Method for obtaining target thickness of hydrogen-embrittlement resistant layer of neutron source target, terminal and medium

Abstract

The present disclosure provides a method for obtaining a target thickness of a hydrogen-embrittlement resistant layer of a neutron source target, a terminal and a medium.SOLUTION: Performing, by a physical field fitting method, a deposition distribution-based hydrogen diffusivity fitting and an energy distribution-based thermal performance fitting, respectively, for a target comprising a hydrogen embrittlement resistant layer; Obtaining a hydrogen atom concentration distribution characteristic corresponding to the current thickness and a temperature distribution characteristic corresponding to the current thickness, detecting whether the hydrogen atom concentration distribution characteristic satisfies a predetermined condition of a hydrogen atom concentration field, and detecting whether the temperature distribution characteristic satisfies a predetermined condition of a temperature field, and if both are satisfied, using the current thickness of the hydrogen-embrittlement resistant layer as the target thickness of the hydrogen-embrittlement resistant layer. According to the present invention, it is possible to quickly and easily obtain the target thickness of the hydrogen-embrittlement resistant layer that matches the physical field performance of other layers in the target, thereby improving the hydrogen-embrittlement resistant performance of the target and effectively improving the overall performance of the target.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to the technical field of hydrogen measurement, and in particular to a method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target, a terminal, and a computer storage medium. [Background technology]

[0002] In order to reduce the accumulation of hydrogen atoms in the target substrate and suppress the occurrence of hydrogen embrittlement, a hydrogen embrittlement-resistant layer is added between the working layer of the neutron source target and the target substrate. The design of the thickness of the hydrogen embrittlement-resistant layer directly affects the hydrogen embrittlement resistance of the target, thereby affecting the degradation rate and service life of the target.

[0003] Typically, in the conventional process for selecting the thickness of a hydrogen embrittlement-resistant layer, the material of the hydrogen embrittlement-resistant layer is first determined based on the material of the target's working layer and the threshold energy of reaction. After selecting the material of the hydrogen embrittlement-resistant layer, the hydrogen diffusibility analysis of the hydrogen embrittlement-resistant layer is often performed alone, and the thickness of the hydrogen embrittlement-resistant layer is determined based on the results of the hydrogen diffusibility analysis. However, when a low-melting-point working layer material (e.g., lithium with a low melting point (180°C)) is used for the target's working layer, determining the thickness of the hydrogen embrittlement-resistant layer based solely on the hydrogen diffusibility analysis often results in an excessively thick hydrogen embrittlement-resistant layer. In this case, the heat dissipation ability of the hydrogen embrittlement-resistant layer decreases, causing the surface temperature to rise, which leads to melting of the target's working layer material and thus jeopardizing operational safety. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the drawbacks of the above-mentioned prior art, an object of the present invention is to provide a method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target, a terminal, and a computer storage medium, in order to solve the problem that the thickness design of the hydrogen embrittlement-resistant layer in the conventional method was not very rational because of insufficient consideration of the deposition distribution characteristics and energy distribution of protons in the hydrogen embrittlement-resistant layer. [Means for solving the problem]

[0005] To achieve the above and other related objects, in a first aspect, the present invention provides a method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target. The target includes an operating layer, a hydrogen embrittlement-resistant layer, and a target substrate. The method includes: determining a current thickness of the hydrogen embrittlement-resistant layer, determining that the current thickness is equal to or greater than a reference thickness of the hydrogen embrittlement-resistant layer; performing a hydrogen diffusivity fitting based on a deposition distribution and a thermal performance fitting based on an energy distribution on the target using a physical field fitting method to obtain a hydrogen atom concentration distribution characteristic and a corresponding temperature distribution characteristic corresponding to the current thickness; determining whether the hydrogen atom concentration distribution characteristic satisfies a predetermined condition for the hydrogen atom concentration field and whether the temperature distribution characteristic satisfies a predetermined condition for the temperature field; and, if both conditions are satisfied, determining the current thickness as the target thickness of the hydrogen embrittlement-resistant layer. The reference thickness is determined based on the material and thickness of the operating layer, by combining the magnitude of the energy of the incident proton beam on the target and the current material of the hydrogen embrittlement-resistant layer.

[0006] In one embodiment of the present invention, the method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target further includes, if any of the conditions is not satisfied, updating the current thickness based on a predetermined adjustment threshold and executing the method for obtaining a target thickness of a hydrogen embrittlement-resistant layer again based on the new current thickness until the target thickness is obtained.

[0007] In one embodiment of the present invention, a method for performing hydrogen diffusivity fitting based on deposition distribution for a target using the above-mentioned physical field fitting method includes converting the proton beam intensity into a molar flow rate of the corresponding hydrogen atoms, obtaining a hydrogen atom concentration distribution along the incident direction of the target and a hydrogen atom concentration distribution along the reference plane using the physical field fitting method based on the molar flow rate of the hydrogen atoms, and extracting the maximum hydrogen atom concentration from the hydrogen atom distribution corresponding to the target.

[0008] In one embodiment of the present invention, in order to obtain the hydrogen atom concentration distribution of a proton beam in three-dimensional space, the method for obtaining the hydrogen atom concentration distribution along the incident direction of a target using the above-mentioned physical field fitting method includes calculating the hydrogen atom concentration distribution along the incident direction of the proton beam on the target using a Monte Carlo method, and / or the method for obtaining the hydrogen atom concentration distribution along the reference plane of a target using the above-mentioned physical field fitting method includes calculating the hydrogen atom concentration distribution along the reference plane of the proton beam using a finite element simulation method.

[0009] In one embodiment of the present invention, the hydrogen atom concentration distribution of the proton beam in three-dimensional space is as follows:

number

[0010] f in the formula sc (x, y, z) is the hydrogen atom concentration distribution of the proton beam in three-dimensional space, x and y are the coordinates of the proton beam on the reference plane, z is the coordinate of the proton beam in the incident direction, and σ is the standard deviation of the Gaussian distribution on the plane.

[0011] In one embodiment of the present invention, the implementation method for performing thermal performance fitting based on the energy distribution for a target using the above-mentioned physical field fitting method includes converting the power of a proton beam into a heat source power corresponding to the target, and using the physical field fitting method to obtain the temperature distribution along the incident direction of the target and the temperature distribution along the reference plane based on the heat source power, and extracting the maximum temperature from the temperature distribution corresponding to the target.

