Sampling measurement width calculation method of radial collimator, terminal and storage medium

Abstract

The application provides a sampling measurement width calculation method of a radial collimator, a terminal and a storage medium. The sampling measurement width calculation method comprises the following steps: S101: setting a sample diameter and a neutron slit width according to a sampling measurement width theoretical value, and selecting a step distance through the sampling measurement width theoretical value and the sample diameter; S102: obtaining a neutron intensity distribution experimental curve through scattered neutron measurement based on the step distance, and obtaining a sampling measurement width value according to the neutron intensity distribution experimental curve and the sample diameter. The application can obtain an accurate sampling measurement width value, is not prone to calculation deviation, and improves the accuracy and reliability of a measurement result.

Description

Technical Field

[0001] This invention relates to the field of neutron scattering technology, and in particular to a method for calculating the sampling measurement width of a radial collimator, a terminal, and a storage medium. Background Technology

[0002] Neutrons and X-rays are both powerful tools for exploring the microscopic structure of matter, and neutron sources are large scientific devices that produce neutrons. Based on the different methods of neutron beam generation, high-power neutron sources can be divided into reactor neutron sources and accelerator-based pulsed spallation neutron sources. Neutron diffraction spectrometers are the experimental terminals of neutron sources. The basic principle of spallation neutron source-based neutron diffraction spectrometers is as follows: high-energy protons bombard a heavy metal target, causing a spallation reaction. The resulting neutrons travel through transport lines to the sample, react with the sample, and then disperse again. By using a neutron detector to collect neutron signals at specific angles, the microscopic structure of the sample can be deduced.

[0003] The radial collimator is an essential component of a neutron diffraction spectrometer, playing a crucial role in measuring the spatial distribution of neutron diffraction residual stress. The most critical parameter in the radial collimator is the sampling measurement width. In practice, the radial collimator is manufactured based on the theoretical value of the sampling measurement width, and experimental measurements are performed using this theoretical value. However, in actual use, deviations still exist between the theoretical and actual values, resulting in inaccurate measurement results and reduced experimental reliability. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a method for calculating the sampling measurement width of a radial collimator, a terminal, and a storage medium. Before performing neutron scattering measurements, the sample diameter and neutron slit width are set according to the theoretical value of the sampling measurement width. The step size is selected using the theoretical value of the sampling measurement width and the sample diameter. The neutron intensity distribution experimental curve is obtained by performing neutron scattering measurements using this step size. Then, the actual sampling measurement width value is obtained based on the experimental curve and the sample diameter. This method can obtain an accurate sampling measurement width value, is less prone to calculation deviations, and improves the accuracy and reliability of the measurement results.

[0005] To solve the above problems, the present invention adopts a technical solution as follows: a method for calculating the sampling measurement width of a radial collimator, the method comprising: S101: setting the sample diameter and neutron slit width according to the theoretical value of the sampling measurement width, and selecting the step size through the theoretical value of the sampling measurement width and the sample diameter; S102: obtaining the experimental curve of neutron intensity distribution by performing neutron scattering measurement based on the step size, and obtaining the sampling measurement width value according to the experimental curve of neutron intensity distribution and the sample diameter.

[0006] Furthermore, the step of setting the sample diameter and neutron slit width based on the theoretical value of the sampling measurement width specifically includes: determining the range of values ​​for the sample diameter based on the theoretical value of the sampling measurement width, selecting the sample diameter based on the range of values, and determining the neutron slit width based on the sample diameter.

[0007] Furthermore, the sample diameter is consistent with the width of the neutron slit.

[0008] Furthermore, before the step of selecting the step distance by sampling and measuring the theoretical value of the width and the sample diameter, the method further includes: determining the initial position by the sample center and the sampling center of the radial collimator, and determining the step distance by moving the sample along the initial position and measuring the distance.

[0009] Furthermore, the step of selecting the step distance by sampling and measuring the theoretical value of the width and the sample diameter specifically includes: obtaining the specification information of the sampling and measuring theoretical value of the width and the sample diameter, and selecting the step distance based on the specification information.

[0010] Furthermore, the step of obtaining the experimental curve of neutron intensity distribution by measuring scattered neutrons based on step size specifically includes: moving the sample step by step according to the step size and initial position, and collecting the scattered neutron signal for a predetermined time after each sample movement, and generating the experimental curve of neutron intensity distribution based on the scattered neutron signal and sample position.

