CN216217687U - Multipurpose combined magnet with grooved magnetic pole - Google Patents

Abstract

The application discloses multipurpose combination magnet with recessed magnetic pole, this magnet includes: the magnetic yoke comprises a magnetic yoke and four magnetic poles positioned in the magnetic yoke, wherein the four magnetic poles are arranged in a pairwise opposite mode, a corresponding groove is formed in the central area of each magnetic pole, the opening part of each groove in the four grooves points to the center of the same magnetic pole, and a corresponding excitation coil assembly is arranged on each magnetic pole. The utility model provides a multipurpose combination magnet with recessed magnetic pole, because the recess that corresponds is seted up in the central zone of every magnetic pole, not only can improve the magnetic field quality in order to improve the regional magnetic field degree of consistency of central zone, can regard as the light guide passageway of light beam through the recess moreover, satisfy the demand of light guide, solve the problem of space interference, and with low costs, have very strong suitability.

Description

Multipurpose combined magnet with grooved magnetic pole

Technical Field

The utility model relates to the technical field of magnetic field control, in particular to a multipurpose combined magnet with a groove magnetic pole.

Background

A High Energy Photon Source (HEPS) is a large scientific device for generating synchronous radiation, and is a High-performance novel strong light Source which generates synchronous radiation when electrons deflect in a magnetic field, electrons moving at a speed close to the speed of light move on an annular track of a storage ring at a constant speed and in a variable direction through magnetic fields with different intensities, and electromagnetic radiation with excellent performance is generated. In order to efficiently generate synchrotron radiation, a large number of fast-correctors need to be placed in the storage loop of the HEPS to generate various types of magnetic fields to regulate the beam current to travel on its trajectory.

At present, a Brazilian light source adopts a related technology to generate radiation light, however, a magnet in the Brazilian light source has poor magnetic field quality in a good field area, and meanwhile, the requirement of light guiding cannot be met in a certain area of an off-beam; in addition, the magnet in some light sources adopts an eight-stage substructure to generate magnetic fields in different directions, but the magnet is not only complex in structure but also high in cost, and because of more pole heads, the distance between adjacent magnetic poles in the horizontal direction is small, and the light guide in some areas cannot be avoided.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned deficiencies or inadequacies of the prior art, it would be desirable to provide a multi-purpose combination magnet with recessed poles that not only produces high quality horizontal, vertical, and oblique quadrupole magnetic fields, but also provides a light-guiding channel for the light beam.

The embodiment of the application provides a multipurpose combined magnet with recessed magnetic pole, includes: the magnetic yoke comprises a magnetic yoke and four magnetic poles positioned in the magnetic yoke, wherein the four magnetic poles are arranged in a pairwise opposite mode, a corresponding groove is formed in the central area of each magnetic pole, the opening part of each groove in the four grooves points to the center of the same magnetic pole, and a corresponding excitation coil assembly is arranged on each magnetic pole.

In another embodiment of the present application, a first pole surface and a second pole surface connected to the first pole surface are disposed at two ends of the opening portion of the groove.

In another embodiment of this application, first pole face is the cambered surface, the cambered surface from the groove top of recess outwards extend to with the second pole face is connected.

In another embodiment of the present application, the second pole surface is a line surface, and the line surface is connected with the arc surface.

In another embodiment of the present application, the opening corresponding to the groove of each magnetic pole has the same size, and the first pole face and the second pole face have the same shape.

In another embodiment of the present application, each of the excitation coil assemblies includes a first excitation coil and a second excitation coil, and the four magnetic poles cooperate with four of the first excitation coils to generate a quadrupole gradient magnetic field; two magnetic poles which are oppositely arranged in the four magnetic poles are matched with the two corresponding second exciting coils to generate a horizontal magnetic field and a vertical magnetic field.

In another embodiment of the present application, a coil diameter of the first excitation coil is larger or smaller than a coil diameter of the second excitation coil.

In another embodiment of the present application, four first excitation coils corresponding to the four magnetic stages are connected in series.

