A method for obtaining a magnetic field curve of a non-uniform field

Abstract

An embodiment of the present application provides a method for obtaining a magnetic field curve of a non-uniform field. The method comprises: determining a magnetic field range of the non-uniform field; segmenting the non-uniform field into magnetic field segments based on the magnetic field range; determining a preset magnetic field strength for each magnetic field segment to form multiple preset magnetic field curves; and performing beam transport on the multiple preset magnetic field curves to determine an optimal magnetic field curve corresponding to the beam transport results. The method for obtaining a magnetic field curve of a non-uniform field of the embodiment of the present application is simple to operate.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic separation technology, and in particular to a method for obtaining a magnetic field curve of a non-uniform field. Background Art

[0002] Stable isotopes have been widely used in various fields, including defense, medicine, communications, and nuclear batteries. For example, Yb176 and SR88, precursor materials for radionuclides used in cancer diagnosis and treatment, and atomic clocks based on rubidium-87, are used in the Beidou satellite navigation system. The nickel-63 isotope is also used in the development of miniature nuclear batteries. However, the abundance of stable isotopes in nature is not very high. To achieve their application, they must be separated and prepared through various methods to increase their abundance.

[0003] The electromagnetic separation method is the most versatile method for separating stable isotopes. The advancement of its technology is directly related to whether it can produce stable isotopes with sufficient abundance and output. Today, military powers such as Russia and the United States use this method to produce large quantities of stable isotopes and sell them internationally. The implementation of the electromagnetic separation method requires an electromagnetic separator. In the design of the electromagnetic separator, the quality of the magnetic field directly affects the beam transport trajectory of the particles, thereby affecting the quality of the separation effect. Therefore, it is necessary to form a corresponding magnetic field intensity and magnetic field curve (i.e., magnetic field field type). Since the magnetic field intensity can be increased accordingly by simply increasing the ampere-turns of the excitation coil, the most difficult indicator to design is the magnetic field curve. The design of the magnetic field curve directly determines the quality of the beam transport separation ability of the final electromagnetic separator. However, the acquisition method of the magnetic field curve in the related art is complicated. Summary of the Invention

[0004] In view of this, the main purpose of the embodiments of the present application is to provide a method for acquiring a magnetic field curve of a non-uniform field with simple operation.

[0005] To achieve the above objectives, the technical solution of the embodiment of the present application is implemented as follows:

[0006] An embodiment of the present application provides a method for obtaining a magnetic field curve of a non-uniform field, the method comprising:

[0007] determining a magnetic field range of the non-uniform field;

[0008] According to the magnetic field range, the non-uniform field is segmented to form magnetic field segments;

[0009] determining a preset magnetic field strength of each of the magnetic field segments to form a plurality of preset magnetic field curves;

[0010] Beam transport is performed on the plurality of preset magnetic field curves to determine an optimal magnetic field curve corresponding to the beam transport result.

[0011] In one embodiment, determining the magnetic field range of the non-uniform field specifically includes:

[0012] Determine the deflection radius of isotope particles;

[0013] The magnetic field range of the non-uniform field is determined according to the deflection radius.

[0014] In one embodiment, the magnetic field range is equal to the sum of the deflection radius, the image width of the isotope, and a set margin.

[0015] In one embodiment, the acquisition method includes:

[0016] Dividing the non-uniform field into N magnetic field segments to obtain N+1 magnetic field control nodes; wherein the magnetic field control nodes are control nodes at both ends of each magnetic field segment;

[0017] The preset magnetic field strength of each magnetic field control node is determined to form a plurality of the preset magnetic field curves.

[0018] In one embodiment, determining the preset magnetic field strength of each magnetic field control node to form a plurality of preset magnetic field curves specifically includes:

[0019] The preset magnetic field strength of each magnetic field control node is controlled to change within a corresponding set variation range, and the preset magnetic field strength of each magnetic field control node is arranged and combined to fit and form a plurality of the preset magnetic field curves.

[0020] In one embodiment, the setting variation range corresponding to each of the magnetic field control nodes is the same; and / or,

[0021] The preset magnetic field strength of each magnetic field control node has the same change step length within the set change range.

[0022] In one embodiment, the preset magnetic field curve is fitted by linear interpolation fitting or spline curve fitting.