[0011] Furthermore, the step of obtaining the sampling measurement width value based on the neutron intensity distribution experimental curve and the sample diameter specifically includes: obtaining the half-width at half-maximum (WHM) of the neutron intensity distribution experimental curve, and calculating the sampling measurement width value using the WHM and the sample diameter.

[0012] Furthermore, through the formula Calculate the sampling measurement width value, where Γ t It is the full width at half maximum (FWHM) of the neutron intensity distribution experimental curve, Γ S It is the sample diameter, Γ c It is the half-width at half-maximum (W) of the radial collimator sampling measurement width response function, i.e., the sampling measurement width value W. g .

[0013] Based on the same inventive concept, the present invention also proposes an intelligent terminal, which includes a processor and a memory. The processor is communicatively connected to the memory, and the memory stores a computer program. The computer program is used to execute the sampling measurement width calculation method of the radial collimator as described above.

[0014] Based on the same inventive concept, the present invention also proposes a computer-readable storage medium storing program data, which is used to execute the radial collimator sampling measurement width calculation method as described above.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Before performing neutron scattering measurement, the sample diameter and neutron slit width are set according to the theoretical value of the sampling measurement width, and the step size is selected using the theoretical value of the sampling measurement width and the sample diameter. The neutron intensity distribution experimental curve is obtained by performing neutron scattering measurement through this step size, and then the actual sampling measurement width value is obtained according to the experimental curve and the sample diameter. This can obtain an accurate sampling measurement width value, is less prone to calculation deviation, and improves the accuracy and reliability of the measurement results. Attached Figure Description

[0016] Figure 1 This is a flowchart of an embodiment of the sampling measurement width calculation method for the radial collimator of the present invention;

[0017] Figure 2 This is a schematic diagram of the experimental setup for an embodiment of the sampling measurement width measurement in the radial collimator sampling measurement width calculation method of the present invention;

[0018] Figure 3 This is a schematic diagram of an embodiment of the neutron field of view of the radial collimator in the sampling measurement width calculation method of the radial collimator of the present invention;

[0019] Figure 4 This is a schematic diagram of an embodiment of the neutron intensity simulation distribution spectrum in the sampling measurement width calculation method of the radial collimator of the present invention;

[0020] Figure 5 This is a schematic diagram of an embodiment of the simulation curve of neutron intensity versus sample movement position in the sampling measurement width calculation method of the radial collimator of the present invention;

[0021] Figure 6 This is a structural diagram of an embodiment of a smart terminal;

[0022] Figure 7 This is a structural diagram of an embodiment of the computer-readable storage medium of the present invention. Detailed Implementation

[0023] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that the various embodiments of this disclosure described and shown in the accompanying drawings can be combined with each other without conflict, and the structural components or functional modules can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this disclosure provided in the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely represents selected embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure.

[0024] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0025] Please see Figure 1-5 ,in, Figure 1 This is a flowchart of an embodiment of the sampling measurement width calculation method for the radial collimator of the present invention; Figure 2 This is a schematic diagram of the experimental setup for an embodiment of the sampling measurement width measurement in the radial collimator sampling measurement width calculation method of the present invention; Figure 3 This is a schematic diagram of an embodiment of the neutron field of view of the radial collimator in the sampling measurement width calculation method of the radial collimator of the present invention; Figure 4 This is a schematic diagram of an embodiment of the neutron intensity simulation distribution spectrum in the sampling measurement width calculation method of the radial collimator of the present invention;

[0026] Figure 5 This is a schematic diagram of an embodiment of the simulation curve of neutron intensity versus sample movement position in the sampling measurement width calculation method of the radial collimator of the present invention. (Combined with...) Figure 1-5 The method for calculating the sampling measurement width of the radial collimator of the present invention is explained.

[0027] In this embodiment, the device for calculating the sampling measurement width using the radial collimator is a smart terminal. This smart terminal can be a neutron diffraction spectrometer, a computer, host, control terminal, mobile phone, or any other terminal that can be used to calculate the sampling measurement width and is connected to the neutron diffraction spectrometer or radial collimator.