In another embodiment of the present application, two of the second excitation coils corresponding to two of the four magnetic poles that are disposed opposite to each other are connected in series.

In another embodiment of the present application, the first pole surface is a hyperboloid or a circular arc surface.

To sum up, the multipurpose combined magnet with the magnetic poles with the grooves comprises a magnetic yoke and four magnetic poles located inside the magnetic yoke, wherein the four magnetic poles are oppositely arranged in pairs, corresponding grooves are formed in the central area of each magnetic pole, the opening parts of the grooves in the four grooves point to the center of the same magnetic pole, and corresponding exciting coil assemblies are arranged on each magnetic pole. This multipurpose combination magnet with recessed magnetic pole's four magnetic poles adopt the relative quadrupole structure that sets up of two liang of magnetic poles, owing to set up corresponding recess in the central zone of every magnetic pole, not only can improve the magnetic field quality in order to improve central zone level and perpendicular magnetic field degree of consistency, can regard as the light guide channel of light beam through the recess moreover, have satisfied the demand of light guide, have solved the problem of space interference, and with low costs, have very strong suitability.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 is a schematic structural diagram of a multipurpose combined magnet with recessed magnetic poles according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an internal structure of a multipurpose combined magnet with recessed poles without an exciting coil assembly installed therein according to an embodiment of the present application;

FIG. 3 is a mechanical diagram of a multipurpose combined magnet with recessed poles for mounting an excitation coil assembly according to another embodiment of the present application;

FIG. 4 is a schematic structural diagram of an embodiment of the present application for generating a skewed quadrupole magnetic field;

FIG. 5 is a schematic diagram of a structure for generating a magnetic field in a vertical direction according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a structure for generating a magnetic field in a horizontal direction according to an embodiment of the present disclosure;

description of reference numerals:

1-magnetic yoke, 2-magnetic pole, 3-exciting coil component, 4-magnetic pole center, 21-groove, 22-first pole face, 23-second pole face, 31-first exciting coil, 32-second exciting coil, 41-beam region, 42-light guide region, 211-opening part, 311-oblique four-pole exciting coil 321-vertical exciting coil and 322-horizontal exciting coil.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not to be construed as limiting the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort are within the protection scope of the present application.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described are capable of operation in sequences other than those illustrated or otherwise described herein.

Moreover, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not explicitly listed that are inherent to such process, method, article, or apparatus.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

It can be understood that HEPS can provide high-performance, high-brightness hard x-rays, can meet the requirements of research related to national development strategy and industrial core requirements, and has been widely used in development and application research of microelectronics, medicine, petroleum, chemical engineering, bioengineering, microfabrication, and the like.

At present, some light sources adopt related magnet technologies to realize horizontal, vertical and oblique quadrupole magnetic fields, however, the magnet in the light source has poor magnetic field quality in a beam area, and meanwhile, the requirement of light guiding cannot be met in a certain area away from the beam; in addition, the magnet of some light sources adopts an eight-stage substructure to generate a magnetic field with the same requirement, but the magnet is not only complex in structure but also high in cost, because of more magnetic poles and small space between adjacent magnetic poles in the horizontal direction, the light guiding in some areas cannot be avoided, and meanwhile, in order to increase the space of a required coil, the aperture needs to be increased, so that the utilization rate of the magnetic field in the aperture is low.

Based on above-mentioned defect, the multipurpose combination magnet with recess magnetic pole that this application provided, through the quadrupole structure that adopts two liang of magnetic poles to set up with four magnetic poles, and owing to set up corresponding recess in the central zone of every magnetic pole, not only can improve the magnetic field quality in order to improve level, the perpendicular magnetic field degree of consistency, can regard as the light guide passageway of light beam through the recess moreover, satisfied the demand of light guide, solved the problem of space interference, and with low costs, there is very strong suitability.

