CN212365635U - Multi-dimensional vector field magnet structure - Google Patents
Multi-dimensional vector field magnet structure Download PDFInfo
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- CN212365635U CN212365635U CN202020825250.XU CN202020825250U CN212365635U CN 212365635 U CN212365635 U CN 212365635U CN 202020825250 U CN202020825250 U CN 202020825250U CN 212365635 U CN212365635 U CN 212365635U
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Abstract
The utility model relates to a multi-dimensional vector field magnet structure, which comprises a first coil, a second coil and/or a third coil; the first coil adopts one or more layers of CCT dipolar coils, and the single-layer CCT coil generates a vector magnetic field which has components in the X direction and the Z direction simultaneously in the aperture area of the magnet; the second coil adopts one or more layers of CCT dipolar coils, and the single-layer CCT coil generates a vector magnetic field with components in the Y direction and the Z direction at the same time in the aperture area of the magnet; the third coil adopts one or more conventional coils, and a single conventional coil generates a vector magnetic field distributed along the Z axis in the aperture area of the magnet; the Z axis is assumed to be the central axis direction of the CCT dipolar coil, and the X axis and the Y axis are respectively the polar head directions corresponding to the CCT dipolar coil and the CCT dipolar coil.
Description
Technical Field
The utility model relates to a novel superconducting magnet structure, in particular to a multidimensional vector field magnet structure based on an oblique solenoid type (pipe-Cosin-Theta, CCT for short).
Background
The vector magnet has important application in scientific research, the development of physical, biological, material and other subjects can be effectively promoted by utilizing a magnetic field technology, and the vector magnet can provide good experimental conditions for the vector magnet. The positioning research can be carried out by utilizing a two-dimensional or three-dimensional vector magnet, and the possibility is provided for more complex experiments, such as the research on the anisotropy, the Hall effect, the single electron tunneling effect and the like of materials. For experimental research which needs magnetic field in any direction in space, there are two ways to realize: the direction of the fixed magnetic field + the rotation of the sample, and the direction of the fixed sample + the rotation of the magnetic field. The vector field magnet is a magnet capable of generating a rotating magnetic field, a mechanical structure is not needed to rotate a sample, the size of the magnetic field and the angle relative to the sample are adjusted, the complexity of a vector field application platform is greatly simplified, and the vector field magnet is convenient for commercial popularization.
Vector field magnets achieve rotation of the direction of the magnetic field by controlling the current rather than mechanical operation, which offers many possibilities for experimentation. The vector field magnet generates magnetic field components in any direction at any position in space and in a plane, and the coil structure used by the vector field magnet in the current market is commonly a solenoid coil, a runway coil or a saddle coil and the like as shown in figures 1 and 2. Due to the above-mentioned limitations of the coil's own characteristics, the magnet is oversized for large-sized samples.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model aims at providing a compact structure, good field area scope is big and the high multidimensional vector field magnet structure of degree of consistency.
In order to solve the above problem, the utility model discloses a technical scheme be: a multi-dimensional vector field magnet structure comprising a first coil, a second coil and/or a third coil;
the first coil adopts one or more layers of CCT dipolar coils, and the single-layer CCT coil generates a vector magnetic field which has components in the X direction and the Z direction simultaneously in the aperture area of the magnet;
the second coil adopts one or more layers of CCT dipolar coils, and the single-layer CCT coil generates a vector magnetic field with components in the Y direction and the Z direction at the same time in the aperture area of the magnet;
the third coil adopts one or more conventional coils, and a single conventional coil generates a vector magnetic field distributed along the Z axis in the aperture area of the magnet;
the Z axis is the central axis direction of the CCT dipolar coil, and the X axis and the Y axis are the polar head directions corresponding to the CCT dipolar coils of the first coil and the second coil respectively.
Further, the first coil, the second coil and/or the third coil are assembled in any order, namely the three coils are combined to generate a required space vector magnetic field in the aperture area of the magnet; in addition, any two of the first coil, the second coil and the third coil are combined to generate a two-dimensional vector magnetic field in the aperture area of the magnet.
Further, the multi-layer CCT coils are connected in series, and when the multi-layer CCT coils are even layers:
the inclination angles are alternated, and only one dipolar vector magnetic field of the enhanced plate distributed along the X-axis or Y-axis direction is generated in the aperture area of the magnet;
the inclination angles are in the same direction, and a CCT vector magnetic field of the enhanced version which forms a preset included angle direction with the central axis is generated in the aperture area of the magnet;
further, the multi-layer CCT coils are connected in series, and the multi-layer CCT coils are odd layers:
the inclination angles are alternated, and a vector magnetic field which simultaneously has an X-axis component or a Y-axis component and a Z-axis component and is different from the Bctc direction is generated in the magnet aperture area, wherein the Bctc is the vector magnetic field generated by single-layer CCT;
the inclination angles are in the same direction, and a CCT vector magnetic field of the enhanced version which forms a preset included angle direction with the central axis is generated in the aperture area of the magnet.
