment changes from other temperatures to the first temperature, its material temperature can change accordingly. When the pickup coil is successfully injected with current, the change in its material temperature will cause the magnetic flux on one side of the pickup coil to change accordingly. Therefore, through the change state of the magnetic flux, it can be determined whether current is injected into the pickup coil.

[0056] Step 102: Detect the magnetic flux change state of the pick-up coil through a detection component in a superconducting state.

[0057] In one embodiment, if the current injection operation is successfully executed, that is, current is successfully injected into the pick-up coil, there is a constant current in the closed loop formed by the pick-up coil and the branch at this time. When the detection component is in a superconducting state, it can conduct the magnetic flux corresponding to the above constant current.

[0058] In one embodiment, the magnetic flux change state may include the change state of the magnetic flux corresponding to the above magnetic field per unit time.

[0059] In one embodiment, the magnetic flux change state may include the process of the magnetic field around the pick-up coil changing from nothing to something at the moment when the above current loop is established.

[0060] In one embodiment, the detection component can track, pick up, or capture the change state of the magnetic field or the magnetic flux corresponding to the magnetic field in real time, so as to obtain the magnetic flux change state.

[0061] Step 103: Based on the magnetic flux change state, detect whether the current injection operation has successfully injected current.

[0062] In one embodiment, detecting whether the current injection operation has successfully injected current can be achieved by any of the following methods:

[0063] If the magnetic flux change state indicates that the magnetic flux remains 0, it can be determined that the current injection operation fails, or the current injection operation fails to inject current into the pick-up coil.

[0064] If the magnetic flux change state indicates that the magnetic flux changes from 0 to a value greater than 0, it can be determined that the current injection operation is successful, or in other words, the current injection operation has successfully injected current into the pick-up coil.

[0065] As can be seen from the above, in the current detection method of the nuclear detector provided by the embodiments of the present application, the temperature of the environment where the nuclear detector is located is adjusted to the first temperature to control the detection component to switch to the superconducting state. The two ends of the pickup coil of the nuclear detector are electrically connected to the detection component, and the pickup coil is pre-performed with a current injection operation. Thus, through the above operations, the detection component in the superconducting state can conduct the magnetic flux change state corresponding to the current flow in the pickup coil without loss; and, when the current injection operation successfully injects current, by detecting the magnetic flux change state of the pickup coil through the detection component in the superconducting state, the loss of electrical energy corresponding to the current can be reduced, and the accuracy of detecting the magnetic flux change state can also be improved; on this basis, based on the magnetic flux change state, detecting whether the current injection operation successfully injects current can improve the accuracy of the above detection; in summary, the technical solution provided by the embodiments of the present application can flexibly detect whether current is injected into the pickup coil of the nuclear detector without modifying the device structure of the nuclear detector.

[0066] Based on the foregoing embodiments, the current detection method of the nuclear detector provided by the embodiments of the present application may further perform the following steps:

[0067] Step A1: Obtain a first mapping relationship.

[0068] Among them, the first mapping relationship includes the correspondence between the magnetic flux change amount and the current amplitude.

[0069] In one implementation, the first mapping relationship may include a one-to-one correspondence between multiple groups of magnetic flux change amounts and multiple groups of current amplitudes; exemplarily, the first mapping relationship may be embodied in the form of a table or a function; exemplarily, for the first mapping relationship in the form of a function, the current amplitude may be the independent variable, and the magnetic flux change amount may be the dependent variable.

[0070] In one implementation, the first mapping relationship may be determined in advance in the following manner:

[0071] In the ambient temperature corresponding to the first temperature, the correspondence between different injection currents and magnetic fluxes is measured respectively to obtain a first data set of multiple injection currents and magnetic fluxes, and then multiple first functions are obtained by fitting based on the first data set, and the multiple first functions are determined as the first mapping relationship; among them, the multiple first functions may include the process of the magnetic flux changing with the amplitude of the injection current at the first temperature, and the injection current may include the current injected into the pickup coil.

