Reversing structure and high-temperature superconducting undulator magnet structure

Abstract

The invention discloses a commutation structure and a high-temperature superconducting undulator magnet structure, and relates to the technical field of undulators, the commutation structure is applied to winding of a high-temperature superconducting tape, the commutation structure is provided with a first commutation body and a second commutation body which are connected, the first commutation body is provided with a first commutation groove, and the second commutation body is provided with a second commutation groove. The first reversing groove comprises a first spiral groove section and a horizontal groove section which are connected, the horizontal groove section is arranged in the length direction of the first reversing body, and an inlet is formed in the end, away from the first spiral groove section, of the horizontal groove section; the second reversing body is provided with a second reversing groove, the second reversing groove comprises an inclined groove section, a second spiral groove section and a vertical groove section which are connected, the vertical groove section is arranged in the height direction of the second reversing body, and an outlet is formed in the end, away from the second spiral groove section, of the vertical groove section; the two ends of the inclined groove section communicate with the end, away from the horizontal groove section, of the first spiral groove section and the end, away from the vertical groove section, of the second spiral groove section correspondingly. The invention aims to reduce the quenching and damage risk of the high-temperature superconducting undulator magnet structure.

Description

Technical Field

[0001] The present invention relates to the technical field of undulators, and particularly relates to a commutation structure and a high-temperature superconducting undulator magnet structure. Background Art

[0002] A superconducting undulator is a key device for large scientific devices such as synchrotron radiation devices, positron-electron colliders, and free-electron laser devices. By generating a strong magnetic field, it causes the electron beam to deflect laterally, thereby generating high-intensity synchrotron radiation light. With the increasing demand for high-energy photons, the performance of superconducting undulators is developing towards the characteristics of short periods and strong magnetic fields. Using high-temperature superconducting tapes (such as REBCO) to wind undulator magnets can significantly improve the performance of undulator magnets, which is one of the most promising research directions for superconducting undulators at present.

[0003] However, there are the following problems when using high-temperature superconducting tapes to wind superconducting undulator coils: The coils of superconducting undulators are usually arranged periodically, and the inlets and outlets of adjacent coils are often connected by making superconducting joints. However, when a current is passed through the superconducting joint, a resistance will be generated and heat will be generated, resulting in an increase in the temperature of the superconducting coil. The increase in temperature easily causes the superconducting coil to quench or be damaged, and then leads to the quenching and damage of the entire superconducting undulator magnet. Summary of the Invention

[0004] The main object of the present invention is to propose a commutation structure and a high-temperature superconducting undulator magnet structure, aiming to reduce the risk of quenching and damage of the high-temperature superconducting undulator magnet structure.

[0005] To achieve the above object, the commutation structure proposed by the present invention is applied to the winding of high-temperature superconducting tapes. The commutation structure has a first commutation body and a second commutation body connected to each other. The first commutation body is provided with a first commutation groove, and the first commutation groove includes a connected first spiral groove section and a horizontal groove section. The horizontal groove section is arranged along the length direction of the first commutation body, and an inlet is provided at one end of the horizontal groove section far from the first spiral groove section; the second commutation body is provided with a second commutation groove, and the second commutation groove includes a connected inclined groove section, a second spiral groove section, and a vertical groove section. The vertical groove section is arranged along the height direction of the second commutation body, and an outlet is provided at one end of the vertical groove section far from the second spiral groove section; Wherein, both ends of the inclined groove section are respectively communicated with one end of the first spiral groove section far from the horizontal groove section and one end of the second spiral groove section far from the vertical groove section.

[0006] In one embodiment, the first commutator has a first helical surface, a first vertical surface, a first horizontal surface, and a second vertical surface. The first helical groove section is located on the first helical surface, and the horizontal groove section is located on the first vertical surface. The second commutator has a second helical surface, a third vertical surface, a fourth vertical surface, and a second horizontal surface. The second helical groove section is located on the second helical surface, the vertical groove section is located on the third vertical surface, and the inclined groove section is located on the fourth vertical surface. Wherein, the first horizontal surface and the second horizontal surface are parallel and spaced apart.