[0012] In one embodiment of the present invention, in order to obtain the temperature distribution of a proton beam in three-dimensional space, the method for obtaining the temperature distribution along the incident direction of a target using the above-mentioned physical field fitting method includes calculating the temperature distribution along the incident direction of the proton beam on the target using a Monte Carlo method, and / or the method for obtaining the temperature distribution along the reference plane of a target using the above-mentioned physical field fitting method includes calculating the temperature distribution along the reference plane of the proton beam using a finite element simulation method.

[0013] In one embodiment of the present invention, the temperature distribution of the proton beam in three-dimensional space is as follows:

number

[0014] f in the formula nl (x,y,z) is the temperature distribution of the proton beam in three-dimensional space, and f nl (z) is the temperature distribution along the incident direction of the proton beam, x and y are the coordinates of the proton beam on the reference plane, z is the coordinate of the proton beam in the incident direction, and σ is the standard deviation of the Gaussian distribution on the plane.

[0015] In one embodiment of the present invention, the method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target further includes performing a neutron yield performance evaluation on a target including a hydrogen embrittlement-resistant layer of the target thickness, thereby obtaining a target thickness that satisfies neutron yield performance evaluation conditions.

[0016] To achieve the above and other related objects, in a second aspect, the present invention further provides a method for designing a hydrogen embrittlement-resistant layer of a neutron source target. The target includes an operating layer, a hydrogen embrittlement-resistant layer, and a target substrate. The method includes: determining a current material of the hydrogen embrittlement-resistant layer, the current material having a hydrogen diffusion coefficient greater than that of the target substrate; determining a reference thickness of the hydrogen embrittlement-resistant layer corresponding to the current material based on the material and thickness of the operating layer by combining the energy of the incident proton beam on the target and the current material of the hydrogen embrittlement-resistant layer; obtaining a target thickness of the hydrogen embrittlement-resistant layer based on the reference thickness using any of the above-described methods for obtaining a target thickness of the hydrogen embrittlement-resistant layer; detecting, based on the target thickness of the hydrogen embrittlement-resistant layer, whether the neutron yield distribution of the target corresponding to the target thickness satisfies a predetermined neutron yield condition; and, if so, determining the target thickness as the target thickness corresponding to the current material by combining the current material and the target thickness corresponding to the current material.

[0017] In one embodiment of the present invention, detecting whether the neutron yield distribution of the target corresponding to the target thickness satisfies a predetermined condition for neutron yield includes constructing a simulation model for simulating perpendicular collision of a proton beam with the target based on the target corresponding to the target thickness, the simulation model being a spherical coordinate system centered on the target, extracting the neutron yield of the target within a predetermined radiation range in the proton emission direction in the simulation model, detecting whether the neutron yield satisfies a yield threshold, and if so, determining that the neutron yield of the target corresponding to the target thickness satisfies the predetermined neutron yield requirement.

[0018] To achieve the above and other related objects, the present invention further provides a terminal including a processor and a memory, the memory being adapted to store a computer program, the processor being adapted to execute the computer program stored in the memory to cause the terminal to perform any of the above-described methods for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target or any of the above-described methods for designing a hydrogen embrittlement-resistant layer of a neutron source target.

[0019] The present invention also provides a computer storage medium having a computer program stored therein, which, when executed by a processor, realizes any of the above-described methods for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target or any of the above-described methods for designing a hydrogen embrittlement-resistant layer of a neutron source target. [Effects of the Invention]

[0020] As described above, the method, terminal, and computer storage medium for obtaining a target thickness of a hydrogen embrittlement-resistant layer in a neutron source target provided by the present invention perform a hydrogen diffusivity evaluation and a comprehensive thermal performance evaluation for a target including a hydrogen embrittlement-resistant layer, and obtain a target thickness that satisfies predetermined conditions for the hydrogen atom concentration field and predetermined conditions for the temperature field based on the evaluation results. This makes it possible to quickly and easily obtain a target thickness of the hydrogen embrittlement-resistant layer that is compatible with the physical field performance of other structural layers (e.g., working layers) in the target, thereby improving the hydrogen resistance performance of the target and effectively improving the overall performance of the target. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 shows a schematic structural diagram of the neutron source target described in the present invention. [Figure 2] FIG. 2 is a schematic flowchart of one embodiment of the method for obtaining the target thickness of the hydrogen embrittlement-resistant layer of the neutron source target provided by the present invention. [Figure 3]FIG. 3 shows a schematic flowchart of one embodiment of step S200 of the present invention. [Figure 4] FIG. 4 shows a schematic flowchart of another embodiment of step S200 of the present invention. [Figure 5] FIG. 5 shows a schematic flow chart of one embodiment of performing hydrogen diffusivity fitting based on deposition distribution for a target corresponding to the current thickness described in the present invention to obtain the corresponding hydrogen atom concentration distribution characteristics. [Figure 6] FIG. 6 shows a schematic flow chart of an embodiment of a method for obtaining the corresponding temperature distribution characteristics by performing thermal performance fitting based on the energy distribution for a target corresponding to the current thickness described in the present invention. [Figure 7] FIG. 7 is a schematic flowchart of another embodiment of the method for obtaining a target thickness of the hydrogen embrittlement-resistant layer of the neutron source target according to the present invention. [Figure 8] FIG. 8 shows a schematic diagram of a coordinate system in which a simulation model in this application in which a proton beam impinges perpendicularly on a target is located. [Figure 9] FIG. 9 shows a schematic flowchart of yet another embodiment of the method for obtaining a target thickness of the hydrogen embrittlement-resistant layer of the neutron source target according to the present invention. [Figure 10] FIG. 10 shows a schematic flow chart of one embodiment of the method for designing a hydrogen embrittlement resistant layer of a neutron source target described in the present invention. [Figure 11] FIG. 11 shows a schematic flow chart of another embodiment of the method for designing a hydrogen embrittlement resistant layer of a neutron source target according to the present invention. [Figure 12] FIG. 12 shows a schematic structural diagram of one embodiment of the terminal described in this application. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments of the present invention will be described with reference to specific examples. Those skilled in the art will readily understand other advantages and effects of the present invention from the disclosure herein. The present invention can also be implemented or applied in other different specific embodiments. Furthermore, various supplements or modifications can be made to the details of the present specification based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following examples and features of the examples may be combined with each other unless a contradiction arises.