It should be noted that the accelerator magnet refers to a magnet that gives a bending force to a particle to move the particle along a given central orbit while controlling the orbit of the particle during acceleration, and gives a focusing force to the particle to prevent the particle from deviating from the central orbit and returning to the central orbit without being lost. The deflection, focusing and beam current transport of charged particles can not leave the magnet. The main magnet of the particle accelerator is a main component for controlling the movement of charged particles, and directly influences the movement state, final energy and beam characteristics of the accelerated particles of the accelerator.

The multipurpose combined magnet with the groove magnetic poles can be used as a correcting magnet, is a basic component for guiding and restraining charged particle beams on an accelerator, is an important component of the accelerator, is used for accurately correcting beam positions, plays a key role in indexes such as beam emittance and dynamic aperture of the accelerator, and can be applied to high-energy synchrotron radiation light sources and the like.

For ease of understanding and explanation, the multipurpose combined magnet with recessed magnetic poles provided by the embodiments of the present application is explained in detail below with reference to fig. 1 to 6.

Fig. 1 is a schematic structural diagram of a multipurpose combined magnet with recessed magnetic poles according to an embodiment of the present application, as shown in fig. 1, the magnet includes: the magnetic yoke 1 and four magnetic poles 2 located inside the magnetic yoke 1, the four magnetic poles 2 are arranged oppositely in pairs, a corresponding groove 21 is formed in the central area of each magnetic pole 2, the opening part 211 of each groove 21 in the four grooves 21 points to the same magnetic pole center 4, and a corresponding excitation coil assembly 3 is arranged on each magnetic pole 2.

In the present embodiment, the yoke 1, which is a housing of the multipurpose combined magnet having the recessed magnetic poles, is a ferromagnetic material that does not generate a magnetic field or magnetic lines of force by itself and only transmits magnetic lines of force in a magnetic circuit. The magnetic yoke can be used for restricting the magnetic lines of force generated by the exciting coil to be dispersed outwards, shortening the magnetic circuit, improving the magnetic field of the central area, and concentrating the magnetic line of force in the exciting coil to improve the exciting efficiency and play a role in magnetic shielding. Optionally, the magnetic yoke 1 may be made of soft iron (electrical pure iron) with high magnetic permeability, a silicon steel sheet, or a soft magnetic alloy, and in some special occasions, the magnetic yoke may also be made of a ferrite material. The shape of the yoke 1 may be square.

The multipurpose combined magnet with the groove magnetic poles adopts a quadrupole structure, the number of the magnetic poles 2 is four, the magnetic poles 2 are positioned in the magnetic yoke 1, the magnetic poles 2 are the key parts determining the magnetic field performance on the magnet, can adopt a magnetic conductive material, and can be made of electrician pure iron, silicon steel sheets or iron, cobalt, nickel and other alloy materials. In this embodiment, the four magnetic poles 2 are oppositely arranged in pairs, and the four magnetic poles have equal sizes and shapes, a corresponding groove 21 is formed in the central region of each magnetic pole 2 of the four magnetic poles, the opening part 211 of each groove 21 of the four grooves points to the same magnetic pole center 4, the magnetic pole center 4 is located in the central region of the multipurpose combined magnet with the groove magnetic poles, and the magnetic pole center can also be called as a beam area of the multipurpose combined magnet with the groove magnetic poles.

The groove 21 can provide a light guide gap, can be used as a light guide channel of a light beam, and also improves the magnetic field quality, thereby meeting the physical requirements of beam current and the space requirements of light guide. It should be noted that the beam region serves as a passage for the charged particle beam, and the charged particle beam can be combined into one beam with the same track and direction after being deflected by the accelerator magnet.

The multipurpose combined magnet with the groove magnetic poles, provided by the embodiment of the application, comprises a magnetic yoke and four magnetic poles located inside the magnetic yoke, wherein the four magnetic poles are oppositely arranged in pairs, a corresponding groove is formed in the central area of each magnetic pole, the opening part of each groove in the four grooves points to the center of the same magnetic pole, and a corresponding excitation coil assembly is arranged on each magnetic pole. This multipurpose combination magnet with recessed magnetic pole's four magnetic poles adopt the level four substructure that two liang of magnetic poles set up relatively, owing to set up corresponding recess in the central zone of every magnetic pole, not only can improve the magnetic field quality in order to improve level, perpendicular magnetic field degree of consistency, can regard as the light guide channel of light beam through the recess moreover, have satisfied the demand of light guide, have solved the problem of space interference, and with low costs, have very strong suitability.