[0028] The structure of the measuring device used to obtain the sampling measurement width is as follows: Figure 2 , Figure 3 As shown. The main design parameters of the radial collimator include the horizontal coverage angle and the vertical coverage angle, and the collimation absorption plate (…). Figure 3 The collimator spacer in the image has a thickness of t, the collimator absorber has a length of l, the distance from the sample to the collimator is R1, the distance from the sample to the detector is L2, the angle between two adjacent collimator absorbers is α, the inlet gap (the distance between the ends of two collimator absorbers that are closest to each other) is S1, the outlet gap (the distance between the ends of two collimator absorbers that are furthest from each other) is S2, and the maximum field of view of the sample is W. gmax The detector's maximum field of view is W dmax The detector's field of view is W d The sampling measurement width (half-width) of the sample is Wg.

[0029] For example, in an engineering materials diffraction spectrometer, the overall horizontal coverage angle of the detector is designed to be 30°, and the vertical coverage angle is 40°. To maximize coverage of the detector's effective area, the radial collimator coverage angle is slightly larger than the detector coverage angle, resulting in a horizontal coverage angle of 31° and a vertical coverage angle of 41°. The neutron transmittance is (S1-t) / S1.

[0030] pass Figure 3 The geometric relationships between the components of the radial collimator can be used to obtain the sampling measurement width distribution function of the radial collimator for the intensity of neutrons scattered from the sample: Experience shows that two functions can ideally describe actual data curves: a triangular distribution and a Gaussian distribution. If a Gaussian distribution function is chosen, the maximum field of view W of the sample can be determined by selecting different confidence intervals. gmax With half-width W g The multiple relationship between them may deviate slightly. Considering a scenario closer to reality, let's assume the sample's maximum field of view is W. gmax It has a 98% confidence interval of ±2.33σ, where σ is the standard deviation, i.e., W. gmax = 2 × 2.33σ. And the full width at half maximum (FWHM) of the Gaussian distribution function is W. g There is a fixed relationship between it and the standard deviation σ.

[0031]

[0032] Therefore, it is possible to obtain Calculations show that Wg is 0.5W. gmax If a triangular distribution function is chosen to describe the neutron intensity sampling measurement width distribution function of the radial collimator, its half-width W can be determined through geometric analysis. g It is also the maximum field of view W of the samplegmax Half of it.

[0033] For the design and manufacture of a radial collimator, its sampling measurement width W is first determined based on the actual physical requirements of its use. g The design value. From the above analysis, it can be seen that the maximum field of view W of the sample... gmax It is W g Twice. Through the formula The appropriate parameters for designing the radial collimator include the length *l* of the absorber plate, the distance *R1* from the sample to the collimator, and the angle *α* between two adjacent collimating absorber plates. Then, the radial collimator is manufactured according to these parameters, resulting in a radial collimator device with the theoretical value of the sampling measurement width. The actual sampling measurement width of the fabricated radial collimator device still needs to be determined experimentally.

[0034] like Figure 2 As shown, the incident neutron beam enters the sample through a slit. The neutrons scattered by the sample pass through a radial collimator and enter the detector, which collects the neutron position and intensity information. The sample uses incoherent scattering materials such as vanadium, plexiglass, and plastics, which primarily undergo incoherent scattering. After the neutrons enter the sample, the scattered neutrons exhibit an isotropic and uniform scattering distribution. The detector's size is designed to ensure comprehensive collection of all neutron signals emitted from the radial collimator.

[0035] according to Figure 2 A mathematical model was established for the experimental configuration shown, and then analytical calculations were performed to obtain the response function describing the distribution curve of the experimental data. Finally, the experimental data were fitted using the theoretical response curve function, and the accurate value of the radial collimator sampling measurement width was further calculated.

[0036] Assume the incident neutron beam is a uniform parallel beam. A cylindrical incoherent scattering sample of diameter d is used. Neutrons are incident on the sample and undergo isotropic inelastic scattering. The intensity distribution function of the scattered neutrons along the horizontal x-direction is described by a Gaussian function:

[0037]

[0038] Among them, I s (x) is the scattered neutron intensity distribution function, I s0 σ is the strength coefficient. s Standard deviation, half-width at half-height: FWHM s =d. The radial collimator sampling measurement width response function, i.e., the experimental measurement curve corresponding to the ideal case of an infinitesimally small sample diameter, can also be described by the Gaussian distribution function:

[0039]