[0007] In one embodiment, the first vertical surface and the second vertical surface are parallel to each other, and the third vertical surface and the fourth vertical surface are parallel to each other.

[0008] In one embodiment, the first vertical surface and the third vertical surface are parallel to each other, and the distance between the first vertical surface and the third vertical surface is D1, where 0 mm ≤ D1 ≤ 100 mm.

[0009] In one embodiment, the distance between the first vertical surface and the third vertical surface is 19 mm, and a notch is formed below the first commutator.

[0010] In one embodiment, the reference circle radius of the first helical groove section is R1, where 1 mm ≤ R1 ≤ 100 mm; and the reference circle radius of the second helical groove section is R2, where 1 mm ≤ R2 ≤ 100 mm.

[0011] In one embodiment, the included angle formed between the central axis of the first helical groove section and the central axis of the second helical groove section is , where 10° ≤ ≤ 80°, the pitch of the first helical groove section is , and the pitch of the second helical groove section is .

[0012] In one embodiment, in the extending direction of the horizontal groove section, the length of the first commutator is less than the length of the second commutator.

[0013] In one embodiment, the depth of the first commutating groove and the second commutating groove is H, where 0.01 mm ≤ H ≤ 1 mm; and / or the width of the first commutating groove and the second commutating groove is D2, where 1 mm ≤ D2 ≤ 20 mm.

[0014] The present invention also provides a high-temperature superconducting undulator magnet structure, including a plurality of commutating structures as described in any one of the above embodiments.

[0015] In the technical solution of the present invention, after a high-temperature superconducting tape winds a coil and before entering the winding operation of the next coil, the high-temperature superconducting tape enters the horizontal groove section from the inlet of the horizontal groove section, and successively enters the first spiral groove section, the inclined groove section, the second spiral groove section, and the vertical groove section, and is led out from the outlet of the vertical groove section, and then the winding of the next coil is carried out. Multiple coils arranged side by side can be wound according to the above operations; the high-temperature superconducting tape realizes two commutations respectively in the first spiral groove section and the second spiral groove section, enters from the horizontal state and is led out after commuting to the vertical state. By adopting multiple commutation structures arranged side by side, continuous winding of multiple coils can be realized without making superconducting joints, which simplifies the connection process of the wire ends of adjacent coils, reduces the thermal stress and mechanical stress at the joints, reduces the risk of quench and damage of the superconducting undulator magnet while realizing the connection of the wire ends of multiple adjacent coils, and continuous winding can ensure the uniformity and consistency of the coils, improving the overall performance of the structure of the high-temperature superconducting undulator magnet. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0017] Figure 1 It is a schematic structural diagram of a first perspective of an embodiment of the commutation structure provided by the present invention; Figure 2 It is a schematic structural diagram of a second perspective of an embodiment of the commutation structure provided by the present invention; Figure 3 It is a schematic structural diagram of an embodiment of the cooperation between multiple commutation structures and coils provided by the present invention; Figure 4 It is a front view of an embodiment of the cooperation between multiple commutation structures and coils provided by the present invention; Figure 5 It is a side view of an embodiment of the commutation structure provided by the present invention; Figure 6 It is a schematic diagram obtained by unfolding a cylindrical spiral groove provided by the present invention; Figure 7 It is a side view of another embodiment of the commutation structure provided by the present invention.

[0018] Explanation of the Reference Numerals in the Drawings: 100, Commutation structure; 1, First commutation body; 11, First commutation groove; 111, First helical groove section; 112, Horizontal groove section; 112a, Inlet; 113, First helical surface; 114, First vertical surface; 115, First horizontal surface; 116, Second vertical surface; 117, Notch; 2, Second commutation body; 21, Second commutation groove; 211, Inclined groove section; 212, Second helical groove section; 213, Vertical groove section; 213a, Outlet; 214, Second helical surface; 215, Third vertical surface; 216, Fourth vertical surface; 217, Second horizontal surface.

[0019] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0021] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, if there are descriptions such as "first" and "second" in the embodiments of the present invention, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0023] The present invention provides a commutation structure 100.