Further, on the basis of the above embodiments, please refer to fig. 2, fig. 2 is a schematic structural diagram of the multipurpose combined magnet with recessed magnetic poles without the exciting coil assembly. The opening 211 of the recess 21 is provided with a first pole face 22 and a second pole face 23 connected to the first pole face 22 at both ends for each of the four magnetic poles 2. Wherein, the first pole face 22 is a cambered surface, and the cambered surface extends outwards from the groove top of the groove to be connected with the second pole face 23. Optionally, the first pole face may be an approximate hyperbolic arc face. The second pole surface 23 is a line surface, and the line surface is connected with the arc surface.

For each of the four magnetic poles, two corresponding first pole faces 22 and two corresponding second pole faces 23 are respectively arranged at two ends of an opening portion of the groove, each end is correspondingly provided with one first pole face 22 and one second pole face 23, the opening portions 211 corresponding to the grooves are the same in size, and the first pole face 22 and the second pole face 23 are the same in shape. The size of the opening 211 can be customized according to the actual required gap size of the light guide area, as long as the opening 211 can provide a light guide channel for a light beam or provide a space for installing other components.

Further, as shown in fig. 1 and fig. 3, each magnetic pole 2 is provided with a corresponding excitation coil assembly 3, and the excitation coil assembly 3 can be sleeved outside the magnetic pole 2 and fixed with the corresponding magnetic pole 2. Each exciting coil assembly 3 includes a first exciting coil 31 and a second exciting coil 32 for each of the four magnetic poles. The coil diameter of the first exciting coil 31 may be larger than that of the second exciting coil 32, or the coil diameter of the first exciting coil 31 may be smaller than that of the second exciting coil 32, and the first exciting coil 31 is an outer coil far from the magnetic pole center 4 and may be an oblique quadrupole exciting coil 311; the second exciting coil is an inner coil located closer to the pole center 4, and may include a vertical exciting coil 321 and a horizontal exciting coil 322. The first exciting coil 31 is used for cooperating with the magnetic pole to generate a slant quadrupole magnetic field, and the second exciting coil 32 is used for cooperating with the magnetic pole to generate a horizontal magnetic field and a vertical magnetic field.

The multipurpose combined magnet with the groove magnetic poles comprises a beam area 41 and a light guide area 42, the light guide area is very close to the beam center of the beam area, in order to reasonably avoid a light guide channel, the groove can be used for providing the light guide area for a light beam to establish a corresponding light guide channel, and the beam area is positioned in the magnetic center area of the multipurpose combined magnet with the groove magnetic poles, so that charged particles or the beam can have the effect caused by magnetic fields in different directions in an accelerator, and the charged particles or the beam can have a beam with the same track and direction.

The vertical excitation coil 321, the horizontal excitation coil 322 and the oblique quadrupole excitation coil 311 are all devices which work on the principle that the excitation coil is electrified to generate a magnetic field, the oblique quadrupole excitation coil 311, the vertical excitation coil 321 and the horizontal excitation coil 322 can be fixedly arranged on a magnetic pole, and when current flows through the excitation coil, a certain magnetic field can be generated in a beam area.

Referring to fig. 4-6, the four magnetic poles and the four first exciting coils cooperate with each other to generate a gradient quadrupole magnetic field, that is, the outer coils of the four magnetic poles are connected in series to generate a gradient quadrupole magnetic field. Two magnetic poles which are oppositely arranged in the four magnetic poles are matched with the two corresponding second exciting coils to generate a horizontal magnetic field and a vertical magnetic field. The oblique quadrupole excitation coils 311 are connected in series to generate an oblique quadrupole magnetic field; two exciting coils corresponding to two oppositely arranged magnetic poles in the four magnetic poles are mutually connected in series, namely, horizontal exciting coils 322 corresponding to an upper magnetic pole and a lower magnetic pole in the four magnetic poles are mutually connected in series to generate a magnetic field in the vertical direction; the vertical exciting coils 321 corresponding to the left and right magnetic poles are connected in series to generate a magnetic field in the horizontal direction.