[0023] In one embodiment, the beam transport result includes the size of the isotope image width.

[0024] In one embodiment, a beam transport simulation is performed on the plurality of preset magnetic field curves by a beam transport system.

[0025] In one embodiment, the optimal magnetic field curve is the preset magnetic field curve corresponding to the minimum image width.

[0026] An embodiment of the present application provides a method for acquiring a magnetic field curve of a non-uniform field, the acquisition method comprising: determining the magnetic field range of the non-uniform field; segmenting the non-uniform field to form magnetic field segments based on the magnetic field range; determining a preset magnetic field strength for each magnetic field segment to form a plurality of preset magnetic field curves; and performing beam transport on the plurality of preset magnetic field curves to determine an optimal magnetic field curve corresponding to the beam transport result. Thus, on the one hand, by dividing the non-uniform field into a plurality of magnetic field segments, the possibility of magnetic field variation is increased, and the accuracy of the magnetic field curve of the non-uniform field is improved. On the other hand, by performing beam transport on the plurality of preset magnetic field curves, the difficulty of acquiring the non-uniform magnetic field curve is reduced, and the optimal magnetic field curve can be obtained without excessive manual operation, thereby improving the separation effect of isotope particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a flow chart of a method for obtaining a magnetic field curve of a non-uniform field in the first embodiment of the present application;

[0028] Figure 2 A schematic diagram of a uniform field in the second embodiment of the present application;

[0029] Figure 3 for Figure 2 Schematic diagram of the separation of isotope particles in a medium uniform field. The arrows in the figure indicate that the isotope particle beam is not separated and the image is wide.

[0030] Figure 4 A schematic diagram of a poor non-uniform field in the third embodiment of the present application;

[0031] Figure 5 for Figure 4 Schematic diagram of the separation of isotope particles in a medium inhomogeneous field. The arrows in the figure indicate a situation where the isotope particle beam is not obvious and the image width is large.

[0032] Figure 6 Schematic diagram of the optimal non-uniform field in the fourth embodiment of the present application;

[0033] Figure 7 for Figure 6 Schematic diagram of the separation of isotope particles in a medium inhomogeneous field. The arrows in the figure indicate the situation where the isotope particle beam is obvious and the image width is small;

[0034] Figure 8 This is a schematic diagram of the optimal magnetic field curve fitting in the fifth embodiment of the present application;

[0035] Figure 9 This is an iterative flow chart for obtaining the optimal magnetic field curve in the sixth embodiment of the present application.

[0036] Description of Reference Numerals

[0037] 1. Magnetic field control node; 2. Magnetic field segment. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. The following embodiments are only used to more clearly illustrate the technical solutions of the present application and are therefore only used as examples and are not intended to limit the scope of protection of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0039] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In related technologies, particles are deflected in the vacuum chamber of an electromagnetic separator. According to the formula r = mv / bq, due to the different masses m between the isotopes, their deflection radius r will also vary accordingly, thereby separating the isotopes and increasing their abundance. However, due to different magnetic field types, the degree of particle separation also varies. Under a uniform field, the image width of the isotope receiving end is large, making it difficult to effectively separate the two isotopes. However, under a better non-uniform field, this can be greatly improved, and the image width will be greatly reduced. In addition, the quality of the non-uniform field directly affects the quality of the separation results. However, the acquisition of a non-uniform field is very complex and there are many variable factors, so it is impossible to manually determine the optimal solution.

[0041] An embodiment of the present application provides a method for obtaining a magnetic field curve of a non-uniform field, see Figures 1-9 , the acquisition method includes the following steps:

[0042] Step S1: Determine the magnetic field range of the non-uniform field.

[0043] Step S2: Divide the non-uniform field into segments to form magnetic field segments 2 according to the magnetic field range.

[0044] Step S3: determining the preset magnetic field strength of each magnetic field segment 2 to form a plurality of preset magnetic field curves.

[0045] Step S4: performing beam transport on the plurality of preset magnetic field curves to determine an optimal magnetic field curve corresponding to the beam transport result.

[0046] Specifically, an inhomogeneous field refers to a region where the strength and direction of the magnetic field are unevenly distributed in space.

[0047] The magnetic field range refers to the entire spatial region covered by the non-uniform magnetic field.