[0024] Please refer to Figure 1 and Figure 3In one embodiment of the present invention, the commutation structure 100 is applied to the winding of a high-temperature superconducting tape. The commutation structure 100 comprises a first commutation body 1 and a second commutation body 2 connected to each other. The first commutation body 1 is provided with a first commutation slot 11. The first commutation slot 11 comprises a first spiral slot section 111 and a horizontal slot section 112 connected to each other. The horizontal slot section 112 is arranged along the length direction of the first commutation body 1. An inlet 112a is provided at one end of the horizontal slot section 112 away from the first spiral slot section 111. The second commutation body 2 is provided with a first commutation slot 111. A second commutation groove 21 is provided, and the second commutation groove 21 includes a connected oblique groove section 211, a second spiral groove section 212 and a vertical groove section 213. The vertical groove section 213 is arranged along the height direction of the second commutation body 2, and an outlet 213a is provided at one end of the vertical groove section 213 away from the second spiral groove section 212; wherein the two ends of the oblique groove section 211 are respectively connected with one end of the first spiral groove section 111 away from the horizontal groove section 112 and one end of the second spiral groove section 212 away from the vertical groove section 213.

[0025] In the technical solution of the present invention, after the high-temperature superconducting tape is wound with one coil, before entering the next coil winding operation, the high-temperature superconducting tape enters the horizontal slot section 112 from the inlet 112a of the horizontal slot section 112, and sequentially enters the first spiral slot section 111, the inclined slot section 211, the second spiral slot section 212 and the vertical slot section 213, and is led out from the outlet 213a of the vertical slot section 213, and then the next coil is wound. According to the above operation, multiple coils arranged side by side can be wound; the high-temperature superconducting tape is respectively wound in the first spiral slot section 111 and the second spiral slot section 212. The spiral groove segment 212 realizes two commutations, entering the commutation from a horizontal state and leading out to a vertical state. A plurality of commutation structures 100 arranged side by side can realize continuous winding of a plurality of coils without making superconducting joints, thereby simplifying the connection process of the wire ends of adjacent coils, reducing thermal stress and mechanical stress at the joints, and reducing the risk of quenching and damage of the superconducting undulator magnet while realizing the connection of the wire ends of a plurality of adjacent coils. Continuous winding can ensure the uniformity and consistency of the coils, thereby improving the overall performance of the high-temperature superconducting undulator magnet structure.

[0026] Specifically, see Figure 1 and Figure 2, in an embodiment of the present invention, the first commutator 1 has a first helical surface 113, a first vertical surface 114, a first horizontal surface 115, and a second vertical surface 116. The first helical groove section 111 is located on the first helical surface 113, and the horizontal groove section 112 is located on the first vertical surface 114. The second commutator 2 has a second helical surface 214, a third vertical surface 215, a fourth vertical surface 216, and a second horizontal surface 217. The second helical groove section 212 is located on the second helical surface 214, the vertical groove section 213 is located on the third vertical surface 215, and the inclined groove section 211 is located on the fourth vertical surface 216. Among them, the first horizontal surface 115 and the second horizontal surface 217 are parallel and spaced apart. The parallel and spaced arrangement of the first horizontal surface 115 and the second horizontal surface 217 forms an interval space between the first horizontal surface 115 and the second horizontal surface 217, that is, an interval space is formed between the first commutator 1 and the second commutator 2. In actual application of the commutation structure 100, the commutation structure 100 can be installed and clamped on the yoke of the high-temperature superconducting undulator magnet structure through the above interval space to realize the fixation of the commutation structure 100. Through the interval space between the first horizontal surface 115 and the second horizontal surface 217, the commutation structure 100 can be tightly installed on the yoke, reducing additional fixing devices and making the overall structure more compact. At the same time, this clamping method can provide sufficient stability to ensure the reliable operation of the commutation structure 100 in the high-temperature superconducting undulator magnet structure. Adopting the clamping method to fix the commutation structure 100 simplifies the installation steps, reduces the installation difficulty and cost, makes the installation of the commutation structure 100 more efficient, and is also convenient for subsequent maintenance and replacement. Through reasonable structural design and fixing method, the loosening or displacement that may occur during the operation of the commutation structure 100 is reduced, and the reliability of the entire high-temperature superconducting undulator magnet structure is improved.