[0072] Step A2: Determine the first current amplitude of the current in the pickup coil based on the magnetic flux change state and the first mapping relationship.

[0073] Exemplarily, the induced current in the equivalent coil can be deduced from the change in magnetic flux. Therefore, when determining the magnetic flux corresponding to the magnetic flux change state of the pick-up coil, based on the above magnetic flux, the first current amplitude of the current in the pick-up coil can be deduced.

[0074] In one embodiment, the first current amplitude can be determined in the following manner:

[0075] According to the matching relationship between the first magnetic flux corresponding to the magnetic flux change state and the magnetic flux change amount in the mapping relationship, determine the target relationship from the mapping relationship, and determine the current amplitude in the target relationship as the first current amplitude; wherein, the magnetic flux change amount in the target relationship can be the same as the first magnetic flux.

[0076] In one embodiment, the first current amplitude can be greater than or equal to 0.

[0077] In one embodiment, if the first current amplitude is greater than 0, it can indicate that the current injection operation has successfully injected current. If the first current amplitude is equal to 0, it can indicate that the current injection operation has failed to inject current.

[0078] As can be seen from the above, in the current detection method of the nuclear detection device provided by the embodiments of the present application, after obtaining the first mapping relationship including the corresponding relationship between the magnetic flux change amount and the current amplitude, based on the magnetic flux change state and the first mapping relationship, determine the first current amplitude of the current in the pick-up coil. In this way, through the above operations, the flexible determination of the first current amplitude in the pick-up coil is realized, and the accuracy of the first current amplitude can also be improved; through the above steps, not only the accurate tracking of whether the current is successfully injected into the pick-up coil is realized, but also the fine-grained detection of the amplitude of the current injected into the pick-up coil can be realized.

[0079] Based on the foregoing embodiments, the current detection method of the nuclear detector provided by the embodiments of the present application can be realized by the detection component in the superconducting state detecting the magnetic flux change amount of the pick-up coil in the following manner:

[0080] During the process of adjusting the temperature of the environment from the first temperature to the second temperature, the detection component tracks and detects the magnetic flux change state.

[0081] In one embodiment, when the temperature of the environment switches to the second temperature, the detection component can still be in the superconducting state.

[0082] In one embodiment, the second temperature can be a single temperature or can include multiple different temperatures.

[0083] In one embodiment, the temperature adjustment range of the environment can be determined in advance according to the superconducting temperature range where the detection component is located, so as to increase the probability that the detection component remains in the superconducting state during the temperature adjustment of the environment.

[0084] In one embodiment, the temperature of the environment can be regulated by a refrigeration device.

[0085] In one embodiment, during the process of adjusting the temperature of the environment from the first temperature to the second temperature, continuously track and record the temperature change process and the magnetic flux corresponding to the magnetic flux change state at the corresponding temperature, and make a corresponding association between the above temperature change process and the change process of the magnetic flux corresponding to the temperature, so as to obtain the change process of the magnetic flux corresponding to the magnetic flux change state with respect to the temperature.

[0086] Exemplarily, the above method can also perform the following operations:

[0087] Step B1: Obtain the second mapping relationship.

[0088] Among them, the second mapping relationship includes the corresponding relationship between the magnetic flux change amount, the current amplitude and the temperature data.

[0089] In one embodiment, the second mapping relationship can include a one-to-one corresponding relationship between multiple sets of temperature data, multiple sets of magnetic flux change amounts and multiple sets of current amplitudes; Exemplarily, the second mapping relationship can be embodied in the form of a table or a function; Exemplarily, for the second mapping relationship in the form of a function, the current amplitude and the temperature data can be independent variables, while the magnetic flux change amount can be a dependent variable.