[0023] It should be noted that the drawings presented in the following examples are merely for the purpose of roughly describing the basic concept of the present invention. The drawings show only components relevant to the present invention, but are not based on the number, shape, and size of the components when actually implemented. The shape, number, and ratio of each component when actually implemented can be arbitrarily changed, and the layout of the components may become more complicated.

[0024] In the prior art, the process of selecting the thickness of a hydrogen embrittlement-resistant layer lacked sufficient consideration of the deposition distribution characteristics of hydrogen atom concentration in a target including the hydrogen embrittlement-resistant layer and the energy distribution of the target, resulting in an unreasonable design of the hydrogen embrittlement-resistant layer. In contrast, the present invention provides a method for obtaining a target thickness of a hydrogen embrittlement-resistant layer for a neutron source target, a terminal, and a computer storage medium. The method, terminal, and computer storage medium perform a hydrogen diffusivity evaluation based on the deposition distribution and a thermal diffusivity evaluation based on the energy distribution for a target including a hydrogen embrittlement-resistant layer, and then determine whether the current thickness of the hydrogen embrittlement-resistant layer is the target thickness based on the results of both the hydrogen diffusivity and thermal diffusivity evaluations. This ensures that the hydrogen embrittlement-resistant layer corresponding to the target thickness is compatible with the physical field performance of other structural layers (e.g., functional layers) in the target.

[0025] The target thickness is the thickness of the hydrogen embrittlement resistant layer that simultaneously satisfies at least the predetermined conditions of the concentration field of hydrogen atoms and the predetermined conditions of the temperature field.

[0026] Please refer to FIG. 1, which shows a schematic structural diagram of one embodiment of the neutron source target provided by the present invention. As shown in FIG. 1, the target includes an operating layer 100, a hydrogen embrittlement-resistant layer 200, and a target substrate 300. The layers are arranged in a stacked manner to constitute the target. The operating layer 100 is provided on the proton incident side and is used to generate neutrons by the action of a proton beam. The target substrate is used to support the operating layer 100 and the hydrogen embrittlement-resistant layer 200. The hydrogen embrittlement-resistant layer 200 is provided between the operating layer 100 and the target substrate 300.

[0027] The proton beam is incident on the target along the incident direction. Some of the protons with high energy undergo nuclear reactions in the action layer 100 to generate neutrons, while the remaining protons are decelerated as they pass through the hydrogen embrittlement-resistant layer 200 and remain there. Due to the Bragg peak effect, most of the decelerated protons are eventually distributed in the hydrogen accumulation layer 400 at the end of the irradiation distance.

[0028] In a specific embodiment, the hydrogen embrittlement resistant layer is welded between the working layer and the target substrate.

[0029] It should be noted that the hydrogen embrittlement resistant layer in the present application is a material layer having a hydrogen diffusion coefficient greater than that of the target substrate material, and is used to improve the hydrogen embrittlement resistance of the target by accommodating hydrogen atoms in the reaction process of the neutron source. Examples of materials for the hydrogen embrittlement resistant layer include, but are not limited to, tantalum (Ta), vanadium (V), and niobium (Nb).

[0030] In order to improve the accuracy of obtaining the target thickness corresponding to the hydrogen embrittlement-resistant layer and make the hydrogen embrittlement-resistant layer of the target thickness more adaptable to the design of other structural layers (e.g., functional layers) in the target, the method for obtaining the target thickness of the hydrogen embrittlement-resistant layer of a neutron source target provided in a first aspect of the present application is used to obtain the target thickness of the hydrogen embrittlement-resistant layer in the target target.

[0031] 2, which is a schematic flow chart illustrating an embodiment of the method for obtaining a target thickness of the hydrogen embrittlement-resistant layer of the neutron source target provided by the present invention. As shown in FIG. 2, the method includes the following steps:

[0032] S100: Obtain the reference thickness of the hydrogen embrittlement resistant layer.

[0033] After the material of the hydrogen embrittlement resistant layer is determined, a reference thickness corresponding to the material of the hydrogen embrittlement resistant layer is determined.

[0034] The reference thickness is determined based on the material and thickness of the working layer, the energy of the incident proton beam at the target, and the current material of the hydrogen embrittlement-resistant layer, and the reference thickness of the hydrogen embrittlement-resistant layer corresponding to the current material is then determined. That is, the reference thickness is determined based on the threshold energy of the reaction between the incident protons and the material of the working layer (at which a nuclear reaction of neutrons occurs). The threshold energy is the energy at which the incident protons pass through the working layer and penetrate into the hydrogen embrittlement-resistant layer.

[0035] The thickness value determined based on the energy of the incident protons penetrating the hydrogen embrittlement resistant layer is used to ensure that the protons remain in the hydrogen embrittlement resistant layer without being implanted into the target substrate. The energy of the incident protons is the threshold energy at which the protons react with the material of the working layer. The protons penetrate the hydrogen embrittlement resistant layer based on the energy.

[0036] For example, if the material of the hydrogen embrittlement-resistant layer is tantalum and the energy of the incident protons is 1.88 MeV, the reference thickness of the hydrogen embrittlement-resistant layer is 20 μm. That is, if the thickness of the hydrogen embrittlement-resistant layer is greater than 20 μm, the protons will remain in the hydrogen embrittlement-resistant layer without being implanted into the target substrate. Therefore, all of the candidate thicknesses described below will be greater than 20 μm.

[0037] S200: Based on the reference thickness of the hydrogen embrittlement resistant layer, a hydrogen diffusivity evaluation based on deposition distribution and a thermal diffusivity evaluation based on energy distribution are performed on a target including the hydrogen embrittlement resistant layer, thereby obtaining a target thickness that simultaneously satisfies the hydrogen diffusibility evaluation conditions and the thermal performance evaluation conditions.

[0038] The hydrogen diffusivity is a physical field performance that indicates the diffusion capacity of hydrogen atoms, and the thermal diffusivity is a physical field performance that indicates the diffusion capacity of temperature.

[0039] In this embodiment, the hydrogen diffusivity evaluation based on the deposition distribution is performed using a concentration distribution evaluation based on hydrogen atom concentration distribution characteristics, and the thermal diffusivity evaluation based on the energy distribution is performed using a temperature distribution evaluation based on temperature distribution characteristics.

[0040] To achieve accurate target thickness selection, in some optional embodiments, performing step S200 includes, as shown in FIG.