[0048] The magnetic field segment 2 refers to a partial region of the non-uniform magnetic field.

[0049] The number of magnetic field segments 2 is not limited. For example, the non-uniform field is divided into two segments to form two magnetic field segments 2. For another example, the non-uniform field is divided into N segments to form N magnetic field segments 2, where N is greater than or equal to 3.

[0050] The range of the magnetic field segment 2 is not limited. For example, the non-uniform field is divided into multiple magnetic field segments 2, and the magnetic field range of each magnetic field segment 2 is the same. For another example, the non-uniform field is divided into multiple magnetic field segments 2, and the magnetic field ranges of at least two magnetic field segments 2 are different.

[0051] Exemplarily, the non-uniform field is divided into N magnetic field segments 2 , obtaining N+1 magnetic field control nodes 1 ; wherein the magnetic field control nodes 1 are control nodes at both ends of each magnetic field segment 2 .

[0052] The preset magnetic field strength of each magnetic field control node 1 is determined to form a plurality of preset magnetic field curves.

[0053] Specifically, each magnetic field segment 2 has two magnetic field control nodes 1 along one direction, and two adjacent magnetic field segments 2 have a common magnetic field control node 1 .

[0054] The magnetic field control nodes 1 are control nodes at both ends of each magnetic field segment 2 , which means that the magnetic field segment 2 has two magnetic field boundaries along one direction, and the magnetic field control nodes 1 are the magnetic field boundaries of the magnetic field segment 2 .

[0055] The preset magnetic field strength corresponding to the magnetic field boundary is the magnetic field strength of the magnetic field control node 1 .

[0056] The magnetic field strength of each magnetic field control node 1 is fitted to obtain a preset magnetic field curve.

[0057] It is understandable that the more magnetic field segments 2 there are, that is, the more magnetic field control nodes 1 there are, the more preset magnetic field curves obtained by fitting are, and the more accurate the optimal magnetic field curve result obtained is.

[0058] The magnetic field curve refers to a magnetic field strength curve, that is, a curve obtained by fitting each magnetic field control node 1 , with the horizontal axis being the relative position of each magnetic field control node 1 and the vertical axis being the magnetic field strength corresponding to each magnetic field control node 1 .

[0059] By performing beam transport on each preset magnetic field curve obtained by fitting, that is, performing beam transport based on the non-uniform field determined by each preset magnetic field curve, the separation of isotope particles corresponding to each preset magnetic field curve is obtained. The preset magnetic field curve with the best particle separation effect is the optimal magnetic field curve.

[0060] It should be noted that the optimal magnetic field curve is not the best magnetic field curve in an absolute sense, but rather a preset magnetic field curve with the best particle separation effect among multiple preset magnetic field curves.

[0061] An embodiment of the present application provides a method for acquiring a magnetic field curve of a non-uniform field, the acquisition method comprising: determining the magnetic field range of the non-uniform field; segmenting the non-uniform field to form magnetic field segments 2 based on the magnetic field range; determining a preset magnetic field strength for each magnetic field segment 2 to form a plurality of preset magnetic field curves; and performing beam transport on the plurality of preset magnetic field curves to determine an optimal magnetic field curve corresponding to the beam transport result. Thus, on the one hand, by dividing the non-uniform field into a plurality of magnetic field segments 2, the possibility of magnetic field variation is increased, thereby improving the accuracy of the magnetic field curve of the non-uniform field. On the other hand, by performing beam transport on the plurality of preset magnetic field curves, the difficulty of acquiring the non-uniform magnetic field curve is reduced, and the optimal magnetic field curve can be obtained without requiring excessive manual operation, thereby improving the separation effect of isotope particles.

[0062] In one embodiment, please refer to Figure 1 , determine the magnetic field range of the non-uniform field, specifically including:

[0063] Determine the deflection radius of the isotope particles.

[0064] The magnetic field range of the non-uniform field is determined according to the deflection radius, thereby ensuring that the isotope particles are always within the magnetic field range of the non-uniform field during movement.

[0065] Specifically, the magnetic field range of the inhomogeneous field is larger than the deflection radius of the isotope particles.