[0027] To realize the side-by-side arrangement of multiple commutation structures 100 and avoid interference between adjacent two commutation structures 100, please refer to Figure 1 and Figure 2, in an embodiment of the present invention, the first vertical surface 114 and the second vertical surface 116 are arranged in parallel, and the third vertical surface 215 and the fourth vertical surface 216 are arranged in parallel. The first vertical surface 114 and the second vertical surface 116 are two vertical surfaces of the first commutation body 1, and they are arranged in parallel. The third vertical surface 215 and the fourth vertical surface 216 are two vertical surfaces of the second commutation body 2, and they are arranged in parallel. This parallel arrangement is to facilitate the placement of multiple commutation structures 100 side by side without interference between adjacent commutation structures 100. Through this parallel arrangement, multiple commutation structures 100 can be closely arranged to ensure an efficient winding process within a limited space, while avoiding installation difficulties or winding failures caused by structural interference; the parallel vertical surfaces enable multiple commutation structures 100 to be closely arranged, making full use of the limited space, especially suitable for scenarios with high space requirements in the high-temperature superconducting undulator magnet structure; through reasonable layout design, interference between adjacent commutation structures 100 is avoided, ensuring that each commutation structure 100 can work properly and improving the reliability of the entire winding system; the parallel vertical surfaces make the installation of the commutation structure 100 more intuitive and convenient, reducing the installation difficulty and improving the installation efficiency; the closely arranged commutation structures 100 can better combine with support structures such as yokes, enhancing the stability of the entire system.

[0028] In an embodiment, the first vertical surface 114 and the third vertical surface 215 are arranged in parallel, and the distance between the first vertical surface 114 and the third vertical surface 215 is D1, where 0mm ≤ D1 ≤ 100mm. When the distance between the first vertical surface 114 and the third vertical surface 215 is 0mm, the first vertical surface 114 and the third vertical surface 215 are coplanar. In this state, the horizontal groove section 112 (located on the first vertical surface 114) and the vertical groove section 213 (located on the third vertical surface 215) are in the same plane, which can reduce the interference between adjacent commutation structures 100 and ensure a smooth transition of the high-temperature superconducting tape during commutation. This design makes the commutation structure 100 more compact in space, reducing the overall size, especially suitable for scenarios with limited space; when the distance between the first vertical surface 114 and the third vertical surface 215 is greater than 0mm and less than or equal to 100mm, the first vertical surface 114 and the third vertical surface 215 are non-coplanar. In this state, the horizontal groove section 112 and the vertical groove section 213 are not in the same plane, which can further reduce the interference between commutation structures 100, especially when multiple commutation structures 100 are placed side by side, it can avoid collisions or frictions between structures.

[0029] Please refer to Figure 4, in another embodiment, the distance between the first vertical surface 114 and the third vertical surface 215 is 19 mm, and a notch 117 is formed below the first commutator 1. When the distance between the first vertical surface 114 and the third vertical surface 215 is 19 mm, a notch 117 is formed below the first commutator 1, and the spatial size of this notch 117 is sufficient to accommodate part of the structure of the second commutator 2 of the previous commutation structure 100. The setting of the notch 117 enables part of the second commutator 2 of the previous commutation structure 100 to be accommodated within the notch 117 of the next commutation structure 100, realizing the compact installation of the commutation structure 100 and reducing the overall occupied space; the design of the notch 117 enables multiple commutation structures 100 to be closely arranged, reducing the gap between the commutation structures 100, thereby maximizing the utilization of limited space. This compact layout is particularly suitable for scenarios with high space requirements in the high-temperature superconducting undulator magnet structure; the design of the notch 117 ensures the compatibility between adjacent commutation structures 100, avoiding interference between structures. Even in a compact arrangement, each part of the commutation structure 100 can still work normally without colliding or rubbing against each other; the size of D1 can be adjusted according to actual needs to adapt to different installation environments and process requirements, and the size and shape of the notch 117 can also be optimized as needed to achieve the best compactness and compatibility.