[0090] In one embodiment, the second mapping relationship can be determined in advance in the following manner:

[0091] Among multiple environmental temperatures, measure the corresponding relationship between different injection currents and magnetic fluxes multiple times to obtain a second data set of injection currents and magnetic fluxes, and then fit a second function based on the second data set and determine the second function as the second mapping relationship; Among them, the second function can include the process of the magnetic flux changing with the amplitude of the injection current under the condition of temperature data corresponding to multiple environmental temperatures, and the injection current can include the current injected into the pick-up coil.

[0092] Step B2: Determine the second current amplitude of the current in the pick-up coil based on the matching degree between the magnetic flux change state corresponding to the first temperature to the second temperature and the second mapping relationship.

[0093] In one embodiment, the second current amplitude can include multiple current amplitudes.

[0094] In one embodiment, the second current amplitude can be determined in the following manner:

[0095] Based on the magnetic flux change states corresponding to the first temperature and the second temperature, a set of data pairs including the relationship between temperature and magnetic flux is determined. Then, the set of data pairs is substituted into the second function represented by the second mapping relationship, and multiple current amplitudes corresponding to the first temperature to the second temperature are calculated through the second function, that is, the second current amplitude.

[0096] For example, when a superconducting current of 20 mA is successfully injected into the pick-up coil during the current injection operation, by adjusting the temperature of the cold plate of the refrigerator so that its temperature varies in the range of 15 mK to 80 mK, at this time, the magnetic flux change amount and temperature change detected by the detection component can be tracked and recorded. According to the above magnetic flux change amount and temperature change, combined with the second mapping relationship, the amplitude of the superconducting current injected into the pick-up coil, that is, the second current amplitude, can be determined; for another example, when a current of 30 mA is successfully injected into the pick-up coil during the current injection operation, the above operation can be repeated simultaneously, and the amplitude of the superconducting current injected into the pick-up coil can still be determined.

[0097] Exemplarily, when currents of different amplitudes are injected into the pick-up coil through the current injection operation, if the corresponding magnetic flux change amount and temperature change curves are all consistent with the second mapping relationship corresponding to the pre-fitted temperature, at this time, it can be determined that the current injection operation has successfully injected a superconducting current into the pick-up coil.

[0098] As can be seen from the above, in the current detection method of the nuclear detection device provided by the embodiments of the present application, during the process of adjusting the temperature of the environment from the first temperature to the second temperature, the detection component is used to track and detect the magnetic flux change amount, and the detection component is used to track and detect the magnetic flux change state. In this way, through the above operations, the joint tracking detection of the magnetic flux change amount and temperature under different environmental temperatures is realized; and, after obtaining the corresponding relationship between the magnetic flux change amount, current amplitude and temperature data, that is, the second mapping relationship, based on the matching degree between the magnetic flux change state corresponding to the first temperature to the second temperature and the second mapping relationship, the second current amplitude of the current in the pick-up coil is determined. In this way, through the above operations, the continuous, fine-grained and comprehensive tracking detection of the second current amplitude of the current injected into the pick-up coil under different environmental temperatures is realized.

[0099] Based on the foregoing embodiments, in the current detection method of the nuclear detector provided by the embodiments of the present application, the detection component includes an aluminum bonding wire and a Josephson junction.

[0100] Exemplarily, as Figure 2 shown, the Josephson junction 2011 is coupled to the aluminum bonding wire 2012, and both ends of the aluminum bonding wire 2012 are electrically connected to both ends of the first coil 202 and the second coil 203 respectively.

[0101] Accordingly, detecting the magnetic flux change state of the pickup coil by a detection component in a superconducting state can be achieved in the following manner:

[0102] Conduct the magnetic flux change state to the Josephson junction through an aluminum bonding wire in a superconducting state for the Josephson junction to detect the magnetic flux change state.

[0103] Exemplarily, the pickup coil and the SQUID input coil can be connected by a 25-μm aluminum bonding wire in a magnetic calorimeter, arranged on a Printed Circuit Board (PCB), and placed in a refrigeration device.