[0041] S201: The current thickness of the hydrogen embrittlement resistant layer is obtained.

[0042] The current thickness is equal to or greater than the reference thickness of the hydrogen embrittlement resistant layer.

[0043] It should be noted that the first time this step is performed, the current thickness is approximately greater than or equal to the thickness value of the reference thickness.

[0044] S202: Using the physical field fitting method, for the target corresponding to the current thickness, hydrogen diffusivity fitting based on the deposition distribution and thermal performance fitting based on the energy distribution are performed to obtain the corresponding hydrogen atom concentration distribution characteristics and the corresponding temperature distribution characteristics.

[0045] The target corresponding to the current thickness is a target structure including a hydrogen embrittlement resistant layer of the current thickness, that is, a structure including at least a working layer, a hydrogen embrittlement resistant layer, and a target substrate.

[0046] S203: It is determined whether the hydrogen atom concentration distribution characteristic satisfies a predetermined condition for the hydrogen atom concentration field, and it is also determined whether the temperature distribution characteristic satisfies a predetermined condition for the temperature field.

[0047] S204A: If both conditions are met, the current thickness is set to the target thickness.

[0048] S204B: If at least one of the conditions is not met, the current thickness is updated based on a predetermined adjustment threshold, and the above steps S202 to S204 (S204A or S204B) are executed again based on the new current thickness.

[0049] The adjustment threshold corresponds to a predetermined thickness adjustment range for the hydrogen embrittlement resistant layer, i.e., the larger the thickness adjustment range, the larger the adjustment threshold, and vice versa.

[0050] It should be noted that the adjustment threshold is a predetermined thickness adjustment amount, and the thickness adjustment amount must be set to satisfy the evaluation index of hydrogen diffusibility and the evaluation index of thermal performance. Regarding hydrogen diffusibility, the adjustment threshold is set to the hydrogen embrittlement limit of the hydrogen embrittlement resistant material (for example, Ta is 9.2 × 10 3 mol / m 3 , V is 3.5 × 10 4 mol / m 3 ) requirements must be met. For thermal performance, the tuning threshold refers to a target temperature requirement, such as the melting point requirement of the working layer.

[0051] The thickness adjustment range refers to the thickness range of the hydrogen embrittlement prevention layer that is preset at the time of initial design, and is illustratively 20 to 30 microns.

[0052] To improve the efficiency of obtaining the target thickness, in an optional embodiment, performing step S200 includes, as shown in FIG.

[0053] S210: Select several different candidate thicknesses for the hydrogen embrittlement resistant layer, and select one thickness from each candidate thickness as the current thickness.

[0054] All of the candidate thicknesses are equal to or greater than the reference thickness of the hydrogen embrittlement resistant layer.

[0055] Specifically, after obtaining the reference thickness of the hydrogen embrittlement resistant layer, several thicknesses are randomly selected within a range of candidate thicknesses as the candidate thicknesses of the hydrogen embrittlement resistant layer, the range of candidate thicknesses being equal to or greater than the numerical range of the reference thickness.

[0056] S220: Using the physical field fitting method, for the target corresponding to the current thickness, hydrogen diffusivity fitting based on the deposition distribution and thermal performance fitting based on the energy distribution are performed to obtain the corresponding hydrogen atom concentration distribution characteristics and the corresponding temperature distribution characteristics.

[0057] S230: It is determined whether the hydrogen atom concentration distribution characteristic satisfies a predetermined condition of the hydrogen atom concentration field, and it is also determined whether the temperature distribution characteristic satisfies a predetermined condition of the temperature field.

[0058] S240A: If both conditions are met, the current thickness is set to the target thickness.

[0059] S240B: If at least one of the two is not satisfied, a new thickness is selected from the candidate thicknesses as the new current thickness, and the above steps S230 to S240 (S240A or S240B) are executed again based on the new current thickness.

[0060] It should be noted that in some embodiments, the above steps S230 to S240 may be performed in parallel, i.e., for each candidate thickness, the above steps S230 to S240 may be performed simultaneously to quickly obtain a detection result of whether each candidate thickness is the target thickness.

[0061] In a specific embodiment, the hydrogen atom concentration distribution characteristic is a maximum hydrogen atom concentration, the temperature distribution characteristic is a maximum temperature, and when it is detected that the maximum hydrogen atom concentration is greater than a hydrogen atom concentration threshold and the maximum temperature is greater than a temperature threshold, the current thickness is set as the target thickness.

[0062] The concentration threshold is the hydrogen accommodation limit of the hydrogen embrittlement resistant layer and corresponds to the material of the hydrogen embrittlement resistant layer.

[0063] The temperature threshold is the melting point of the material of the hydrogen embrittlement resistant layer and is related to the material of the hydrogen embrittlement resistant layer, the target cooling structure, and the flow rate of the cooling water.

[0064] In conventional techniques, hydrogen diffusivity obtained by conventional methods is often obtained by simply simulating the hydrogen atom concentration distribution in the longitudinal direction of a proton beam. However, such simulation methods cannot accurately and completely represent the actual distribution of the proton beam in three-dimensional space, and therefore cannot accurately obtain the effect of proton collisions on the three-dimensional structure of the target. As a result, the obtained hydrogen atom concentration distribution characteristics often have problems such as low accuracy. For similar reasons, the temperature distribution characteristics obtained by conventional methods also have problems such as low accuracy.

[0065] In order to improve the accuracy of the hydrogen atom concentration distribution characteristics obtained by fitting, in some optional embodiments, the implementation method for obtaining the corresponding hydrogen atom concentration distribution characteristics by performing hydrogen diffusivity fitting based on the deposition distribution for the target corresponding to the above current thickness includes the following, as shown in FIG. 5 :

[0066] S301A: The proton beam intensity is converted into the corresponding molar flow rate of hydrogen atoms.

[0067] S301B: Based on the molar flow rate of the hydrogen atoms, the hydrogen atom concentration distribution along the incident direction of the target and the hydrogen atom concentration distribution along the reference plane are obtained by a physical field fitting method.

[0068] The reference plane is a plane perpendicular to the incident direction.

[0069] Specifically, the hydrogen atom concentration distribution of the proton beam in three-dimensional space includes a one-dimensional distribution along the incident direction and a two-dimensional distribution along a reference plane, which can be realized in a manner including, but not limited to, a Gaussian distribution, a uniform distribution, a top-hat distribution, a Laplace distribution, or a circular distribution.