[0030] To avoid reducing or damaging the performance of the high-temperature superconducting tape, please refer to Figure 5, in an embodiment of the present invention, the reference circle radius of the first helical groove section 111 is R1, where 1 mm ≤ R1 ≤ 100 mm; the reference circle radius of the second helical groove section 212 is R2, where 1 mm ≤ R2 ≤ 100 mm. During the winding process of the high-temperature superconducting tape, it is necessary to avoid too small a turning diameter. If the turning diameter is too small, the high-temperature superconducting tape will be subjected to a large bending stress, which may cause damage to its performance, such as reducing its critical current density or increasing its resistance. By setting the minimum value of the reference circle radius of the helical groove section to 1 mm, it is ensured that the turning diameter of the high-temperature superconducting tape during the winding process will not be too small, thus protecting its performance; the maximum value of the reference circle radius of the helical groove section is 100 mm, which provides sufficient flexibility for the commutation structure 100 to adapt to different application scenarios and process requirements. For example, in some scenarios that require a larger turning radius, larger values of R1 or R2 can be selected, while in scenarios with limited space, smaller values of R1 or R2 can be selected. By setting the range of the reference circle radius, it is ensured that the high-temperature superconducting tape will not be subjected to excessive bending stress during the winding process, thus protecting its performance; protecting the performance of the high-temperature superconducting tape can improve the reliability of the entire high-temperature superconducting undulator magnet structure and reduce failures caused by the degradation of the superconducting tape performance; different ranges of the reference circle radius enable the commutation structure 100 to adapt to different winding processes and application scenarios, such as different high-temperature superconducting tape materials, different winding equipment, etc.; in an embodiment, the reference circle radius of the first helical groove section 111 is preferably set to 16 mm, and the reference circle radius of the second helical groove section 212 is preferably set to 8 mm.

[0031] Please refer to Figure 5 , in an embodiment of the present invention, the included angle between the central axis of the first helical groove section 111 and the central axis of the second helical groove section 212 is , where 10° ≤ ≤ 80°, the pitch of the first helical groove section 111 is , and the pitch of the second helical groove section 212 is . The included angle can have different designs to produce different design combinations of the helical line pitch and the length of the straight section, meeting the requirements of different superconducting undulator coil size designs. In another embodiment, is preferably set to 45°.

[0032] Both the first helical groove section 111 and the second helical groove section 212 are cylindrical helical groove sections, that is, the central axis of the helical groove section is a helix, and the pitch is defined as the distance between two end points on the generatrix of any cylindrical surface when the helix rotates 360°, that is, when the number of turns of the helix is 1.

[0033] The number of turns of the helical line in this embodiment is 0.5 turn. Unfolding the cylindrical surface where the 0.5-turn cylindrical helical groove section is located (as Figure 6 shown), d is the diameter of the cylinder. Since the number of turns of the cylindrical helical line is 0.5 turn, after unfolding the cylindrical surface, the distance between the inlet and outlet of the helical groove on the cylindrical surface can be seen as , and this distance is half of the pitch of the helical line. Therefore, the pitch of the helical line is .

[0034] Further, please refer to Figure 7 , and make the following explanations with preferably set to 45°: The reference circle radius of the first helical groove section 111 is R1, and the reference circle radius of the second helical groove section 212 is R2. is 45°. At this time, the straight line ef is perpendicular to the straight line ei, the included angle between the straight line gh and the straight line ef is , the included angle between the straight line gh and the straight line ei is 90° - , and the starting angle of the helical line of the first helical groove section 111 is the included angle (acute angle) between the straight line ef and the straight line fg, that is, 90° - / 2. Similarly, is set to 45°, then the starting angle of the helical line of the second helical groove section 212 is the included angle (acute angle) between the straight line hi and the straight line ei, which is also 90° - / 2. If is not 45°, then the included angle between the straight line ef and the straight line ei is not equal to 90° - / 2. At this time, the included angle between the straight line ef and the straight line ei 90° - (90° - ) / 2 = 45° + / 2.

[0035] Therefore, it can be obtained that the pitch of the path helical line of the first helical groove section 111 is , and the pitch of the path helical line of the second helical groove section 212 is .