Further, the third coil is a solenoid coil, a runway-type coil or a saddle-type coil.
Further, the single-layer CCT coil structure comprises a series of single-turn inclined spiral coils with a period continuously distributed, the inclined spiral coils are solidified on the cylindrical framework to form an inclined solenoid magnet structure, and the plurality of layers of inclined solenoid coils are connected in series with one another.
Further, the CCT single-layer coil parameter equation is as follows:
wherein, R refers to the radius of the coil, theta refers to the azimuth angle in the circumferential direction, w refers to the turn interval, and alpha refers to the inclination angle of the coil and the midplane.
Further, the first coil, the second coil and/or the third coil are made of superconducting cables.
The utility model discloses owing to take above technical scheme, it has following advantage:
1. the utility model can adopt CCT coil and/or conventional coil structure to form vector field magnet, the component of current density Z of cross section of the coincidence section of CCT coil approximately satisfies Cosine Theta distribution, and can generate high-quality dipolar field in aperture area, and has the characteristics of compact structure, large good field area, high resolution, and cylinder-like structure easy to integrate;
2. the CCT magnet coil of the utility model has novel and light structure, the vector magnet structure adopts the superconducting technology to realize the rotation of high magnetic field and three-dimensional full-space equal-mode magnetic field, and is particularly suitable for the scientific research field with high precision and large sample vector field requirement;
to sum up, the utility model discloses a CCT magnet structure mechanical properties is superior, is applicable to low field, high place and has the operating mode.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Like reference numerals refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic diagram of a prior art three-dimensional vector magnet based on a Helmholtz coil structure;
fig. 2 is a view of a conventional dipolar field magnet of a coil structure, in which (1) is a solenoid coil, (2) is a racetrack-type coil, and (3) is a saddle-type coil;
fig. 3 is a schematic diagram of a CCT two-pole coil structure of the first coil in this embodiment, wherein (1) a single-layer CCT coil (odd number) generates vector magnetic fields distributed along the X-axis and the Z-axis in the aperture of the magnet; (2) double-layer CCT coils (even inclination angles are alternated) generate vector magnetic fields distributed along an X axis in the aperture of the magnet, and the vector magnetic fields distributed along a Z axis are offset;
fig. 4 is a schematic diagram of a CCT two-pole coil structure of the second coil in this embodiment, in which (1) a single-layer CCT coil (odd number) generates vector magnetic fields distributed along the Y-axis and the Z-axis in the aperture of the magnet; (2) double-layer CCT coils (even inclination angles are alternated) generate vector magnetic fields distributed along the Y axis in the aperture of the magnet, and the vector magnetic fields distributed along the Z axis are offset;
FIG. 5 is a schematic diagram of the resultant vector magnetic field of the vector magnet composed of the first coil (single-layer CCT) and the third coil in the inner hole region;
fig. 6 is a schematic diagram of a three-dimensional vector field magnet structure based on a CCT coil structure according to this embodiment, where (1) is a first coil, (2) is a second coil, and (3) is a third coil, the schematic diagram only takes a single-layer coil as an example, the combination sequence of three groups of coils is arbitrary, and the number of layers of each group of coils is a single layer or multiple layers.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inboard", "outboard", "below", "upper" and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
In this embodiment, the XYZ coordinate system may be a cartesian right-hand coordinate system or a cartesian left-hand coordinate system, in which the Z axis is assumed to be a central axis direction of the CCT diode frame cylinder and is also a direction in which the sample is placed along the length position, the direction of the pole head of the CCT diode is a Y axis, and the direction perpendicular to the Z axis on the median plane of the CCT diode is an X axis. Of course, for convenience of description, the X axis, the Y axis and the Z axis of the present embodiment are only set forth as distinctively three coordinate axes, and should not be limited by the above names in practical use, and the names of the coordinate axes may be defined according to practical needs.
As shown in fig. 3 to 5, the multi-dimensional vector magnet structure provided by the present embodiment includes a first coil 1, a second coil 2 and/or a third coil 3;
as shown in fig. 3, the first coil 1 adopts one or more layers of CCT dipolar coils, the single-layer CCT dipolar coil generates a vector magnetic field having components in both X direction and Z direction in the magnet aperture area, and the multiple layers of CCT dipolar coils are used to increase the magnitude of the required magnetic field component; in use, the first coil 1 may be located at the innermost side of the multi-dimensional vector magnet structure for generating a Bcct vector magnetic field having an X-axis component, for example, but not limited thereto.