[0070] S301C: The maximum hydrogen atom concentration is extracted from the hydrogen atom distribution corresponding to the target.

[0071] In a specific embodiment, when a Gaussian distribution is used for the two-dimensional distribution, obtaining the hydrogen atom concentration distribution along the incident direction of the target and the hydrogen atom concentration distribution along the reference plane by the above-mentioned physical field fitting method includes calculating the hydrogen atom concentration distribution along the incident direction of the proton beam in the hydrogen embrittlement-resistant layer and the target substrate by a Monte Carlo method, and calculating the hydrogen atom concentration distribution along the reference plane of the proton beam by a finite element simulation method, in order to obtain the hydrogen atom concentration distribution of the proton beam in three-dimensional space.

number

[0072] f in the formula sc (x, y, z) is the hydrogen atom concentration distribution of the proton beam in three-dimensional space, x and y are the coordinates of the proton beam on the reference plane, z is the coordinate of the proton beam in the incident direction, and σ is the standard deviation of the Gaussian distribution on the plane. For example, σ is 1 / 3 of the radius of the beam spot formed by the proton beam on the reference plane.

[0073] More specifically, the TRIM (Transport of Ions in Matter) fitting module of the SRIM (Stopping and Range of Ions in Matter) software is used to obtain the concentration distribution of hydrogen atoms in the incident direction. The diluted species transport module of the COMSOL Multiphysics software is then used to perform a finite element simulation of hydrogen diffusion based on predetermined boundary conditions. The boundary conditions include: the initial hydrogen atom concentration in the target is set to 0; the hydrogen atoms move to the surface and back of the target and then escape; therefore, the hydrogen atom concentrations on the surface and back of the target are set to 0 and there is no flux on the remaining surface; and the diffusion coefficient of hydrogen atoms in the hydrogen embrittlement-resistant layer and the active layer is isotropic.

[0074] After obtaining the hydrogen atom concentration distribution of the proton beam in three-dimensional space, in order to obtain the maximum hydrogen atom concentration more accurately, in a specific embodiment, the implementation method for extracting the maximum hydrogen atom concentration from the hydrogen atom distribution corresponding to the above target includes:

[0075] A three-dimensional region is divided into a mesh to obtain P mesh nodes.

[0076] Extract the three-dimensional coordinates corresponding to each mesh node. The three-dimensional coordinates are the first coordinate z of the node in the incident direction. i and a coordinate pair of the node on the reference plane, the coordinate pair including a second coordinate x i and the third coordinate y i It consists of:

[0077] The hydrogen atom concentration corresponding to each mesh node is extracted, and the maximum hydrogen atom concentration is extracted from each mesh node.

[0078] The extraction process includes: Based on the hydrogen atom concentration distribution along the incident direction of the target, the first coordinate z i The first hydrogen atom concentration C corresponding to S (zi ) is obtained. In addition, based on the hydrogen atom concentration distribution on the reference surface of the target, a second hydrogen atom concentration C M (x i ,y i ) to get the

[0079] The first hydrogen atom concentration C S (z i ) and the second hydrogen atom concentration C M (x i ,y i ) and calculate the hydrogen atom concentration C corresponding to the current node. H (x i ,y i ,z i ) to get the

[0080] It should be noted that in other embodiments, the hydrogen atom concentration distribution on the reference surface can be obtained by the above finite element simulation method, and can also be performed by other finite element software such as Ansys.

[0081] In order to improve the accuracy of the temperature distribution characteristics obtained by fitting, in some optional embodiments, the implementation method for obtaining the corresponding temperature distribution characteristics by performing thermal performance fitting based on the energy distribution for the target corresponding to the above current thickness includes the following, as shown in FIG. 6 :

[0082] S302A: Converts the power of the proton beam into heat power corresponding to the target.

[0083] S302B: Based on the heat source output, the temperature distribution along the incident direction of the target and the temperature distribution along the reference plane are obtained by a physical field fitting method.

[0084] S302C: Extract the maximum temperature from the temperature distribution corresponding to the target.

[0085] In a specific embodiment, when a Gaussian distribution is used for the two-dimensional distribution, obtaining the temperature distribution along the incident direction of the target and the temperature distribution along the reference plane by the above-mentioned physical field fitting method includes calculating the temperature distribution along the incident direction of the proton beam in the hydrogen embrittlement-resistant layer and the target substrate by a Monte Carlo method, and calculating the temperature distribution along the reference plane of the proton beam by a finite element simulation method.

number

[0086] f in the formula nl (x,y,z) is the temperature distribution of the proton beam in three-dimensional space, and f nl (z) is the temperature distribution along the incident direction of the proton beam, x and y are the coordinates of the proton beam on the reference plane, z is the coordinate of the proton beam in the incident direction, and σ is the standard deviation of the Gaussian distribution on the plane. For example, σ is 1 / 3 of the radius of the beam spot formed by the proton beam on the reference plane.

[0087] More specifically, obtaining the temperature distribution along the incident direction of the target and the temperature distribution along the reference plane through the above physical field fitting method includes:

[0088] That is, the TRIM fitting module of the SRIM software is used to obtain the energy distribution along the incident direction of the target, and the solid heat transfer module of the COMSOL Multiphysics software is used to perform a finite element simulation of the temperature based on the predetermined boundary conditions to obtain the energy distribution along the reference plane.

[0089] After obtaining the temperature distribution of the proton beam in three-dimensional space, in order to obtain the maximum temperature more accurately, in a specific embodiment, the implementation method for extracting the maximum temperature from the temperature distribution corresponding to the above target includes the following:

[0090] A second mesh division is performed on the three-dimensional region to obtain Q mesh nodes.

[0091] Extract the three-dimensional coordinates corresponding to each mesh node. The three-dimensional coordinates are the first coordinate z of the node in the incident direction. i and a coordinate pair of the node on the reference plane, the coordinate pair including a second coordinate x i and the third coordinate y i It consists of:

[0092] The temperature corresponding to each mesh node is extracted, and the maximum temperature is extracted from each mesh node.