[0036] To leave enough installation space for the end of the wound coil, please refer to Figure 2 and Figure 5, in one embodiment, in the extending direction of the horizontal groove section 112, the length of the first commutation body 1 is less than that of the second commutation body 2. By making the length of the first commutation body 1 less than that of the second commutation body 2, the commutation structure 100 provides extra space for the end of the winding coil in the extending direction of the horizontal groove section 112, ensuring that the coil end can be smoothly installed, avoiding installation difficulties or damage caused by insufficient space; leaving enough installation space can simplify the installation process of the coil end, reduce the installation time, and improve the overall installation efficiency. Sufficient installation space can prevent the coil end from being squeezed or damaged during installation, thus protecting the integrity and performance of the coil; by reasonably adjusting the sizes of the first commutation body 1 and the second commutation body 2, an efficient winding process can be achieved within a limited space, and it can be adjusted according to different winding requirements and installation environments. For example, in a scenario where more installation space is required, the length of the second commutation body 2 can be appropriately increased, while in a space-limited scenario, the length of the second commutation body 2 can be appropriately reduced, while ensuring that the length of the first commutation body 1 is sufficient to meet the commutation function.

[0037] In one embodiment, the depths of the first commutation groove 11 and the second commutation groove 21 are H, where 0.01 mm ≤ H ≤ 1 mm; the widths of the first commutation groove 11 and the second commutation groove 21 are D2, where 1 mm ≤ D2 ≤ 20 mm. The depth of the commutation groove needs to be sufficient to accommodate the thickness of the high-temperature superconducting tape, while avoiding excessive extrusion or friction of the superconducting tape in the commutation groove. An appropriate groove depth can reduce the mechanical stress on the superconducting tape during commutation, thus protecting its performance, especially key parameters such as critical current density. The width of the commutation groove needs to be sufficient to accommodate the width of the high-temperature superconducting tape, while providing a certain space for the movement of the superconducting tape to avoid jamming. By reasonably selecting the width of the groove, an efficient winding process can be achieved within a limited space, while reducing material waste. By setting the range of the groove depth and width, it is ensured that the high-temperature superconducting tape passes smoothly in the commutation groove, reducing the influence of mechanical stress on its performance; appropriate groove depth and width can protect the superconducting tape from damage, thus improving the reliability of the entire high-temperature superconducting undulator magnet structure; the range of the groove depth and width provides sufficient flexibility and can be adjusted according to different specifications of high-temperature superconducting tapes. For thinner superconducting tapes, a smaller groove depth can be selected, and for wider superconducting tapes, a larger groove width can be selected; different groove widths and depths can adapt to different winding processes and application scenarios, such as different high-temperature superconducting tape materials, different winding equipment, etc. In one embodiment, the depths of the first commutation groove 11 and the second commutation groove 21 are preferably set to 0.05 mm, and the widths of the first commutation groove 11 and the second commutation groove 21 are preferably set to 4.2 mm.

[0038] The present invention also provides a high-temperature superconducting undulator magnet structure, which includes a commutation structure 100. The specific structure of the commutation structure 100 refers to the above embodiments. Since the high-temperature superconducting undulator magnet structure adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0039] In one embodiment, the high-temperature superconducting undulator magnet structure generally includes a coil formed by winding high-temperature superconducting tapes, a yoke, at least two end fixing pole pieces, a plurality of magnet mounting members, and a plurality of commutation structures 100 described in any one of the above embodiments. The two end fixing pole pieces are arranged on the yoke and enclose an installation groove with the yoke; a plurality of magnet mounting members are arranged on the yoke and located in the installation groove. One side of each magnet mounting member protrudes with a winding core body, and the high-temperature superconducting tape is wound around the winding core body to form a coil, and is adapted to the outer peripheral wall of the winding core body; a plurality of commutation structures 100 are clamped on the yoke and are used to realize the continuous winding of the coil. After the high-temperature superconducting tape is wound around one winding core body to form a coil, before entering the next coil winding operation, the high-temperature superconducting tape enters the horizontal groove section 112 from the inlet 112a of the horizontal groove section 112, and successively enters the first spiral groove section 111, the inclined groove section 211, the second spiral groove section 212, and the vertical groove section 213, and is led out from the outlet 213a of the vertical groove section 213, and then winds around the next winding core body to wind the next coil. According to the above operation, a plurality of coils arranged side by side can be wound; the high-temperature superconducting tape realizes two commutations respectively in the first spiral groove section 111 and the second spiral groove section 212, and is led out from the horizontal state after being commuted to the vertical state. By using a plurality of commutation structures 100 arranged side by side, the continuous winding of a plurality of coils can be realized without making superconducting joints, which simplifies the connection process of the wire ends of adjacent coils, reduces the thermal stress and mechanical stress at the joints, reduces the risk of quench and damage of the high-temperature superconducting undulator magnet while realizing the connection of the wire ends of a plurality of adjacent coils, and the continuous winding can ensure the uniformity and consistency of the coils, and improves the overall performance of the high-temperature superconducting undulator magnet structure.

