CN115692013B - Axial strengthening device of high-field pulse magnet - Google Patents
Axial strengthening device of high-field pulse magnetInfo
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- CN115692013B CN115692013B CN202211426668.3A CN202211426668A CN115692013B CN 115692013 B CN115692013 B CN 115692013B CN 202211426668 A CN202211426668 A CN 202211426668A CN 115692013 B CN115692013 B CN 115692013B
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Abstract
本发明公开了一种高场脉冲磁体的轴向加固装置，属于脉冲强磁场技术领域；该加固装置包括端部组件和内固定组件；其中，端部组件包括两个平行的端板，其与脉冲磁体线圈径向平面平行，分别布置在脉冲磁体线圈两端；内固定组件与端部组件的端板垂直，其主体布置在端部组件的两个端板之间，位于磁体线圈内部会出现线圈层间自由分离的界面位置。在磁体线圈绕制或装配到预定步骤后，布置内固定组件，将端部组件的两个端板夹紧，为端板提供额外轴向预紧力；本发明能有效减小磁体线圈绕制或装配过程中因线圈所受环向预紧力导致的线圈匝间轴向间隙，进而减小了磁体放电时磁体端部线圈与端板之间的轴向间隙，提高了磁体使用寿命。
The present invention discloses an axial reinforcement device for a high-field pulse magnet, which belongs to the field of pulsed high magnetic field technology; the reinforcement device includes an end assembly and an internal fixing assembly; wherein the end assembly includes two parallel end plates, which are parallel to the radial plane of the pulse magnet coil and are respectively arranged at both ends of the pulse magnet coil; the internal fixing assembly is perpendicular to the end plate of the end assembly, and its main body is arranged between the two end plates of the end assembly, and is located at an interface position inside the magnet coil where free separation between coil layers will occur. After the magnet coil is wound or assembled to a predetermined step, the internal fixing assembly is arranged to clamp the two end plates of the end assembly to provide additional axial pre-tightening force for the end plates; the present invention can effectively reduce the axial gap between the coil turns caused by the circumferential pre-tightening force on the coil during the winding or assembly process of the magnet coil, thereby reducing the axial gap between the magnet end coil and the end plate when the magnet is discharged, thereby improving the service life of the magnet.
Description
Technical Field
The invention belongs to the technical field of a pulse strong magnetic field, and particularly relates to an axial strengthening device of a high-field pulse magnet.
Background
The strong magnetic field technology provides an extreme experimental environment for scientific research, and a plurality of important scientific research results are generated under the strong magnetic field environment. The stronger the magnetic field, the greater the chance of obtaining a new discovery. Pulsed magnets can achieve higher magnetic field strengths than steady state magnets.
The main factor affecting the operational life of high field (50T) pulsed magnets is the huge electromagnetic stress that the magnets are subjected to when they are discharged. The magnet coil is simultaneously subjected to electromagnetic stress of radial outward expansion and electromagnetic stress of axial extrusion when the magnet discharges, and the electromagnetic stress is expressed as radial expansion and axial compression.
When the magnetic field is 50T, the electromagnetic stress born by the magnet is 1GPa, and when the magnetic field reaches 100T, the electromagnetic stress born by the magnet is as high as 4GPa, and the practical conductor material with highest strength cannot be born independently at present.
In the 90 s of the last century, the university of belgium and luwen found that after the force analysis of the pulse magnet, the force of the coil conductor layer was discontinuous in the radial direction of the magnet coil, a free separation interface appears between layers inside the coil, and the radial electromagnetic force born by the magnet cannot be transferred at the interlayer free separation interface, so the pulse magnet structure for reinforcing the pulse magnet coil wire in a layered manner is proposed. The adoption of the layering reinforcement technology can raise the peak value of the pulse magnetic field from 68T to about 80T. All ultra-high field (more than or equal to 80T) pulse magnets in the world currently adopt a layered reinforcement technology.
The layering reinforcement technology of the magnet can well bear the electromagnetic stress of radial expansion, but cannot share the electromagnetic stress of axial compression, the electromagnetic stress of axial compression can enable the magnet coil to generate axial extrusion deformation and displacement, the accumulation of the axial extrusion deformation and the displacement of each turn of coil enables the displacement of the magnet end coil to be maximum, and then the separation of the magnet end coil and the magnet end plate can be caused, and in a gap area where the magnet end coil and the end plate are separated, the coil is often damaged, namely the end coil is damaged. End coil damage is a common form of damage in high field pulsed magnet operation, severely affecting the life of the high field pulsed magnet.