[0104] Exemplarily, after the magnetic calorimeter and the SQUID are placed in the refrigeration device, when performing a current injection operation to inject current into the pickup coil, by controlling the temperature of the refrigerator, the temperature of the pickup coil and the detection component reaches around 1K, so as to prompt the aluminum bonding wire to switch to the superconducting state. At this time, the magnetization intensity of the Au:Er material changes with the ambient temperature change, enabling the aluminum bonding wire to capture and conduct the magnetic flux change amount corresponding to the magnetization intensity to the Josephson junction.

[0105] When injecting currents of different magnitudes, the SQUID coil can detect different magnetic flux change states, and based on the magnetic flux change state, it can be determined whether the current has been successfully injected.

[0106] As can be seen from the above, in the current detection method of the nuclear detection device provided in the embodiments of the present application, the detection component includes an aluminum bonding wire and a Josephson junction, and the magnetic flux change state is conducted to the Josephson junction through the aluminum bonding wire in a superconducting state for the Josephson junction to detect the magnetic flux change state. Thus, by virtue of the advantages such as the stability and reliability of the Josephson junction in a low-temperature environment, flexible and accurate tracking detection of the magnetic flux change state can be achieved.

[0107] Based on the foregoing embodiments, in the current detection method of the nuclear detector provided in the embodiments of the present application, before adjusting the temperature of the nuclear detector to the first temperature, the following steps can also be performed:

[0108] Step C1: Adjust the temperature of the environment where the nuclear detector is located to the third temperature so that the pickup coil and the branch associated with the pickup coil switch to the superconducting state.

[0109] Wherein, the pickup coil and the branch are electrically connected to form a current loop.

[0110] In one implementation, the third temperature can change with the change of the material of the pickup coil; exemplarily, when the pickup coil is made of niobium (Nb) material, the third temperature can be 4K.

[0111] In one embodiment, the branch can also be composed of niobium (Nb) material. That is to say, at the third temperature, both the pick-up coil and the branch can be in a superconducting state. However, at this time, the inductance of the pick-up coil is greater than that of the branch. Therefore, it is impossible to inject current into the pick-up coil at this time.

[0112] Step C2: Adjust the branch from the superconducting state to the resistive state.

[0113] In one embodiment, the branch can be switched from the superconducting state to the resistive state by adjusting the ambient temperature of the branch.

[0114] Step C3: Inject current through the input terminal electrically connected to the pick-up coil and the branch to perform the current injection operation.

[0115] In one embodiment, after the branch is switched to the resistive state, current can be injected through the input terminal 204 to perform the current injection operation. Exemplarily, since the pick-up coil is in a superconducting state when the current injection operation is performed, the current injected at this time can be a superconducting current.

[0116] Exemplarily, after the superconducting current is injected, the ambient temperature can be adjusted to the first temperature by a refrigeration device, so that the detection component is switched to the superconducting state, and the detection component in the superconducting state can conduct the magnetic flux or the magnetic flux change state of the pick-up coil.

[0117] As can be seen from the above, in the current detection method of the nuclear detection device provided by the embodiments of the present application, before the ambient temperature is adjusted to the first temperature, the temperature of the environment where the nuclear detector is located is adjusted to the third temperature, so that the pick-up coil and its associated branch are switched to the superconducting state, and the pick-up coil and the branch are electrically connected to form a current loop, and the branch is adjusted from the superconducting state to the resistive state. At this time, current is injected through the input terminal electrically connected to the pick-up coil and the branch to perform the current injection operation. In this way, the probability of successful execution of the current injection operation is improved through the above operations.

[0118] Based on the foregoing embodiments, in the current detection method of the nuclear detector provided by the embodiments of the present application, the branch can be adjusted from the superconducting state to the resistive state in the following manner:

[0119] Inject a heating current into the heating resistor included in the branch to trigger the heating resistor to heat the branch, so that the branch is switched from the superconducting state to the resistive state.