[0040] Among them, I c (x) is the sampling measurement width response function, I c0 σ is the strength coefficient. c The standard deviation is given. The initial position of the sample is set at the center zero point of the radial collimator, symmetrically positioned. Based on the theoretical value of the sampling measurement width and the sample diameter, the step size is set, and a reasonable measurement range is selected. The sample is moved along the x-direction, and the neutron intensity information recorded by the detector is collected at each step to obtain the experimental measurement data of the radial collimator sampling measurement width. Through mathematical model analysis, the theoretical function describing the experimental measurement data curve (neutron intensity distribution experimental curve) is: Among them, I t0 σ is the strength coefficient. t Let I be the standard deviation, γ be the integral variable, and I be the standard deviation. t (x) represents the neutron intensity. Mathematical analysis reveals the following relationship between the three standard deviations: The following relationship exists between the full width at half maximum (FWHM) and standard deviation of a Gaussian distribution function: therefore, It can be obtained Among them, Γ t It is the half-width at half-maximum (WHM) of the collimation width measurement curve obtained experimentally, Γ S Γ is the full width at half maximum (FWHM) of the neutron intensity distribution function scattered by the sample. c It is the half-width at half-maximum (W) of the radial collimator sampling measurement width response function, and its value is the sampling measurement width W of the radial collimator. g .

[0041] The above calculation process shows that the method for calculating the sampling measurement width of the radial collimator includes:

[0042] S101: Set the sample diameter and neutron slit width according to the theoretical value of the sampling measurement width, and select the step size based on the theoretical value of the sampling measurement width and the sample diameter.

[0043] In this embodiment, the steps of setting the sample diameter and neutron slit width based on the theoretical value of the sampling measurement width specifically include: determining the range of sample diameter values ​​based on the theoretical value of the sampling measurement width, selecting the sample diameter based on the range, and determining the neutron slit width based on the sample diameter. Specifically, the sample diameter is smaller than the theoretical value of the sampling measurement width. The sample diameter is consistent with the neutron slit width.

[0044] Specifically, configure the sample, slit, radial collimator, and detector components; obtain the theoretical value of the sampling measurement width of the radial collimator, and select a suitable sample diameter. The sample diameter should be smaller than the sampling measurement width to help reduce measurement errors. For example, the theoretical design value of the sampling measurement width is 4mm, and the sample diameter is Γ. SYou can choose 2mm. Set the matching neutron slit width according to the sample diameter (the diameter and slit width should be the same). For example, if the sample diameter is 2mm, set the neutron slit width to 2mm.

[0045] In this embodiment, before the step of selecting the step distance by sampling and measuring the theoretical value of the width and the sample diameter, the method further includes: determining the initial position by the sample center and the sampling center of the radial collimator, and determining the step distance by measuring the distance the sample moves along the initial position.

[0046] Specifically, the initial position is set by the position of the sample center and the sampling center of the radial collimator, along... Figure 2 The sample is moved gradually in the horizontal direction as shown, and the distance the sample moves is determined as the step distance.

[0047] The steps for selecting the step size by sampling and measuring the theoretical width and sample diameter specifically include: obtaining the specification information of the theoretical width and sample diameter, and selecting the step size based on the specification information.

[0048] In this embodiment, the step size is determined based on the information input by the user. In other embodiments, step size ranges corresponding to different rule information can be pre-stored, and after determining the step size range, the step size is randomly generated within the step size range.

[0049] In one specific embodiment, the sampling measurement width is 4mm, the sample diameter is 2mm, and the step length is selected as 1mm.

[0050] S102: Obtain the experimental curve of neutron intensity distribution by measuring the scattered neutrons based on the step size, and obtain the sampling measurement width value based on the experimental curve of neutron intensity distribution and the sample diameter.

[0051] In this embodiment, the steps for obtaining the experimental curve of neutron intensity distribution based on step size neutron scattering measurement specifically include: moving the sample step by step according to the step size and initial position, and collecting the scattered neutron signal for a predetermined time after each sample movement, and generating the experimental curve of neutron intensity distribution based on the scattered neutron signal and the sample position.

[0052] The predetermined time is set based on the neutron scattering intensity and the number of sampling times. Neutron intensity information at different locations on the sample is obtained from the collected scattered neutron signals, leading to an experimental neutron intensity distribution curve. The function corresponding to this curve is...