The existing axial reinforcement mode of the high-field pulse magnet is generally that after the magnet coil is wound or assembled, a screw rod is penetrated through holes in the edge of the magnet end plate, the screw rod is uniformly arranged on the periphery of the magnet coil, two ends of the screw rod are fastened by nuts, the magnet end plate is clamped, axial pretightening force is provided for the end plate, and the magnet coil is compressed.
The method is a post-reinforcement method, namely reinforcement treatment is carried out after the winding or assembling of the magnet coil is completed, and additional axial pretightening force besides the original axial pretightening force can not be provided for the magnet end plate in the winding or assembling process of the magnet coil, so that the axial increase of the coil caused by the annular pretightening force of the coil in the winding or assembling process of the magnet coil can not be effectively reduced, and the inter-turn axial gap formed in the winding or assembling process of the coil can not be effectively controlled.
The German De Leston strong magnetic field laboratory adopts a technology of axial winding and reinforcing of steel ropes in a pulse magnet for realizing 94.2T ultra-high field so as to reduce the axial gap between an end coil and an end plate when the magnet is discharged. The technology is a post-reinforcement mode, has the same problems as the common reinforcement mode, can not effectively reduce the axial growth of the coil caused by the circumferential pretightening force applied to the coil in the winding or assembling process of the magnet coil, and can not well control the inter-turn axial gap formed in the winding or assembling process of the coil.
In summary, the existing method can not provide an additional axial pre-tightening force for the magnet end plate in addition to the original axial pre-tightening force to further compress the magnet coil in the magnet coil winding or assembling process, can not effectively reduce the axial growth of the coil caused by the circumferential pre-tightening force of the coil in the magnet coil winding or assembling process, can not effectively control the inter-turn axial gap formed in the coil winding or assembling process, and further can not effectively reduce the axial separation gap formed between the end coil and the end plate due to the accumulation of axial deformation displacement of the magnet coil caused by the electromagnetic stress of axial compression in the magnet discharging process, and can not well solve the problem of damage of the magnet end coil.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an axial strengthening device of a high-field pulse magnet, which aims to solve the problems that in the prior art, additional axial pretightening force besides the original axial pretightening force can not be provided for a magnet end plate to further compress the magnet coil in the magnet coil coiling or assembling process, the axial growth of the coil caused by the annular pretightening force of the coil in the magnet coil coiling or assembling process can not be effectively reduced, the inter-turn axial gap formed in the coil coiling or assembling process can not be effectively controlled, the axial separation gap formed between the end coil and the end plate due to the accumulation of axial deformation displacement of the magnet coil caused by the electromagnetic stress of axial compression in the magnet discharging process can not be effectively reduced, and the damage of the magnet end coil can not be well solved.
The invention provides an axial strengthening device of a high-field pulse magnet, which comprises an end assembly and an inner fixing assembly, wherein the end assembly comprises two parallel end plates which are parallel to the radial plane of a pulse magnet coil and are respectively arranged at two ends of the pulse magnet coil, the inner fixing assembly is perpendicular to the end plates of the end assembly, a main body of the inner fixing assembly is arranged between the two end plates of the end assembly and positioned at an interface position where free separation between coil layers can occur inside the pulse magnet coil, and when the pulse magnet coil is wound or assembled to a preset step, the two end plates of the end assembly are clamped by arranging the inner fixing assembly to provide additional axial pre-tightening force for the end plates.
The reinforcing device provided by the invention can provide additional axial pre-tightening force for the magnet end plate besides the original axial pre-tightening force in the process of winding or assembling the magnet coil. Because the additional axial preload force is higher near the junction of the magnet end plate and the inner stationary assembly, which is located within the radial radius of the magnet coil, is generally closer to the magnet coil, the additional axial preload force that can be applied to the magnet coil is higher. Therefore, the axial growth of the coil caused by the circumferential pretightening force of the coil in the winding or assembling process of the magnet coil can be effectively reduced, and the inter-turn axial gap of the coil formed in the winding or assembling process of the magnet coil can be effectively reduced, so that the inter-turn axial gap of the wound or assembled magnet coil is smaller. And further, an end axial gap generated by axial separation between the end coil and the end plate due to axial deformation displacement accumulation of the magnet coil caused by axial compression electromagnetic stress during magnet discharge can be reduced.