[0120] As Figure 2 shown, the heating resistor can be associated with the branch 205. At this time, by injecting a heating current into the heating resistor, the heating resistor is triggered to generate heat, thereby increasing the temperature of the branch, and further enabling the branch to be switched from the superconducting state to the resistive state.

[0121] As can be seen from the above, in the current detection method of the nuclear detection device provided by the embodiments of the present application, a heating current is injected into the heating resistor included in the branch to trigger the heating resistor to heat the branch, so that the branch switches from the superconducting state to the resistive state. In this way, through the above operations, flexible control of the branch switching from the superconducting state to the resistive state is achieved.

[0122] Based on the foregoing embodiments, in the current detection method of the nuclear detector provided by the embodiments of the present application, after injecting current through the input end electrically connected to the pick-up coil and the branch, the following operations can also be performed:

[0123] Adjust the branch from the resistive state to the superconducting state.

[0124] In one implementation manner, the injection of the heating current into the heating resistor can be stopped to stop the heating operation of the branch, so that the branch switches from the resistive state to the superconducting state.

[0125] In one implementation manner, in the case of stopping the heating operation of the branch, due to the continuous refrigeration operation of the refrigeration device, the branch can gradually switch from the resistive state to the superconducting state. At this time, the pick-up coil and the branch can form a superconducting loop, so that the superconducting constant current corresponding to the current injected by the current injection operation is enclosed in the above superconducting loop.

[0126] After the current injection is completed, due to its low-temperature superconducting characteristics, it is impossible to determine whether the superconducting current has been successfully injected into the pick-up coil by the solutions provided in the related technologies. At this time, the method provided by the embodiments of the present application can be used to confirm the injection state of the current.

[0127] As can be seen from the above, in the current detection method of the nuclear detection device provided by the embodiments of the present application, after performing the current injection operation, the branch is adjusted from the resistive state to the superconducting state. In this way, through the above method, flexible switching of the conductive state of the branch is achieved.

[0128] It should be noted that as a reference solution, through the technical solution provided by the embodiments of the present application, it is possible to determine whether the current injection operation is successful, so that the subsequent experimental links can continue to be carried out; and, during the working process of the magnetic calorimeter, there are many factors affecting whether it can read the spectral signal. In the embodiments of the present application, one of the influencing factors can be determined in advance to increase the probability of the normal and stable operation of the magnetic calorimeter.

[0129] Meanwhile, since the magnetic calorimeter operates in the mK temperature range, the time cost for each single temperature rise and fall is extremely high. For example, the temperature adjustment time can reach one week. In this case, if it is impossible to determine whether the current injection operation is successful, the subsequent experimental procedures cannot be carried out, which will consume a large amount of personnel and time costs. After determining the current injection situation through this method, the probability of the normal operation of the magnetic calorimeter and the stability of its performance can be improved, enabling the subsequent energy spectrum readout and signal analysis to proceed normally, thus providing guarantee for the stability and reliability of the subsequent ray detection results.

[0130] Based on the foregoing embodiments, the embodiments of the present application further provide a current detection device for a nuclear detector. Figure 3 It is a schematic structural diagram of the current detection device for the nuclear detector provided by the embodiments of the present application. As Figure 3 shown, the current detection device 3 of the nuclear detector may include:

[0131] An adjustment module 301, configured to adjust the temperature of the environment where the nuclear detector is located to a first temperature to control the detection component to switch to the superconducting state; wherein, a current injection operation is pre-executed on the pickup coil of the nuclear detector; the detection component is electrically connected to both ends of the pickup coil;

[0132] A detection module 302, configured to detect the magnetic flux change state of the pickup coil through the detection component in the superconducting state; based on the magnetic flux change state, detect whether the current injection operation successfully injects current.