As shown in fig. 4, the second coil 2 adopts one or more layers of CCT dipolar coils, the single-layer CCT dipolar coil generates a vector magnetic field having components in both Y direction and Z direction in the magnet aperture area, and the multi-layer CCT dipolar coil is used to increase the magnitude of the required magnetic field component; in use, the second coil 2 may be placed outside the first coil 1 for generating a Bcct vector magnetic field having a Y-axis component.
As shown in fig. 6, the third coil 3 adopts one or more conventional coil structures, a single conventional coil generates a vector magnetic field distributed along the Z-axis in the aperture area of the magnet, and a plurality of conventional coils are used for improving the size and uniformity of the magnetic field; in this example, the Z axis is a central axis direction of the CCT coil bobbin, the first coil is illustrated in fig. 3, the Y axis is an initial axis of the azimuth angle θ, the X axis is a direction perpendicular to the Y axis and the Z axis, and is also a direction in which the pole head of the CCT dipolar magnet is located, and similarly, the second coil 2 is different in that the X axis is defined as the initial axis of the azimuth angle θ, that is, the Y axis is a direction in which the pole head is located, and can also be obtained by rotating the first coil by 90 ° along the Z axis.
The third coil 3 is used for generating a Bz vector magnetic field distributed along the Z-axis direction in the inner hole area of the magnet.
The utility model discloses an in some embodiments, first coil 1, second coil 2 and/or 3 assembly sequences of third coil are arbitrary, and three coils produce the vector magnetic field that has X axle, Y axle and Z axle direction component respectively promptly, and the final required space vector magnetic field of synthesizing of the total component Bx, By and the Bz of three direction. For example: the third coil 3 can be sleeved outside the first coil 1 and the second coil 2 in a spatial structure, as shown in fig. 5, a vector magnet formed by the first coil 1, the second coil 2 and the third coil 3 is a three-dimensional vector magnet, and the three coils are combined in a magnet aperture area to generate a required spatial vector magnetic field. The first coil 1, the second coil 2 and the third coil 3 can also be combined in pairs at will to generate a two-dimensional vector magnetic field in the aperture area of the magnet.
The utility model discloses an in some embodiments, use first coil 1 to explain in detail as the example, second coil 2 is similar with first coil 1, does not describe repeatedly.
As shown in fig. 3 to 4, the multi-layer CCT coils of the first coil 1 are odd-numbered layers, and the vector magnetic fields generated in the magnet aperture area by the odd-numbered CCT coils in the alternating inclination angles or in the same inclination angle direction are shown in table 1;
when the plurality of CCT coils of the first coil 1 are even-numbered, the vector magnetic fields generated in the aperture region of the magnet by the alternate inclination angles or the same inclination angles of the CCT coils of the even-numbered layers are as shown in table 1:
TABLE 1
| CCT coil | Inclination angle homodromous | Alternating dip angle |
| Even number of layers | Enhanced version Bx + enhanced version Bz (i.e., enhanced version B)cct) | Enhanced type Bx (Bz nearly offset) |
| Odd number of layers | Enhanced version Bx + enhanced version Bz (i.e., enhanced version B)cct) | Enhanced version Bx + Bz (n-1 layers Bz all offset) |
Note: bx (Bz) is the component of vector magnetic field Bctct generated by single-layer CCT in X (Z) direction, the enhanced version means that n layers of CCT respectively generate corresponding Bctct, and each layer corresponds to the component of Bctct: the resultant components with the same direction are approximately equal to n times of Bx (Bz) in value, and the situation can be regarded as functional enhancement of the corresponding field component of the single-layer CCT coil; the oppositely directed resultant components will cancel each other out in value, with the effect that there will be only some of the field components in the inner hole region that are not cancelled out.
As shown in fig. 5, the direction of the enhanced version Bcct is a predetermined angular direction from the central axis, so that in combination with other coil types, a special-shaped vector magnet suitable for specific physical requirements can be produced.
In some embodiments of the present invention, the third coil 3 is a solenoid coil, a runway coil, or a saddle coil.
The utility model discloses an in some embodiments, CCT dipolar single-layer coil structure includes a series of periodic distribution's single turn slope spiral coil, and slope spiral coil solidification forms oblique solenoid magnet structure on the cylinder skeleton, and the series connection each other between the multilayer slope solenoid coil, slope solenoid winding space orbit is confirmed through a set of parametric equation, and CCT single-layer coil parametric equation is:
wherein, R refers to the radius of the coil, θ refers to the azimuth angle in the circumferential direction, w refers to the turn pitch, α refers to the inclination angle between the coil and the midplane (such as the XZ plane in fig. 3), and the CCT coils in different layers have different R.