In the embodiment of the invention, after the stress analysis is carried out on the pulse magnet, the stress of the conductor layers of the coil is not continuous in the radial direction of the coil of the magnet, and a free separation interface can be formed between the layers inside the coil. At the interface position where the interlayer free separation occurs, the magnetic coil is not pressed by radial electromagnetic stress of the magnetic coil.
The main body of the internal fixing component is arranged at an interface position between the inner layers of the coil, free separation can occur, and damage to the internal fixing component caused by extrusion of radial electromagnetic stress of the magnet coil in the magnet discharging process can be avoided.
Still further, the number of internal fixation elements is one or more, the internal fixation elements being disposed at interface locations between layers where free separation between coil layers can occur. When the number of the internal fixing components is multiple, the multiple internal fixing components can be simultaneously arranged at the interface position between layers where free separation between coil layers can occur in the same layer, and can also be respectively arranged at the interface position between layers where free separation between coil layers can occur.
Furthermore, the internal fixing component is made of a material with a heat conduction coefficient of more than or equal to 50W/m.K, so that the internal fixing component can play a role in accelerating heat dissipation of the magnet.
Still further, the arrangement of the internal fixation assembly may be combined with the arrangement of the magnet cooling channels, i.e. the internal fixation assembly is arranged in the cooling channels, to further promote heat exchange of the magnet with the external environment.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
according to the axial strengthening device for the high-field pulse magnet, provided by the invention, through the combination of the end part assembly and the internal fixing assembly positioned at the free separation interface position between the coil layers, additional axial pre-tightening force except the original axial pre-tightening force can be provided for the magnet end plate in the magnet coil winding or assembling process, higher additional axial pre-tightening force can be applied to the magnet end plate and the magnet coil, effective axial pre-tightening force constraint is provided for the magnet end plate and the magnet coil, axial increase of the coil caused by the circumferential pre-tightening force of the magnet coil in the magnet winding or assembling process can be effectively reduced, so that the inter-coil axial gap formed in the magnet coil winding or assembling process can be effectively reduced, the inter-coil axial gap of the magnet coil during winding or assembling is smaller, the end axial gap generated by axial separation between the end coil and the end plate due to axial deformation displacement of the magnet coil caused by axial compression electromagnetic stress accumulation during magnet discharging can be further reduced, and the service life of the high-field pulse magnet is prolonged.
The technical scheme provided by the invention has the advantages of fewer accessories, simple manufacturing and assembling processes and capability of achieving the effect of prolonging the service life of the magnet by using a simpler process.
Drawings
FIG. 1 is a schematic cross-sectional view of an axial strengthening device for a high field pulse magnet provided by an embodiment of the present invention;
FIG. 2 is an overall schematic diagram of an axial strengthening device for a high field pulse magnet provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a typical high field pulsed magnet discharge current waveform;
Fig. 4 is a schematic diagram of a conventional high-field pulse magnet for generating a 60T peak magnetic field compared with a schematic diagram of a high-field pulse magnet for generating a 60T peak magnetic field provided in an embodiment of the present invention, wherein (a) is a schematic diagram of a conventional magnet in a non-discharge state, (b) is a schematic diagram of a conventional magnet in a non-discharge state, (c) is a schematic diagram of a conventional magnet in a discharge state, and (d) is a schematic diagram of a magnet in a discharge state;
In all figures the same reference numerals are used to denote the same elements or structures, wherein 1 is an end assembly, 2 is an internal fixation assembly, 3 is a cooling channel, 4 is a pulse magnet coil.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention provides an axial strengthening device of a high-field pulse magnet, which reduces the axial growth of a coil caused by the circumferential pre-tightening force of the coil in the process of winding or assembling the magnet coil by providing the additional axial pre-tightening force for a magnet end plate in addition to the original axial pre-tightening force in the process of winding or assembling the magnet coil, thereby reducing the inter-coil axial gap formed during winding or assembling the magnet coil, enabling the inter-coil axial gap of the wound or assembled magnet coil to be smaller, further reducing the end axial gap generated by axial separation between an end coil and the end plate due to accumulation of axial deformation displacement of the magnet coil caused by the electromagnetic stress of axial compression in the process of discharging the magnet, and prolonging the service life of the high-field pulse magnet.