[0133] In some embodiments, the detection module 302 is configured to obtain a first mapping relationship; wherein, the first mapping relationship includes the correspondence between the magnetic flux change amount and the current amplitude;

[0134] The detection module 302 is further configured to determine a first current amplitude of the current in the pickup coil based on the magnetic flux change state and the first mapping relationship.

[0135] In some embodiments, the detection module 302 is configured to track and detect the magnetic flux change state through the detection component during the process of adjusting the temperature of the environment from the first temperature to the second temperature;

[0136] The detection module 302 is further configured to obtain a second mapping relationship, and determine a second current amplitude of the current in the pickup coil based on the magnetic flux change state corresponding to the first temperature to the second temperature and the second mapping relationship; wherein, the second mapping relationship includes the correspondence between the magnetic flux change amount, the current amplitude and the temperature data.

[0137] In some embodiments, the detection component includes an aluminum bonding wire and a Josephson junction; the detection module 302 is configured to conduct the magnetic flux change state to the Josephson junction through the aluminum bonding wire in the superconducting state for the Josephson junction to detect the magnetic flux change state.

[0138] In some embodiments, an adjustment module 301 is configured to adjust the temperature of the environment where the nuclear detector is located to a third temperature, so that the pick-up coil and the branch associated with the pick-up coil are switched to the superconducting state; wherein, the pick-up coil and the branch are electrically connected to form a current loop.

[0139] The adjustment module 301 is further configured to adjust the branch from the superconducting state to the resistive state.

[0140] The above current detection device further includes a current injection module, configured to inject a current through the input terminal electrically connected to the pick-up coil and the branch to perform a current injection operation.

[0141] In some embodiments, the current injection module is configured to inject a heating current into the heating resistor included in the branch to trigger the heating resistor to heat the branch, so that the branch is switched from the superconducting state to the resistive state.

[0142] In some embodiments, the adjustment module 301 is configured to adjust the branch from the resistive state to the superconducting state.

[0143] Based on the foregoing embodiments, an embodiment of the present application further provides an electronic device. Figure 4 FIG. is a schematic structural diagram of the electronic device provided by the embodiment of the present application. As Figure 4 shown, the electronic device 4 includes a processor 401 and a memory 402; a computer program is stored in the memory 402; when the computer program is executed by the processor 401, it can implement the current detection method of the nuclear detector as described in any of the previous ones.

[0144] Based on the foregoing embodiments, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored; when the computer program is executed by the processor of the electronic device, it can implement the current detection method of the nuclear detector as described in any of the previous ones.

[0145] Based on the foregoing embodiments, an embodiment of the present application further provides a computer program product, in which a computer program is stored; when the computer program is executed by the processor of the electronic device, it can implement the current detection method of the nuclear detector as described in the previous one.

[0146] The descriptions of the above embodiments tend to emphasize the differences between the embodiments. The same or similar parts can be referred to each other. For the sake of brevity, they will not be repeated herein.

[0147] The methods disclosed in the method embodiments provided by the present application can be arbitrarily combined without conflict to obtain new method embodiments.

[0148] The features disclosed in each product embodiment provided by this application can be arbitrarily combined without conflict to obtain a new product embodiment.

[0149] The features disclosed in each method or device embodiment provided by this application can be arbitrarily combined without conflict to obtain a new method embodiment or device embodiment.

[0150] It should be noted that the above computer-readable storage medium can be a read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), ferromagnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disc, or compact disc read-only memory (CD-ROM), etc.; it can also be various electronic devices including one or any combination of the above memories, such as mobile phones, computers, tablet devices, personal digital assistants, etc.

[0151] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including that element.

[0152] The serial numbers of the embodiments of this application above are only for description and do not represent the superiority or inferiority of the embodiments.

[0153] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus necessary general hardware nodes. Of course, they can also be implemented by hardware, but in many cases, the former is a better implementation. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of the present application.