In some embodiments of the present invention, the first coil 1, the second coil 2 and/or the third coil 3 are all made of superconducting cable, and the superconducting cable may be NbTi or Nb3Sn, etc., and the examples are not limited thereto.
The utility model discloses an in some embodiments, first coil 1, second coil 2 and third coil 3 can supply power alone respectively, and the user obtains the vector magnetic field of required size, direction according to the manual data control power of test calibration, also can obtain required magnetic field through sensor closed-loop control.
The utility model discloses an in some embodiments, same support chassis can be shared to first coil 1, second coil 2 and third coil 3, also can separate separately, assembles into the vector magnet at last, and the concrete structure of support chassis does not do the injeciton, can adopt corresponding structure according to actual conditions.
Above-mentioned each embodiment only is used for explaining the utility model discloses, wherein structure, connected mode and the preparation technology etc. of each part all can change to some extent, all are in the utility model discloses equal transform and improvement of going on technical scheme's the basis all should not exclude outside the protection scope of the utility model.
Claims (8)
1. A multi-dimensional vector field magnet structure, characterized in that the structure comprises a first coil, a second coil and/or a third coil;
the first coil adopts one or more layers of CCT dipolar coils, and the single-layer CCT coil generates a vector magnetic field which has components in the X direction and the Z direction simultaneously in the aperture area of the magnet;
the second coil adopts one or more layers of CCT dipolar coils, and the single-layer CCT coil generates a vector magnetic field with components in the Y direction and the Z direction at the same time in the aperture area of the magnet;
the third coil adopts one or more coils, and a single coil generates a vector magnetic field distributed along the Z axis in the aperture area of the magnet;
the Z axis is the central axis direction of the CCT dipolar coil, and the X axis and the Y axis are the polar head directions corresponding to the CCT dipolar coils of the first coil and the second coil respectively.
2. The multi-dimensional vector field magnet structure according to claim 1, wherein the first coil, the second coil and/or the third coil are assembled in any order, i.e. three coils in combination generate a desired space vector magnetic field in the magnet aperture area; in addition, any two of the first coil, the second coil and the third coil are combined to generate a two-dimensional vector magnetic field in the aperture area of the magnet.
3. The multi-dimensional vector field magnet structure of claim 1,
the multi-layer CCT coils are connected in series, and when the multi-layer CCT coils are even layers:
the inclination angles are alternated, and only one dipolar vector magnetic field of the enhanced plate distributed along the X axis or the Y axis is generated in the aperture area of the magnet;
the inclination angles are in the same direction, and a CCT vector magnetic field of the enhanced version which forms a preset included angle direction with the central axis is generated in the aperture area of the magnet.
4. The multi-dimensional vector field magnet structure of claim 1,
the multi-layer CCT coils are connected in series, and the multi-layer CCT coils are odd layers:
the inclination angles are alternated, and a vector magnetic field which simultaneously has an X-axis component or a Y-axis component and a Z-axis component and is different from the Bctc direction is generated in the magnet aperture area, wherein the Bctc is the vector magnetic field generated by single-layer CCT;
the inclination angles are in the same direction, and a CCT vector magnetic field of the enhanced version which forms a preset included angle direction with the central axis is generated in the aperture area of the magnet.
5. A multi-dimensional vector field magnet structure according to any of claims 1 to 4, wherein the third coil is a solenoid coil, a racetrack coil or a saddle coil.
6. A multi-dimensional vector field magnet structure according to any of claims 1 to 4, wherein the single layer CCT coil structure comprises a series of single turn oblique helical coils with a period continuously distributed, the oblique helical coils being consolidated on a cylindrical skeleton to form an oblique solenoidal magnet structure, the multiple layers of oblique solenoidal coils being connected in series with each other.
7. The multi-dimensional vector field magnet structure of claim 6, wherein the CCT single layer coil parameter equation is:
wherein the content of the first and second substances,Rrefers to the radius of the coil,θrefers to the azimuth angle in the circumferential direction,wrefers to the distance between the turns,αrefers to the angle of inclination of the coil to the midplane.
8. A multi-dimensional vector field magnet structure according to any of claims 1 to 4, wherein the first, second and/or third coils are made of superconducting wire.
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| CN202020825250.XU CN212365635U (en) | 2020-05-18 | 2020-05-18 | Multi-dimensional vector field magnet structure |
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| CN202020825250.XU CN212365635U (en) | 2020-05-18 | 2020-05-18 | Multi-dimensional vector field magnet structure |
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