The axial strengthening device of the high-field pulse magnet comprises an end assembly and an inner fixing assembly, wherein the end assembly comprises two parallel end plates which are parallel to the radial plane of a pulse magnet coil and are respectively arranged at two ends of the pulse magnet coil, the inner fixing assembly is perpendicular to the end plates of the end assembly, the main body of the inner fixing assembly is arranged between the two end plates of the end assembly and positioned at the interface position where free separation between coil layers can occur inside the magnet coil, when the magnet coil is wound or assembled to a preset step, the inner fixing assembly is arranged to clamp the two end plates of the magnet end assembly, an additional axial pre-tightening force except the original axial pre-tightening force is provided for the end plates, thus the additional axial pre-tightening force except the original axial pre-tightening force can be provided for the magnet end plates in the winding or assembling process of the magnet coil, the additional axial pre-tightening force near the connecting position of the magnet end plates and the inner fixing assembly is higher, and the connecting position is positioned in the radial radius range of the magnet coil, the additional axial pre-tightening force applied to the magnet coil is higher, and therefore the axial pre-tightening force between the magnet coil and the magnet coil is effectively reduced, and the axial pre-tightening force is effectively increased due to the axial pre-tightening force is increased due to the coil pre-tightening force of the coil and the coil during winding or the coil assembly, and the axial pre-tightening force is more axially and the axial pre-tightening force is effectively increased and the axial pre-tightening force is caused when the axial compression force is increased and the magnet coil is more than the axial pre-tightening force.
In the embodiment of the invention, the main body of the internal fixing component is arranged at the interface position between the inner layers of the coil, and free separation can occur, because the interface position with the free separation between the layers can not be extruded by radial electromagnetic stress of the magnet coil, the internal fixing component can be prevented from being damaged by the extrusion of the radial electromagnetic stress of the magnet coil in the magnet discharging process.
As an embodiment of the present invention, the end plate of the end assembly may be an epoxy glass laminated board or other kinds of boards with certain strength, and the boards may be flat boards, stepped or arc boards, or a whole board, or a plurality of boards spliced or combined. The end plates of the end assemblies have holes disposed therein for insertion into or through the inner fixing assemblies. The connection part of the end plate of the end component and the internal fixing component is connected and fastened by adopting a nut connection mode or a welding mode or an adhesive bonding mode.
In the embodiment of the invention, the number of the internal fixing components is one or more. The internal fixing component is a high-strength stainless steel screw rod or other kinds of rod members with certain strength, or other kinds of plate members or pipe members with certain strength and proper shape and arrangement at the position where free separation interface between coil layers can occur, or is a soft connecting piece with certain strength such as a steel cable. The internal fixation assembly may be disposed at only the interface between layers where free separation between the coil layers occurs in the same layer, or may be disposed at the interface between layers where free separation between the coil layers occurs in multiple different layers. The internal fixing component can be made of a material with a higher heat conductivity coefficient, so that the internal fixing component can play a role in accelerating heat dissipation of the magnet. The arrangement of the internal fixation assembly may be combined with the arrangement of the magnet cooling channels to further facilitate heat exchange of the magnet with the external environment.
In the embodiment of the invention, the winding or assembling mode of the magnet coil can be a continuous winding mode, a layered winding and assembling mode, a mode of assembling conductors after cutting and forming according to a spiral structure, a mode of assembling a plurality of conductors in a splicing mode, a 3D printing mode and the like.
In order to further explain the axial strengthening device of the high-field pulse magnet, which is provided by the invention, the application scene of the axial strengthening device takes the high-field pulse magnet with internal fixing components only arranged at the interface position between layers where free separation between coil layers can occur in the same layer as an example, and the cross-section structure schematic diagram of the axial strengthening device is shown in fig. 1, and the axial strengthening device comprises an end component 1, an internal fixing component 2, a cooling channel 3 and a magnet coil 4.
Wherein the end assembly 1 comprises two parallel end plates, which are parallel to the radial plane of the magnet coil 4, and are respectively arranged at two ends of the magnet coil 4;
The internal fixation assembly 2 is perpendicular to the end plates of the end assembly 1, and the main body of the internal fixation assembly is arranged between the two end plates of the end assembly 1 and is positioned at an interface position where free separation between coil layers can occur inside the magnet coil 4;
The cooling channel 3 is designed by utilizing the characteristic that radial interlayer separation can occur inside the magnet coil 4 when the high-field pulse magnet discharges, and is also arranged at an interface position between the inner layers of the magnet coil 4, wherein the interface position can be freely separated;
in the present embodiment, the main body of the inner fixing component 2 and the cooling channel 3 are arranged at the interface position between the layers where free separation between the coil layers occurs, so that the main body of the inner fixing component 2 can be said to be located within the range of the cooling channel 3;
The main body of the internal fixing component 2 and the cooling channel 3 are arranged at the interface position between the inner layers of the coil, so that free separation can occur, the extrusion of radial electromagnetic stress of the magnet coil can not occur at the interface position where the free separation between the layers occurs, and the internal fixing component 2 and the cooling channel 3 can be prevented from being damaged due to the extrusion of the radial electromagnetic stress of the magnet coil in the magnet discharging process;
In this embodiment, the cooling channels 3 are designed with holes at both ends, the holes are arranged on the end surfaces of two parallel end plates contained in the end assembly 1, and the cooling channels and the holes serving as inlets and outlets can provide inflow and outflow paths for gas or liquid cooling medium, so that heat exchange between the magnet coil 4 and the external environment can be promoted.