[0154] This application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0155] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means implements the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0156] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0157] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application accordingly. Any equivalent structural or equivalent process transformation made by using the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A current detection method for a nuclear detector, characterized in that: The method comprises: The temperature of the environment in which the nuclear detector is located is adjusted to a first temperature to control the detection component to switch to a superconducting state; wherein the pickup coil of the nuclear detector is preliminarily subjected to a current injection operation; and the detection component is electrically connected to both ends of the pickup coil; Detecting the magnetic flux change state of the pickup coil by a detection component in a superconducting state; Based on the magnetic flux change state, it is detected whether the current injection operation successfully injects current.

2. The method according to claim 1, characterized in that The method comprises: Acquire a first mapping relationship; wherein the first mapping relationship includes a corresponding relationship between a magnetic flux change amount and a current amplitude; Based on the magnetic flux change state and the first mapping relationship, a first current amplitude of the current in the pickup coil is determined.

3. The method according to claim 1, characterized in that The method of detecting the magnetic flux change state of the pickup coil by using a detection component in a superconducting state comprises: In the process of adjusting the temperature of the environment from the first temperature to the second temperature, tracking and detecting the change state of the magnetic flux by the detection component; The method further comprises: Acquire a second mapping relationship, wherein the second mapping relationship includes a correspondence between a magnetic flux change, a current amplitude, and temperature data; A second current amplitude of the current in the pickup coil is determined based on the magnetic flux change state corresponding to the first temperature to the second temperature and the second mapping relationship.

4. The method according to any one of claims 1 to 3, characterized in that: The detection component includes an aluminum bonding wire and a Josephson junction; the detection of the magnetic flux change state of the pickup coil by the detection component in a superconducting state includes: The magnetic flux change state is conducted to the Josephson junction through the aluminum bonding wire in a superconducting state, so that the Josephson junction detects the magnetic flux change state.

5. The method according to any one of claims 1 to 3, characterized in that: Before adjusting the temperature of the environment in which the nuclear detector is located to the first temperature, the method further includes: The temperature of the environment in which the nuclear detector is located is adjusted to a third temperature, so that the pickup coil and the branch associated with the pickup coil are switched to a superconducting state; wherein the pickup coil and the branch are electrically connected to form a current loop; Adjusting the branch from a superconducting state to a resistive state; The current injection operation is performed by injecting current through the pickup coil and the input end electrically connected to the branch.

6. The method according to claim 5, characterized in that The step of adjusting the branch from a superconducting state to a resistive state comprises: A heating current is injected into a heating resistor included in the branch to trigger the heating resistor to heat the branch, so that the branch switches from the superconducting state to the resistive state.

7. The method according to claim 6, characterized in that After injecting current through the pickup coil and the input end electrically connected to the branch, the method further includes: The branch is adjusted from the resistive state to a superconducting state.

8. A current detection device for a nuclear detector, characterized in that: The current detection device of the nuclear detector comprises: An adjustment module, used for adjusting the temperature of the environment in which the nuclear detector is located to a first temperature, so as to control the detection component to switch to a superconducting state; wherein the pickup coil of the nuclear detector is preliminarily subjected to a current injection operation; and the detection component is electrically connected to both ends of the pickup coil; The detection module is used to detect the magnetic flux change state of the pickup coil through a detection component in a superconducting state; based on the magnetic flux change state, detect whether the current injection operation successfully injects current.

9. An electronic device, characterized in that: The electronic device includes a processor and a memory; a computer program is stored in the memory; when the computer program is executed by the processor, it can implement the current detection method of the nuclear detector as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program; when the computer program is executed by a processor of an electronic device, it can implement the current detection method of the nuclear detector as described in any one of claims 1 to 7.

11. A computer program product, characterized in that The program product stores a computer program; when the computer program is executed by a processor of an electronic device, it can implement the current detection method of the nuclear detector as described in any one of claims 1 to 7.

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