Method for acquiring magnetic field curve of non-uniform field

Abstract

The embodiment of the invention provides an acquisition method of a magnetic field curve of a non-uniform field. The acquisition method comprises the following steps: determining a magnetic field range of the non-uniform field; segmenting the non-uniform field according to the magnetic field range to form magnetic field segments; determining the preset magnetic field intensity of each magnetic field section to form a plurality of preset magnetic field curves; and carrying out beam transportation on the plurality of preset magnetic field curves to determine an optimal magnetic field curve corresponding to a beam transportation result. The method for acquiring the magnetic field curve of the non-uniform field 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 acquiring a magnetic field curve of a non-uniform field. Background Art

[0002] Stable isotopes have been widely used in defense, military, medicine, communications, nuclear batteries and other fields. For example, the precursor materials of radionuclides Yb176 and sr88 for diagnosis and treatment of cancer, the atomic clock with rubidium 87 as the core has been used in the Beidou satellite navigation system, and the nickel 63 isotope has also been used in the research and development of micro-nuclear batteries. However, the abundance of stable isotopes in nature is not very high, and if stable isotopes are to be used accordingly, they must be separated and prepared by 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 stable isotopes with sufficient abundance and output can be produced. 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 separation effect. Therefore, it is necessary to form a corresponding magnetic field intensity and a magnetic field curve (i.e., a magnetic field type). Since the magnetic field intensity only needs to increase the number of ampere-turns of the excitation coil to increase accordingly, 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 to operate. 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 purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0006] The 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, segmenting the non-uniform field 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 implementation, 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] Divide 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 preset magnetic field curves.

[0018] In one embodiment, 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:

[0019] The preset magnetic field strength of each magnetic field control node is controlled to change within a corresponding set change 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 implementation, the setting variation ranges corresponding to the magnetic field control nodes are the same; and / or,

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

[0022] In one implementation, 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 image width of the isotope.

[0024] In one implementation, a beam transport system is used to perform beam transport simulation on a plurality of the preset magnetic field curves.

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

[0026] The embodiment of the present application provides a method for acquiring a magnetic field curve of a non-uniform field, and the acquisition method includes: determining the magnetic field range of the non-uniform field; segmenting the non-uniform field to form magnetic field segments according to the magnetic field range; determining the preset magnetic field strength of each magnetic field segment to form a plurality of preset magnetic field curves; performing beam transport on the plurality of preset magnetic field curves to determine the 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 changes 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 a 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 too much 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 acquiring 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 show 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 non-uniform field. The arrows in the figure show that the isotope particle beam is not obvious and the image width is large;

[0032] Figure 6 This is a schematic diagram of an 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 non-uniform field. The arrows in the figure show that 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] Fig. 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 scheme and advantages of the embodiments of the present application clearer, the technical scheme 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 scheme of the present application, and are therefore only used as examples, and the protection scope of the present application cannot be limited by this. 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] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the related art, 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 isotopes, the deflection radius r will also be different, so the isotopes can be separated and their abundance can be increased. However, due to the different magnetic field types, the degree to which the particles are separated is also different. Under a uniform field, the image width of the isotope receiving end is large, and it is difficult to effectively separate the two isotopes. However, under a better non-uniform field, it 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 result. However, the acquisition of the non-uniform field is very complicated and there are many variable factors, so it is impossible to artificially give the optimal solution.

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

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

[0043] Step S2: According to the magnetic field range, the non-uniform field is segmented to form magnetic field segment 2.

[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 a 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 not uniformly 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 a plurality of 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 a plurality of 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 to obtain 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 can be understood 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 thus the optimal magnetic field curve result obtained is more accurate.

[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, and 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 a preset magnetic field curve with the best particle separation effect among multiple preset magnetic field curves.

[0061] The embodiment of the present application provides a method for acquiring a magnetic field curve of a non-uniform field, and the acquisition method includes: determining the magnetic field range of the non-uniform field; segmenting the non-uniform field to form a magnetic field segment 2 according to the magnetic field range; determining the preset magnetic field strength of each magnetic field segment 2 to form a plurality of preset magnetic field curves; performing beam transport on the plurality of preset magnetic field curves to determine the 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 change 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 a 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 too much 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, 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 located 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 setting margin. In this way, it is possible to 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 the cost 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 a plurality of preset magnetic field curves, specifically including:

[0069] The preset magnetic field strength of each magnetic field control node 1 is controlled to change within a corresponding set variation range, and the preset magnetic field strength of each magnetic field control node 1 is arranged and combined to fit to form a plurality of preset magnetic field curves. Thus, on the one hand, by controlling the preset magnetic field strength to change within a set variation range, the magnetic field characteristics can be flexibly adjusted to meet different application requirements. On the other hand, by arranging 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 the system performance can be improved.

[0070] Specifically, the preset magnetic field strength refers to a magnetic field strength that is preset when determining a non-uniform field, and 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 variation range of each magnetic field control node 1 is not limited.

[0074] For example, the setting variation ranges corresponding to the magnetic field control nodes 1 are the same.

[0075] For another example, the setting variation ranges corresponding to the magnetic field control nodes 1 are different.

[0076] The variation range of each magnetic field control node 1 within the set variation 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 has the same change step length within the set change range.

[0078] For another example, each magnetic field control node 1 changes non-uniformly within a set change range, that is, the preset magnetic field strength of each magnetic field control node 1 has a different change step length 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 fitting method of the preset magnetic field curve is linear interpolation fitting or spline curve fitting. Thus, the fitting accuracy can be improved, making 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 sizes of the isotope image widths 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 , beam transport simulation is performed on multiple preset magnetic field curves through the beam transport system. As a result, the difficulty of manually obtaining non-uniform magnetic field curves is reduced, and the optimal magnetic field curve can be obtained without too much 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 obtain a better separation effect.

[0084] In a specific embodiment, please refer to Figure 1 and Fig. 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, and 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 change step of the preset magnetic field strength of the magnetic field control node 1 within the magnetic field change range is set. For example, the step length of the change step of the magnetic field control node 1 is 100GS. Thus, the magnetic field control node 1 has 10 change conditions within the preset magnetic field strength change range, for example, the magnetic field strength of each magnetic field control node 1 is 2100GS, 2200GS, 2300GS, 2400GS, 2500GS, 2600GS, 2700GS, 2800GS, 2900GS or 3000GS.

[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] Therefore, a preset magnetic field curve is formed by fitting by setting multiple magnetic field control nodes 1, and the complex process of manually designing the magnetic field curve is mathematically and automatically processed through the parametric simulation method, which greatly reduces the difficulty of obtaining the 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, which solves the problem of whether the magnetic field curve is the optimal curve, proposes new ideas and solutions for the design of non-uniform magnetic fields, provides a guarantee for beam transport, and is conducive to a substantial improvement in the separation effect in the electromagnetic separator.

[0093] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in a specific embodiment", or "exemplary" etc. means 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 the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0094] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope 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 comprises: determining a magnetic field range of the non-uniform field; According to the magnetic field range, segmenting the non-uniform field 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 comprises: Divide 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 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 of the magnetic field control nodes 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 change 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 ranges corresponding to the magnetic field control nodes are the same; and / or, The preset magnetic field strength of each of the magnetic field control nodes 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 image width of the isotope.

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

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.

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