Specifically, the material of the end component 1 should be a material with a certain strength, and in this embodiment, the material of the two parallel end plates included in the end component 1 is epoxy glass laminated board.
Specifically, the structure and the size of the end assembly 1 may be selected as required, and in this embodiment, the main body structure of the two parallel end plates included in the end assembly 1 is a circular plate with an outer diameter of 460mm and a thickness of 50 mm.
Specifically, the number and positions of the holes arranged on the end assembly 1 may be selected as required, and in this embodiment, the end assembly 1 includes two end plates each arranged with 10 holes, 20 holes in total, uniformly arranged circumferentially on the end surfaces of the end plates, wherein 16 holes are used for passing through the inner fixing assembly 2, and 4 holes are used as inlets and outlets of the cooling passages 3.
Specifically, the material of the inner fixing component 2 should be a material with a certain strength, and in this embodiment, the inner fixing component 2 is a high-strength stainless steel screw.
Specifically, the number of screws used for the internal fixation assembly 2 may be selected as required, and in this embodiment, the number of screws is 8.
Specifically, the diameter of the screw used for the internal fixation assembly 2 may be selected as desired, and in this embodiment the screw has a diameter of 12mm.
Specifically, the location of the inner fixing component 2 may be selected according to the requirement, but the main body of the inner fixing component 2 must be arranged at the interface position where free separation occurs between the inner layers of the coils, and in this embodiment, the main body of the inner fixing component 2 is arranged between the 4 th layer and the 5 th layer of coils from inside to outside of the magnet coil 4.
Specifically, the connection mode of the connection part between the end plate of the end component 1 and the inner fixing component 2 can be selected according to the requirement, and the connection part is connected by adopting a nut in the embodiment.
Specifically, the inner fixing component 2 may be made of a material with a relatively high thermal conductivity as required, and in this embodiment, the inner fixing component 2 is made of stainless steel.
Specifically, the arrangement of the internal fixation assembly 2 may be combined with the arrangement of the magnet cooling channels 3, in which embodiment the internal fixation assembly 2 is arranged between the 4 th and 5 th layer of coils of the magnet coils 4 from inside to outside simultaneously with the cooling channels 3.
Specifically, the number and arrangement positions of the cooling passages 3 may be selected as required, and the number of the cooling passages 3 in this embodiment is 1 layer, and as with the internal fixation assembly 2, the cooling passages 3 are arranged between the 4 th layer and the 5 th layer of coils from the inside to the outside of the magnet coil 4.
Specifically, the number and arrangement positions of the holes designed for the cooling channels 3 can be selected according to needs, and in this embodiment, the cooling channels are designed with 4 holes, which are respectively located on the end surfaces of two parallel end plates included in the end assembly 1, and 2 end plates are respectively located on each end plate.
Specifically, the winding or assembling manner of the magnet coil 4 may be selected according to the need, and the magnet coil 4 is manufactured by adopting a continuous winding manner in this embodiment.
Specifically, the number of layers of the magnet coil 4 may be selected as required, and in this embodiment, the magnet coil 4 has 4 layers in the cooling passage 3, and 6 layers outside the cooling passage 3, and a total of 10 layers.
In this embodiment, after the winding of the 4 th layer coil is completed from inside to outside by the magnet coil 4, an internal fixing component 2 is arranged between the completed 4 th layer coil and the unreeled 5 th layer coil, the internal fixing component 2 is perpendicular to the end plates of the end component 1, the main body of the internal fixing component 2 is arranged between the two end plates of the end component 1, the two end plates of the magnet end component 1 are clamped by the internal fixing component 2, an additional axial pre-tightening force is provided for the end plates in addition to the original axial pre-tightening force, then a cooling channel 3 is arranged, and then the winding work of the remaining 5 th layer to 10 th layer coils is completed.