[0066] In one embodiment, please refer to Figure 1 The magnetic field range is equal to the sum of the deflection radius, the image width of the isotope, and the set margin. This can avoid wasting resources due to an excessively large magnetic field range.

[0067] Specifically, the value of the margin is not limited and is determined according to actual conditions, as long as the isotope particles can move in the magnetic field and costs can be saved to a certain extent.

[0068] In one embodiment, please refer to Figure 1 , determining the preset magnetic field strength of each magnetic field control node 1 to form multiple preset magnetic field curves, specifically including:

[0069] The preset magnetic field strength of each magnetic field control node 1 is controlled to vary within a corresponding set range, and the preset magnetic field strengths of each magnetic field control node 1 are permuted and combined to form a plurality of preset magnetic field curves. Thus, on the one hand, by controlling the preset magnetic field strength to vary within a set range, the magnetic field characteristics can be flexibly adjusted to suit different application requirements. On the other hand, by permuting and combining the magnetic field control nodes 1 and fitting to form a plurality of preset magnetic field curves, the magnetic field design can be optimized and system performance can be improved.

[0070] Specifically, the preset magnetic field strength refers to a pre-set magnetic field strength when determining a non-uniform field, which is used to form a desired magnetic field environment or effect.

[0071] The set variation range refers to the interval within which the preset magnetic field strength of the magnetic field control node 1 is allowed to vary.

[0072] It is understandable that the setting range varies according to different application requirements to ensure that the magnetic field strength can meet specific experimental or working conditions.

[0073] The preset magnetic field strength of each magnetic field control node 1 has no limit on the variation range.

[0074] For example, the setting variation range corresponding to each magnetic field control node 1 is the same.

[0075] For another example, the setting change range corresponding to each magnetic field control node 1 is different.

[0076] The change range of each magnetic field control node 1 within the set change range is not limited.

[0077] For example, each magnetic field control node 1 changes uniformly within a set change range, that is, the preset magnetic field strength of each magnetic field control node changes in the same step size within the set change range.

[0078] For another example, each magnetic field control node 1 changes non-uniformly within the set change range, that is, the preset magnetic field strength of each magnetic field control node 1 has a different change step size within the set change range.

[0079] The fitting method of the preset magnetic field curve formed by fitting each magnetic field control node 1 is not limited.

[0080] For example, see Figure 8 The default magnetic field curve fitting method is linear interpolation fitting or spline curve fitting. This can improve the fitting accuracy and make the magnetic field curve more accurate.

[0081] In one embodiment, please refer to Figure 2-Figure 7 The beam transport result includes the size of the isotope image width. Therefore, by comparing the size of the isotope image width after beam transport of each preset magnetic field curve, the preset magnetic field curve with the best isotope separation effect can be obtained.

[0082] In one embodiment, please refer to Figure 1 The beam transport system simulates multiple preset magnetic field curves. This reduces the difficulty of manually obtaining non-uniform magnetic field curves and allows the optimal magnetic field curve to be obtained without excessive manual operation.

[0083] In one embodiment, please refer to Figure 6 and Figure 7 The optimal magnetic field curve is the preset magnetic field curve corresponding to the minimum image width. Thus, by obtaining the optimal magnetic field curve, the isotope particles can achieve a better separation effect.

[0084] In a specific embodiment, please refer to Figure 1 and Figure 9 , the method for obtaining the magnetic field curve of the non-uniform field includes:

[0085] The deflection radius of the isotope particles is determined to determine the magnetic field range of the non-uniform field. The magnetic field range is the sum of the deflection radius of the isotope particles, the image width of the isotope, and the set margin.

[0086] The magnetic field range is evenly divided into N magnetic field segments 2 to obtain N+1 magnetic field control nodes 1 .

[0087] The magnetic field strength variation range is preset according to the magnetic field design index. For example, the magnetic field variation range is changed from 2000GS to 3000GS.

[0088] The step size of the preset magnetic field strength of magnetic field control node 1 within the magnetic field variation range is set. For example, the step size of the variation of magnetic field control node 1 is 100 GS. As a result, magnetic field control node 1 has 10 variations within the preset magnetic field strength variation range. For example, the magnetic field strength of each magnetic field control node 1 is 2100 GS, 2200 GS, 2300 GS, 2400 GS, 2500 GS, 2600 GS, 2700 GS, 2800 GS, 2900 GS, or 3000 GS.