[0053] In one specific embodiment, the sampling width is 4 mm, the sample diameter is 2 mm, and the step size can be selected as 1 mm. With each step, the detector collects scattered neutron signals for a certain period of time. The neutron data acquisition time is reasonably selected based on the scattering intensity (waiting for the neutron count to reach 10,000), and the detector neutron count is not lower than 10,000. Repeated measurements are performed to obtain experimental curves of neutron intensity distribution at different locations on the sample.

[0054] In this embodiment, the step of obtaining the sampling measurement width value based on the neutron intensity distribution experimental curve and the sample diameter specifically includes: obtaining the half-width at half-maximum (WHM) of the neutron intensity distribution experimental curve, and calculating the sampling measurement width value using the WHM and the sample diameter. Specifically, the WHM of the experimental curve is obtained by fitting the measurement data using a Gaussian function.

[0055] Specifically, after obtaining the full width at half maximum (FWHM), the formula is used... Calculate the sampling measurement width value, where Γ t It is the full width at half maximum (FWHM) of the neutron intensity distribution experimental curve, Γ S It is the sample diameter, Γ c It is the half-width at half-maximum (W) of the radial collimator sampling measurement width response function, i.e., the sampling measurement width value W. g .

[0056] After obtaining the sampling measurement width, the neutron collimator sampling measurement width can be simulated and calculated using the neutron ray tracing Monte Carlo simulation program McStas, and the simulation curve can be theoretically analyzed and verified. Figure 4 The image shows the neutron intensity distribution spectrum of the detector obtained through Monte Carlo simulation calculations. The radial collimator sampling measurement width is 4 mm, the sample is vanadium, and the sample diameter is 2 mm. Figure 5 The figure shows the distribution curve of the total neutron intensity collected by the detector as the sample deviates from the center position along the x-direction.

[0057] Table 1 shows the typical specifications of different radial collimators.

[0058]

[0059]

[0060] After obtaining the sampling measurement width value according to the calculation method of this invention, Monte Carlo simulation is performed, and further analysis and calculation yield the simulated fitted value of the radial collimator sampling measurement width. Compared with the theoretical design value, the deviation of the simulation results for the four collimator specifications is within 2%. Within the fitting error range, the simulated calculated value is consistent with the theoretical design value. The overall results show that the simulated data and the theoretical analytical curve have good consistency, which further confirms the feasibility of the calculation method of this invention. On the other hand, through comparison and verification of multiple methods, the reliability of the analysis results can be enhanced, helping experimental personnel to fully understand the physical background and implementation effect of the collimator sampling measurement width curve.

[0061] Beneficial effects: The sampling measurement width calculation method of the radial collimator of the present invention sets the sample diameter and neutron slit width according to the theoretical value of the sampling measurement width before performing neutron scattering measurement. It selects the step size using the theoretical value of the sampling measurement width and the sample diameter, and obtains the experimental curve of neutron intensity distribution through neutron scattering measurement using this step size. Then, the actual sampling measurement width value is obtained based on the experimental curve and the sample diameter. This method can obtain an accurate sampling measurement width value, is less prone to calculation deviation, and improves the accuracy and reliability of the measurement results.

[0062] Based on the same inventive concept, this invention also proposes a smart terminal, please refer to [link / reference]. Figure 6 , Figure 6 This is a structural diagram of an embodiment of the smart terminal of the present invention, combined with... Figure 6 The smart terminal of the present invention will be described in detail below.

[0063] In this embodiment, the smart terminal includes a processor and a memory. The processor and the memory are communicatively connected. The memory stores a computer program that is used to execute the sampling measurement width calculation method of the radial collimator as described in the above embodiment.

[0064] It should be noted that the smart terminal may include a processor, memory, network interface, and database connected via a system bus. The processor of the smart terminal provides computing and control capabilities. The memory of the smart terminal includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the smart terminal stores the data involved in the methods of the above embodiments. The network interface of the smart terminal is used for communication with external terminals via a network connection.

[0065] It should also be noted that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the computer device, connecting all parts of the computer device through various interfaces and lines.