[0040] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A commutation structure, used for winding high-temperature superconducting tape, characterized in that: The commutation structure comprises a first commutation body and a second commutation body connected to each other, the first commutation body is provided with a first commutation groove, the first commutation groove comprises a first spiral groove section and a horizontal groove section connected to each other, the horizontal groove section is arranged along the length direction of the first commutation body, and an inlet is arranged at one end of the horizontal groove section away from the first spiral groove section; the second commutation body is provided with a second commutation groove, the second commutation groove comprises a connected oblique groove section, a second spiral groove section and a vertical groove section, the vertical groove section is arranged along the height direction of the second commutation body, and an outlet is arranged at one end of the vertical groove section away from the second spiral groove section; Wherein, two ends of the inclined groove section are respectively connected with one end of the first spiral groove section away from the horizontal groove section and one end of the second spiral groove section away from the vertical groove section.

2. The commutation structure according to claim 1, characterized in that: The first commutator has a first helical surface, a first vertical surface, a first horizontal surface and a second vertical surface, the first spiral groove segment is located on the first helical surface, and the horizontal groove segment is located on the first vertical surface; the second commutator has a second helical surface, a third vertical surface, a fourth vertical surface and a second horizontal surface, the second spiral groove segment is located on the second helical surface, the vertical groove segment is located on the third vertical surface, and the oblique groove segment is located on the fourth vertical surface; wherein the first horizontal surface is parallel to the second horizontal surface and is spaced apart.

3. The commutation structure according to claim 2, characterized in that: The first vertical plane is arranged in parallel with the second vertical plane, and the third vertical plane is arranged in parallel with the fourth vertical plane.

4. The commutation structure according to claim 2, characterized in that: The first vertical plane is arranged in parallel with the third vertical plane, and a distance between the first vertical plane and the third vertical plane is D1, wherein 0mm≤D1≤100mm.

5. The commutation structure according to claim 4, characterized in that: The distance between the first vertical surface and the third vertical surface is 19 mm, and a notch is formed below the first commutator.

6. The commutation structure according to any one of claims 1 to 5, characterized in that: The reference circle radius of the first spiral groove segment is R1, wherein 1 mm ≤ R1 ≤ 100 mm; and The reference circle radius of the second spiral groove segment is R2, wherein 1 mm ≤ R2 ≤ 100 mm.

7. The commutation structure according to claim 6, characterized in that: The angle between the central axis of the first spiral groove segment and the central axis of the second spiral groove segment is , where 10°≤ ≤80°, the pitch of the first spiral groove segment is , the pitch of the second spiral groove segment is .

8. The commutation structure according to any one of claims 1 to 5, characterized in that: In the extending direction of the horizontal slot segment, the length of the first commutator is smaller than the length of the second commutator.

9. The commutation structure according to any one of claims 1 to 5, characterized in that: The depth of the first commutation groove and the second commutation groove is H, wherein 0.01 mm≤H≤1 mm; and / or The width of the first reversing groove and the second reversing groove is D2, wherein 1 mm≤D2≤20 mm.

10. A high temperature superconducting undulator magnet structure, characterized in that: The invention comprises a plurality of switching structures according to any one of claims 1 to 9.

Images