This provides an additional axial preload for the magnet end plates during the winding of the magnet coils 4 in addition to the original axial preload,
Because the additional axial preload is higher near the junction of the magnet end plate and the inner fixture assembly 1, which is located within the radial radius of the magnet coil 4, is generally closer to the magnet coil 4, so that the additional axial preload that can be applied to the magnet coil is higher,
Therefore, the axial increase of the coil caused by the circumferential pretightening force of the coil in the winding process of the magnet coil 4 can be effectively reduced, and the inter-turn axial gap of the coil formed in the winding process of the magnet coil 4 can be effectively reduced, so that the inter-turn axial gap of the wound magnet coil 4 is smaller.
And further, an end axial gap generated by axial separation between the end coil and the end plate due to accumulation of axial deformation displacement of the magnet coil 4 caused by axial compression electromagnetic stress during magnet discharge can be reduced.
The axial growth of the magnet coil 4 of the conventional high-field pulse magnet for generating a 60T peak magnetic field is generally about 3mm after the conventional high-field pulse magnet for generating a 60T peak magnetic field is wound and reinforced, the axial growth of the magnet coil 4 of the high-field pulse magnet for generating a 60T peak magnetic field provided in this embodiment is only about 1mm after the conventional high-field pulse magnet is wound and reinforced, and the axial growth of the magnet coil 4 is reduced by about 2mm compared with the conventional high-field pulse magnet, and the inter-turn axial gap of the magnet coil 4 in this embodiment is smaller than that of the conventional high-field pulse magnet.
The conventional high-field pulse magnet for generating a 60T peak magnetic field and the high-field pulse magnet for generating a 60T peak magnetic field provided in this embodiment are shown in fig. 4 in a schematic cross-sectional view of the magnet at the time of undischarged and discharge current peak, and it can be seen that the coil inter-turn axial gap of the magnet provided in this embodiment is smaller than that of the conventional magnet at the time of undischarged, and the end axial gap between the end coil and the end plate due to the electromagnetic stress of the coil axial compression at the time of discharge current peak is also smaller than that of the conventional magnet.
The technical scheme provided by the invention effectively restricts the axial gap of the magnet, has fewer required accessories and simple manufacturing and assembling processes, and can achieve the effect of prolonging the service life of the magnet by a simpler process.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
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| CN117637309B (en) * | 2023-12-21 | 2024-06-21 | 华中科技大学 | Axial decompression structure of magnet coil and magnet with decompression structure |
| CN117877833B (en) * | 2024-01-26 | 2024-07-16 | 华中科技大学 | A fast cooling high field flat-top pulse magnet |
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| CN102136337A (en) * | 2010-12-08 | 2011-07-27 | 中国科学院电工研究所 | Highfield high uniformity nuclear magnetic resonance superconducting magnet system |
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| US6735848B1 (en) * | 1999-09-24 | 2004-05-18 | Fsu Research Foundation, Inc. | Method of manufacturing a superconducting magnet |
| JP6686936B2 (en) * | 2017-01-25 | 2020-04-22 | 株式会社Ｓｏｋｅｎ | Electromagnetic relay |
| CN107742566A (en) * | 2017-10-26 | 2018-02-27 | 华北电力大学 | A Superconducting Magnet Based on NbTi Superconducting Ring |
| CN110136937B (en) * | 2019-05-10 | 2024-02-02 | 华中科技大学 | A support structure for a split pulse magnet coil |
| CN111009378A (en) * | 2019-12-20 | 2020-04-14 | 华中科技大学 | A high-strength parallel pulsed magnet device |
| CN110873855B (en) * | 2020-01-20 | 2020-04-21 | 华中科技大学 | A pulsed magnet device and high-flux measurement method based on magnetic flux compression |
| CN111916269B (en) * | 2020-08-12 | 2024-11-05 | 华中科技大学 | End reinforcement structure of a pulse magnet coil |
| CN115312285B (en) * | 2022-09-06 | 2025-08-05 | 中国科学院合肥物质科学研究院 | A Bitter-type FeSeTe superconducting magnet system |
| CN117637309B (en) * | 2023-12-21 | 2024-06-21 | 华中科技大学 | Axial decompression structure of magnet coil and magnet with decompression structure |
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| CN102136337A (en) * | 2010-12-08 | 2011-07-27 | 中国科学院电工研究所 | Highfield high uniformity nuclear magnetic resonance superconducting magnet system |
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