[0093] The extraction process includes: Based on the temperature distribution along the incident direction of the target, the first coordinate z i The first temperature W S (z i ) is acquired. Also, based on the temperature distribution on the reference surface of the target, a second temperature W corresponding to the second coordinate and the third coordinate is acquired. M (x i ,y i ) to get the

[0094] The first temperature W S (z i ) and the second temperature W M (x i ,y i ) and calculate the temperature W corresponding to the current mesh node. H (x i ,y i ,z i ) to get the

[0095] It should be noted that in other embodiments, the temperature distribution on the reference surface of the target obtained by the above finite element simulation method may also be performed by other finite element software such as Ansys.

[0096] The method for obtaining the target thickness of a hydrogen embrittlement-resistant layer of a neutron source target provided in this embodiment performs a hydrogen diffusivity evaluation based on deposition distribution for a target including a hydrogen embrittlement-resistant layer, and performs thermal performance fitting based on energy distribution to obtain a target thickness that simultaneously satisfies the hydrogen diffusivity evaluation conditions and the thermal performance evaluation conditions of the energy distribution. This makes it possible to quickly and easily obtain the target thickness of the hydrogen embrittlement-resistant layer that is appropriate for the thickness of the action layer and the material, thereby improving the hydrogen resistance performance of the target and effectively improving the thermal performance of the target.

[0097] In some embodiments, after introducing a hydrogen embrittlement-resistant layer into the target structure, the hydrogen embrittlement-resistant layer may interact with neutrons generated in the target, thereby affecting the performance of the neutrons themselves. In order to reduce the effect of the hydrogen embrittlement-resistant layer on the neutron yield of the target and further improve the accuracy of evaluating the overall performance corresponding to the hydrogen embrittlement-resistant layer, in some optional embodiments, after performing S200, the method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target further includes, as shown in FIG. 7 :

[0098] S300: A neutron yield performance evaluation is performed on a target including a hydrogen embrittlement resistant layer of the target thickness, thereby obtaining a target thickness that satisfies the neutron yield performance evaluation conditions.

[0099] Specifically, step S300 includes the following when specifically performed:

[0100] The target thickness obtained after execution of step S200 is set as the initial target thickness.

[0101] For one of the initial target thicknesses, a simulation model is constructed based on the target corresponding to the initial target thickness (including the hydrogen embrittlement-resistant layer of the initial target thickness) to simulate the perpendicular collision of the proton beam with the target, and the simulation model is a spherical coordinate system centered on the target.

[0102] Based on the simulation model, the neutron yield of the target within a predetermined radiation range in the proton emission direction is extracted.

[0103] The system detects whether the neutron yield satisfies a yield threshold, and if so, determines that the neutron yield of the target corresponding to the initial target thickness satisfies a predetermined neutron yield requirement, and sets the initial target thickness as the final target thickness. On the other hand, if not, determines that the neutron yield of the target corresponding to the initial target thickness does not satisfy the predetermined neutron yield requirement. The neutron yield requirement includes one or more performance thresholds of the neutron spectrum, the neutron angular distribution, or other neutron yield evaluation characteristics.

[0104] More specifically, we used the PHITS software to construct a simulation model in which a proton beam strikes a target perpendicularly. As shown in Figure 8, the simulation model is a spherical coordinate system in which the center of the target is the center of a sphere and the direction of the proton beam is the positive z-axis. We then extracted the neutron yield of the target within 50° of the proton emission direction.

[0105] In some optional embodiments, the method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target, before performing step S100, further includes, as shown in FIG. 9 :

[0106] S800: Determine the energy of the proton beam incident on the hydrogen embrittlement-resistant layer based on the material and thickness of the active layer on the target and the magnitude of the energy of the proton beam incident on the target. After determining the material of the hydrogen embrittlement-resistant layer, combine the energy of the proton beam incident on the hydrogen embrittlement-resistant layer based on the material type of the hydrogen embrittlement-resistant layer to obtain the reference thickness of the hydrogen embrittlement-resistant layer.

[0107] Specifically, after determining the material of the action layer, the reaction energy threshold corresponding to the action layer is determined, and the thickness of the action layer is determined based on the reaction energy threshold and the magnitude of the energy of the incident proton beam at the target.

[0108] After determining the material and thickness of the action layer, the energy of the incident proton beam on the hydrogen embrittlement resistant layer is determined based on the magnitude of the energy of the incident proton beam on the target.

[0109] Based on the material type of the hydrogen embrittlement resistant layer and the energy of the incident proton beam at the hydrogen embrittlement resistant layer, a Monte Carlo method is used to obtain the reference thickness of the hydrogen embrittlement resistant layer.

[0110] The reaction energy threshold is the magnitude of the minimum energy threshold required for protons to cause a neutron reaction between the material of the working layer and the protons.

[0111] More specifically, the implementation manner for determining the thickness of the working layer based on the above-mentioned reaction energy threshold and the energy magnitude of the incident proton beam on the target includes:

[0112] Based on the beam parameters of the current proton beam, a first proton irradiation distance of the proton beam along the incident direction in the action layer is obtained using the SRIM method. Based on the reaction energy threshold, a second proton irradiation distance corresponding to the reaction energy threshold is obtained. The first proton irradiation distance and the second proton irradiation distance are subtracted, and the difference between these irradiation distances is obtained as the effective thickness of the action layer.

[0113] Based on the same technical concept, the present application provides, in a second aspect, a method for designing a hydrogen embrittlement-resistant layer of a neutron source target, which is used to obtain, based on a design plan for a functional layer of a target, a design plan for a hydrogen embrittlement-resistant layer that is adapted to the design plan for the functional layer. The design plan for the hydrogen embrittlement-resistant layer includes the material and thickness of a structural layer.

[0114] 10, which shows a schematic flow chart of an embodiment of the method for designing a hydrogen embrittlement resistant layer of a neutron source target. As shown in FIG. 10, the method includes:

[0115] S10: The material and thickness of the active layer in the target are obtained, and one material is selected as the current material from the candidate materials for the hydrogen embrittlement resistant layer.

[0116] All candidate materials for the hydrogen embrittlement resistant layer have a hydrogen diffusion coefficient greater than that of the target substrate, and are used to improve the hydrogen embrittlement resistance of the target by accommodating hydrogen atoms in the reaction process of the neutron source.

[0117] By way of example, the material of the hydrogen embrittlement resistant layer includes, but is not limited to, tantalum (Ta), vanadium (V), and niobium (Nb).

[0118] S20: Based on the material and thickness of the working layer, the energy magnitude of the incident proton beam on the target and the current material of the hydrogen embrittlement resistant layer are combined to determine the reference thickness of the hydrogen embrittlement resistant layer corresponding to the current material.