[0089] The magnetic field control nodes 1 are arranged and combined, and a preset magnetic field curve corresponding to the corresponding magnetic field control node 1 is fitted by a linear interpolation fitting or a spline curve fitting method.

[0090] By setting up the program and performing parametric simulation, each preset magnetic field curve is substituted into the beam transport simulation software to perform simulation calculations of beam transport. The beam transport simulation software can automatically compare the image width of isotope particles under each preset magnetic field curve.

[0091] The preset magnetic field curve when the isotope particle image width is the smallest is determined to be the optimal magnetic field curve.

[0092] Thus, by setting up multiple magnetic field control nodes 1 to fit and form a preset magnetic field curve, and through parametric simulation methods, the complex process of manually designing the magnetic field curve is mathematically and automatically processed, greatly reducing the difficulty of obtaining a non-uniform magnetic field. In addition, the optimal magnetic field curve is obtained by comparing the beam transport results of each preset magnetic field curve, solving the difficult problem of whether the magnetic field curve is the optimal curve. This provides new ideas and solutions for the design of non-uniform magnetic fields, provides guarantees for beam transport, and is conducive to significantly improving the separation effect in electromagnetic separators.

[0093] In the description of this application, the descriptions with reference to the terms "in one embodiment", "in some embodiments", "in a specific embodiment", or "exemplary" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine different embodiments or examples described in this application and features of different embodiments or examples without contradiction.

[0094] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application are intended to be within the scope of protection of the present application.

Claims

1. A method for obtaining a magnetic field curve of a non-uniform field, characterized in that: The acquisition method includes: determining a magnetic field range of the non-uniform field; According to the magnetic field range, the non-uniform field is segmented to form magnetic field segments; determining a preset magnetic field strength of each of the magnetic field segments to form a plurality of preset magnetic field curves; Beam transport is performed on the plurality of preset magnetic field curves to determine an optimal magnetic field curve corresponding to the beam transport result.

2. The method for obtaining a magnetic field curve of a non-uniform field according to claim 1, characterized in that: Determining the magnetic field range of the non-uniform field specifically includes: Determine the deflection radius of isotope particles; The magnetic field range of the non-uniform field is determined according to the deflection radius.

3. The method for obtaining a magnetic field curve of a non-uniform field according to claim 2, characterized in that: The magnetic field range is equal to the sum of the deflection radius, the image width of the isotope, and a setting margin.

4. The method for obtaining a magnetic field curve of a non-uniform field according to any one of claims 1 to 3, characterized in that: The acquisition method includes: Dividing the non-uniform field into N magnetic field segments to obtain N+1 magnetic field control nodes; wherein the magnetic field control nodes are control nodes at both ends of each magnetic field segment; The preset magnetic field strength of each magnetic field control node is determined to form a plurality of the preset magnetic field curves.

5. The method for obtaining a magnetic field curve of a non-uniform field according to claim 4, characterized in that: The determining of the preset magnetic field strength of each magnetic field control node to form a plurality of the preset magnetic field curves specifically includes: The preset magnetic field strength of each magnetic field control node is controlled to change within a corresponding set variation range, and the preset magnetic field strength of each magnetic field control node is arranged and combined to fit and form a plurality of the preset magnetic field curves.

6. The method for obtaining a magnetic field curve of a non-uniform field according to claim 5, characterized in that: The setting variation range corresponding to each of the magnetic field control nodes is the same; and / or, The preset magnetic field strength of each magnetic field control node has the same change step length within the set change range.

7. The method for obtaining a magnetic field curve of a non-uniform field according to claim 5, characterized in that: The fitting method of the preset magnetic field curve is linear interpolation fitting or spline curve fitting.

8. The method for obtaining a magnetic field curve of a non-uniform field according to claim 1, characterized in that: The beam transport result includes the size of the isotope image width.

9. The method for obtaining a magnetic field curve of a non-uniform field according to claim 8, characterized in that: A beam transport simulation is performed on the plurality of preset magnetic field curves through a beam transport system.

10. The method for obtaining a magnetic field curve of a non-uniform field according to claim 8, characterized in that: The optimal magnetic field curve is the preset magnetic field curve corresponding to the minimum image width.

Images