[0066] The memory can be used to store computer programs and / or modules. The processor implements various functions of the computer device by running or executing the computer programs and / or modules stored in the memory, and by calling data stored in the memory. The memory may mainly include a program storage area and a data storage area. The program storage area may store the operating system, program instructions that implement the methods in the above embodiments, etc. The data storage area may store the data processed by the program instructions of the methods in the above embodiments.

[0067] Based on the same inventive concept, this invention also proposes a computer-readable storage medium, please refer to [link to relevant documentation]. Figure 7 , Figure 7 This is a structural diagram of an embodiment of the computer-readable storage medium of the present invention, in conjunction with... Figure 7 The computer-readable storage medium of the present invention will be described.

[0068] In this embodiment, a computer-readable storage medium stores program data that is used to execute the sampling measurement width calculation method for the radial collimator as described in the above embodiments.

[0069] The computer-readable storage medium may include, but is not limited to, floppy disks, optical disks, CD-ROMs (compact disc-read-only memory), magneto-optical disks, ROMs (read-only memory), RAMs (random access memory), EPROMs (erasable programmable read-only memory), EEPROMs (electrically erasable programmable read-only memory), magnetic cards or optical cards, flash memory, or other types of media / machine-readable media suitable for storing machine-executable instructions. This computer-readable storage medium may be a product not connected to a smart terminal or a component used in a smart terminal.

[0070] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0071] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for calculating the sampling measurement width of a radial collimator, characterized in that, The method for calculating the sampling measurement width of the radial collimator includes: S101: Set the sample diameter and neutron slit width according to the theoretical value of the sampling measurement width, and select the step size through the theoretical value of the sampling measurement width and the sample diameter; S102: Neutron intensity distribution experimental curves are obtained through neutron scattering measurements based on step size; the sampling measurement width value is then obtained based on the neutron intensity distribution experimental curves and the sample diameter; using the formula... Calculate the sampling measurement width value, where Γ t It is the full width at half maximum (FWHM) of the neutron intensity distribution experimental curve, Γ S It is the sample diameter, Γ c It is the half-width at half-maximum (W) of the radial collimator sampling measurement width response function, i.e., the sampling measurement width value W. g .

2. The method for calculating the sampling measurement width of the radial collimator as described in claim 1, characterized in that, The steps of setting the sample diameter and neutron slit width based on the theoretical value of the sampling measurement width specifically include: The range of values ​​for the sample diameter is determined based on the theoretical value of the sampling measurement width. The sample diameter is selected based on the range of values, and the neutron slit width is determined based on the sample diameter.

3. The method for calculating the sampling measurement width of the radial collimator as described in claim 2, characterized in that, The sample diameter is the same as the neutron slit width.

4. The method for calculating the sampling measurement width of the radial collimator as described in claim 1, characterized in that, Before the step of selecting the step size by sampling and measuring the theoretical value of the width and the sample diameter, the following steps are also included: The initial position is determined by the sample center and the radial collimator sampling center, and the moving distance of the sample along the initial position is determined as the step distance.

5. The method for calculating the sampling measurement width of the radial collimator as described in claim 4, characterized in that, The step of selecting the step size by sampling and measuring the theoretical value of the width and the sample diameter specifically includes: Obtain the theoretical value of the sampling measurement width and the specification information of the sample diameter, and select the step distance based on the specification information.

6. The method for calculating the sampling measurement width of the radial collimator as described in claim 5, characterized in that, The steps for obtaining the experimental curve of neutron intensity distribution based on step size neutron scattering measurement specifically include: The sample is moved step by step according to the step size and initial position, and the scattered neutron signal is collected for a predetermined time after each sample movement. The neutron intensity distribution experimental curve is generated based on the scattered neutron signal and the sample position.

7. The method for calculating the sampling measurement width of the radial collimator as described in claim 1, characterized in that, The step of obtaining the sampling measurement width value based on the neutron intensity distribution experimental curve and the sample diameter specifically includes: Obtain the half-width at half-maximum (WHM) of the neutron intensity distribution experimental curve, and calculate the sampling measurement width value using the WHM and the sample diameter.

8. A smart terminal, characterized in that, The smart terminal includes a processor and a memory, the processor being communicatively connected to the memory, the memory storing a computer program, and the computer program being used to execute the sampling measurement width calculation method for the radial collimator as described in any one of claims 1-7.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores program data that is used to perform the sampling measurement width calculation method for the radial collimator as described in any one of claims 1-7.

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