[0119] Specifically, the energy of the proton beam incident on the target is determined based on the material and thickness of the active layer, and the energy of the proton beam incident on the hydrogen embrittlement-resistant layer is determined based on the current material of the hydrogen embrittlement-resistant layer by combining the energy of the proton beam incident on the hydrogen embrittlement-resistant layer to obtain the reference thickness of the hydrogen embrittlement-resistant layer corresponding to the current material.

[0120] S30: Based on the reference thickness, a target thickness of the hydrogen embrittlement resistant layer is obtained.

[0121] Specifically, after determining the reference thickness of the hydrogen embrittlement-resistant layer, the target thickness of the hydrogen embrittlement-resistant layer is obtained using the method for obtaining the target thickness of the hydrogen embrittlement-resistant layer of the neutron source target described in any of the above examples.

[0122] S40: Based on the target thickness of the hydrogen embrittlement-resistant layer, it is determined whether the neutron yield distribution of the target corresponding to the target thickness satisfies a predetermined condition for the neutron yield, and if so, the target thickness is set as the target thickness corresponding to the current material.

[0123] Specifically, the method for realizing this step is the same as that in the above embodiment, and therefore will not be described in detail again here.

[0124] S50: The current material and the target thickness corresponding to the current material are combined to obtain a design proposal for the hydrogen embrittlement resistant layer.

[0125] It is to be noted that in another embodiment, the method for designing a hydrogen embrittlement resistant layer of a neutron source target, after performing step S50, further includes, as shown in FIG.

[0126] S60: The current material of the hydrogen embrittlement resistant layer is updated, and the above steps S20 to S50 are executed again based on the new current material, thereby obtaining a plurality of design proposals for the hydrogen embrittlement resistant layer.

[0127] To solve the technical problems in the prior art, an embodiment of the present invention further provides a terminal. Please refer to FIG. 12, which shows a schematic structural diagram of the terminal in the present invention. As shown in FIG. 12, the terminal 700 includes a memory 702 and a processor 701 connected to each other. The memory 702 is used to store computer programs, and the processor 701 is used to execute the computer programs stored in the memory. During execution, the terminal can perform the steps of the method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target or the method for designing a hydrogen embrittlement-resistant layer of a neutron source target.

[0128] Optionally, the number of memories may be one or more, and the number of processors may be one or more.

[0129] Optionally, the processor of the terminal loads one or more instructions corresponding to the process of an application program into memory according to the steps of the above-mentioned method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target, and then executes the application program stored in memory by the processor to realize each function of the method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target, which will not be described in further detail here.

[0130] It should be noted that memory includes, but is not limited to, random access memory (RAM) and may further include non-volatile memory, such as at least one magnetic disk memory. Similarly, a processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc., a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component.

[0131] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when invoked by a processor, realizes the method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target or the method for designing a hydrogen embrittlement-resistant layer of a neutron source target.

[0132] A computer-readable storage medium may be a tangible device capable of holding and storing instructions for use in an instruction execution device. The computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EPROM or flash memory), static RAM (SRAM), compact disk-read-only memory (CD-ROM), digital versatile disk (DVD), memory stick, floppy disk, and mechanical coding devices.

[0133] The computer-readable programs described herein may be downloaded from a computer-readable storage medium to each computing / processing device, or may be downloaded to an external computer or external storage device over a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. A network adapter card or network interface of each computing / processing device receives computer-readable program instructions from the network and transfers the computer-readable program instructions for storage in the computer-readable storage medium of each computing / processing device.

[0134] In summary, the present invention provides a method for obtaining a target thickness of a hydrogen embrittlement-resistant layer for a neutron source target, a method for designing a hydrogen embrittlement-resistant layer, a terminal, and a computer storage medium. These methods perform comprehensive performance evaluations of hydrogen diffusivity and thermal performance for a target including a hydrogen embrittlement-resistant layer, and then, based on the evaluation results, obtain a target thickness that satisfies predetermined conditions for the hydrogen atom concentration field and predetermined conditions for the temperature field. This makes it possible to quickly and easily obtain a target thickness for a hydrogen embrittlement-resistant layer that is compatible with the physical field performance of other structural layers (e.g., working layers) in the target, thereby improving the target's hydrogen resistance and overall performance. Furthermore, the methods of the present invention can be applied to target structures with different types of working layer materials, thereby improving the scalability and flexibility of target structure installation.

[0135] For targets corresponding to each candidate thickness of the hydrogen embrittlement-resistant layer, selection of hydrogen diffusivity based on deposition distribution is performed, and a coupled analysis and selection of thermal performance based on energy distribution is performed. This allows for the selection and acquisition of a target thickness that simultaneously satisfies the specified conditions for the hydrogen atom concentration field and the specified conditions for the temperature field. This allows for the target thickness of the hydrogen embrittlement-resistant layer that is appropriate for the thickness and material of the working layer to be quickly and easily obtained, thereby improving the hydrogen resistance of the target and effectively improving the thermal performance of the target. Furthermore, selection of neutron yield is performed for targets corresponding to each candidate thickness of the hydrogen embrittlement-resistant layer, allowing the thickness of the hydrogen embrittlement-resistant layer obtained by selection to be more appropriately adapted to the neutron yield of the target. This further improves the overall performance of the target. Furthermore, the method of the present invention is highly scalable and flexible because it can be applied to target structures with different working layer materials.

[0136] The above-described embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Those skilled in the art can supplement or modify the above embodiments without departing from the spirit and scope of the present invention. Therefore, any equivalent supplements or modifications that those skilled in the art can make without departing from the spirit and technical concept disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A method for obtaining a target thickness of a hydrogen embrittlement resistant layer of a neutron source target, comprising: The target includes a working layer, a hydrogen embrittlement resistant layer, and a target substrate, and the method includes: determining a current thickness of the hydrogen embrittlement resistant layer, said current thickness being equal to or greater than a reference thickness of said hydrogen embrittlement resistant layer; Using a physical field fitting method, perform a hydrogen diffusivity fitting based on a deposition distribution and a thermal performance fitting based on an energy distribution for the target, respectively, to obtain a hydrogen atom concentration distribution characteristic and a corresponding temperature distribution characteristic corresponding to the current thickness; detecting whether the hydrogen atom concentration distribution characteristic satisfies a predetermined condition of a hydrogen atom concentration field, and detecting whether the temperature distribution characteristic satisfies a predetermined condition of a temperature field, and if both are satisfied, setting the current thickness as a target thickness of the hydrogen embrittlement resistant layer; Including, The method for obtaining the target thickness of a hydrogen embrittlement-resistant layer of a neutron source target is characterized in that the reference thickness is determined based on the material and thickness of the active layer, by combining the magnitude of the energy of the incident proton beam in the target and the current material of the hydrogen embrittlement-resistant layer, thereby determining the reference thickness of the hydrogen embrittlement-resistant layer corresponding to the current material.