In addition, the particle accelerator includes a plurality of types of main magnets, including a dipole magnet for bending the charged particles, a quadrupole magnet for focusing the charged particles, and a hexapole magnet for de-dispersing the charged particles. The multipurpose combined magnet with the recessed magnetic poles provided in the application is a correcting magnet for accurately correcting the beam position.

In the embodiment, the groove is arranged in the central area of the pole face of the magnetic pole facing the beam area, so that the horizontal and vertical integral magnetic field uniformity of the beam area can be improved, a space is reserved for a light guide area, which is very critical to the extraction of light beams on a light source, and the problem of space interference is solved; and the first polar surfaces at the two ends of the groove on the magnetic pole are arranged to be similar to a hyperbolic curve, so that a high-quality oblique four-stage magnetic field can be obtained, and the second polar surfaces connected with the hyperbolic arc surface of the magnetic yoke are arranged to be straight lines, so that the excitation coil assembly corresponding to the magnetic pole can be conveniently installed. Compared with the prior art, the multipurpose combined magnet with the groove magnetic poles is simple in structure and low in required cost, the magnetic field quality can be improved through the grooves of the magnetic poles, and other parts can be installed through the grooves, so that the physical requirements and the space requirements of beam current can be met simultaneously, and the magnet utilization rate is further improved.

The terms "above," "left," "right," and the like, as used herein, are used in the sense of referring to the orientation or positional relationship shown in the drawings, and are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (10)

1. A multi-purpose composite magnet having recessed poles, the magnet comprising: the magnetic yoke comprises a magnetic yoke and four magnetic poles positioned in the magnetic yoke, wherein the four magnetic poles are arranged in a pairwise opposite mode, a corresponding groove is formed in the central area of each magnetic pole, the opening part of each groove in the four grooves points to the center of the same magnetic pole, and a corresponding excitation coil assembly is arranged on each magnetic pole.

2. The multipurpose composite magnet having a recessed magnetic pole as claimed in claim 1, wherein a first pole face and a second pole face connected to the first pole face are provided at both ends of the opening portion of the recess.

3. The multi-purpose composite magnet with recessed poles as claimed in claim 2, wherein said first pole face is an arc face extending outward from the top of said recess to connect with said second pole face.

4. The multipurpose combined magnet with recessed poles as claimed in claim 3, wherein said second pole face is a line face, and said line face is connected with said arc face.

5. The multipurpose combined magnet with recessed magnetic poles as claimed in claim 4, wherein the size of the opening corresponding to the recess of each magnetic pole is the same, and the shape of the first pole face is the same as that of the second pole face.

6. The multipurpose sectional magnet with recessed poles according to claim 1, wherein each of said exciting coil assemblies comprises a first exciting coil and a second exciting coil, and said four poles and four of said first exciting coils cooperate to generate a quadrupole field; two magnetic poles which are oppositely arranged in the four magnetic poles are matched with the two corresponding second exciting coils to generate a horizontal magnetic field or a vertical magnetic field.

7. The multipurpose sectional magnet with recessed poles according to claim 6, wherein the coil diameter of the first exciting coil is larger or smaller than the coil diameter of the second exciting coil.

8. The multipurpose sectional magnet having recessed magnetic poles according to claim 6, wherein four of the first exciting coils corresponding to the four magnetic poles are connected in series with each other.

9. The multipurpose combined magnet with recessed magnetic poles according to claim 6, wherein two of the second exciting coils corresponding to two of the four magnetic poles which are oppositely disposed are connected in series with each other.

10. The multipurpose combined magnet with a recessed magnetic pole according to any one of claims 2 or 3, wherein the first pole surface is a hyperboloid or a circular arc surface.

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