2. The method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target as described in claim 1 further comprises, if any of the conditions is not satisfied, updating the current thickness based on a predetermined adjustment threshold and executing the method for obtaining a target thickness of a hydrogen embrittlement-resistant layer again based on the new current thickness until the target thickness is obtained.

3. The implementation method for performing hydrogen diffusivity fitting based on deposition distribution for a target using the above physical field fitting method is as follows: Converting the proton beam intensity to the corresponding molar flow rate of hydrogen atoms; obtaining a hydrogen atom concentration distribution along the incident direction of the target and a hydrogen atom concentration distribution along a reference plane by a physical field fitting method based on the molar flow rate of the hydrogen atoms, and extracting a maximum hydrogen atom concentration from the hydrogen atom distribution corresponding to the target; The method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target according to claim 1, further comprising:

4. To obtain the hydrogen atom concentration distribution of the proton beam in three-dimensional space, The method for obtaining the hydrogen atom concentration distribution along the target incident direction using the above physical field fitting method is as follows: calculating a hydrogen atom concentration distribution along the incident direction of the proton beam in the target by a Monte Carlo method; and / or The realization method for obtaining the hydrogen atom concentration distribution along the reference surface of the target using the above physical field fitting method is as follows:

4. The method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target according to claim 3, further comprising calculating a hydrogen atom concentration distribution along a reference plane of the proton beam by a finite element simulation method.

5. The hydrogen atom concentration distribution of the proton beam in three-dimensional space is expressed by the following formula: [Equation 5] f in the formula ｓｃ 5. The method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target according to claim 4, wherein (x, y, z) is the hydrogen atom concentration distribution of the proton beam in three-dimensional space, x and y are the coordinates of the proton beam on the reference plane, z is the coordinate of the proton beam in the incident direction, and σ is the standard deviation of the Gaussian distribution on the plane.

6. The implementation method for performing thermal performance fitting based on the energy distribution for a target using the above physical field fitting method is as follows: converting the power of the proton beam into a corresponding heat source power at the target; According to the heat source output, a temperature distribution along the incident direction of the target and a temperature distribution along the reference plane are obtained by a physical field fitting method, and a maximum temperature is extracted from the temperature distribution corresponding to the target; The method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target according to claim 1, further comprising:

7. To obtain the temperature distribution of the proton beam in three-dimensional space, The realization method for obtaining the temperature distribution along the incident direction of the target using the above physical field fitting method is as follows: calculating a temperature distribution along the direction of incidence of the proton beam in the target by a Monte Carlo method; and / or The realization method for obtaining the temperature distribution along the reference surface of the target using the above physical field fitting method is as follows:

7. The method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target according to claim 6, further comprising calculating a temperature distribution along a reference plane of the proton beam by a finite element simulation method.

8. The temperature distribution of the proton beam in three-dimensional space is expressed by the following formula: [Equation 6] f in the formula ｎｌ (x, y, z) is the temperature distribution of the proton beam in three-dimensional space, and f ｎｌ 8. A method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target as described in claim 7, characterized in that (z) is the temperature distribution along the incident direction of the proton beam, x and y are the coordinates of the proton beam on the reference plane, z is the coordinate of the proton beam in the incident direction, and σ is the standard deviation of the Gaussian distribution on the plane.

9. Furthermore, A method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target as described in claim 1, characterized in that it includes performing a neutron yield performance evaluation on a target including a hydrogen embrittlement-resistant layer of the target thickness to obtain a target thickness that satisfies neutron yield performance evaluation conditions.

10. A method for designing a hydrogen embrittlement resistant layer of a neutron source target, comprising: The target includes a working layer, a hydrogen embrittlement resistant layer, and a target substrate, and the method includes: determining a current material of the hydrogen embrittlement resistant layer, the current material being a material having a hydrogen diffusion coefficient greater than a hydrogen diffusion coefficient corresponding to the target substrate; Based on the material and thickness of the action layer, determining a reference thickness of the hydrogen embrittlement resistant layer corresponding to the current material by combining the magnitude of the energy of the incident proton beam at the target and the current material of the hydrogen embrittlement resistant layer; acquiring a target thickness of the hydrogen embrittlement-resistant layer based on the reference thickness using the method for acquiring a target thickness of the hydrogen embrittlement-resistant layer according to any one of claims 1 to 8; detecting whether or not a neutron yield distribution of a target corresponding to the target thickness satisfies a predetermined condition for neutron yield based on the target thickness of the hydrogen embrittlement-resistant layer, and if so, setting the target thickness as a target thickness corresponding to the current material; combining the current material with a target thickness corresponding to the current material to obtain a design proposal for a hydrogen embrittlement resistant layer; A method for designing a hydrogen embrittlement resistant layer of a neutron source target, comprising:

11. Detecting whether or not the neutron yield distribution of the target corresponding to the target thickness satisfies a predetermined condition of the neutron yield, constructing a simulation model for simulating perpendicular collision of a proton beam with a target corresponding to the target thickness, the simulation model being in a spherical coordinate system with the target as the center; extracting, in the simulation model, a neutron yield of the target within a predetermined radiation range in a proton emission direction; Detecting whether the neutron yield satisfies a yield threshold, and if so, determining that the neutron yield of the target corresponding to the target thickness satisfies a predetermined neutron yield requirement; The method for designing a hydrogen embrittlement resistant layer of a neutron source target according to claim 10, further comprising:

12. A terminal, A terminal comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory to cause the terminal to perform a method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target described in any one of claims 1 to 8.

13. A computer storage medium on which a computer program is stored, A computer storage medium, characterized in that, when the computer program is executed by a processor, the method for obtaining a target thickness of a hydrogen embrittlement-resistant layer of a neutron source target according to any one of claims 1 to 8 is realized.

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