CN204518206U - The non-linear magnet of the dizzy process of a kind of permanent magnetism bundle - Google Patents
The non-linear magnet of the dizzy process of a kind of permanent magnetism bundle Download PDFInfo
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- CN204518206U CN204518206U CN201520150314.XU CN201520150314U CN204518206U CN 204518206 U CN204518206 U CN 204518206U CN 201520150314 U CN201520150314 U CN 201520150314U CN 204518206 U CN204518206 U CN 204518206U
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- magnetic field
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- magnet
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Abstract
The utility model belongs to accelerator design technology, is specifically related to the non-linear magnet of the dizzy process of a kind of accelerator bundle.Its structure comprises four magnetic poles be oppositely arranged between two, magnetic field excitation component is provided with outside each magnetic pole, wherein, a pair shaded pole is provided with in the centre position of four magnetic poles, the cartridge of described shaded pole is plane, the magnetic field that plane cartridge produces is null field, and the magnetic field that the cartridge of four magnetic poles produces is line focus district or non-linear focused district; Described magnetic field excitation component comprises the permanent magnet as main field excitation and the excitation wire bag as auxiliary magnetic field excitation.Magnet provided by the utility model can produce a kind of null field in a big way and focusing field strength, thus a current bundle dizzy process difficult problem can be overcome, make the low density particle at edge focus on the high-density particles at the center that is added to, avoid the adverse effect of restrainting dizzy particle.
Description
Technical field
The utility model belongs to accelerator design technology, is specifically related to the non-linear magnet of the dizzy process of a kind of accelerator permanent magnetism bundle.
Background technology
The distribution of particles of the line lateral cross section (bundle spot) that accelerator produces is generally Gaussian Profile, and the distribution of particles of namely bombarding on target is uneven.The bundle spot of Gaussian Profile have the highdensity bundle core of a zonule and bundle core around the low-density bundle of large regions swoon.For the particle of middle low energy, the dizzy particle of bundle directly can keep off by collimater, but afterwards through to accelerate and after transmission, can produce again new bundle and to swoon particle.For high energy particle, larger radiation dose can be produced after the dizzy particle bombardment collimater of bundle and beam current tube, cause the activation of material.Therefore, the process of swooning of accelerator bundle is a very important problem.
At present, the process that domestic and international halved tie is swooned is all the method adopting collimater, and the problem of activation is difficult to basic solution.
Utility model content
The purpose of this utility model is the defect for prior art, provides the dizzy process of a kind of permanent magnetism bundle non-linear magnet, and halved tie particle of swooning focuses on, and makes the low density particle at edge focus on the high-density particles at the center that is added to, avoids the adverse effect of restrainting dizzy particle.
The technical solution of the utility model is as follows, the non-linear magnet of the dizzy process of a kind of permanent magnetism bundle, comprise four magnetic poles be oppositely arranged between two, each magnetic pole is provided with magnetic field excitation component, wherein, be provided with a pair shaded pole in the centre position of four magnetic poles, the cartridge of described shaded pole is plane, and the magnetic field that plane cartridge produces is null field; Described magnetic field excitation component comprises the permanent magnet as main field excitation and the excitation wire bag as auxiliary magnetic field excitation.
Further, the non-linear magnet of the dizzy process of permanent magnetism bundle as above, wherein, the cartridge of four described magnetic poles is hyperboloid or other curved surface.
Further, the non-linear magnet of the dizzy process of permanent magnetism bundle as above, wherein, the magnetic field that the cartridge of four described magnetic poles produces is line focus district or non-linear focused district.
Further, the non-linear magnet of the dizzy process of permanent magnetism bundle as above, wherein, the described excitation wire bag as auxiliary magnetic field excitation adjusts among a small circle the magnetic field of the permanent magnet institute excitation as main field excitation; When not needing adjustment in the magnetic field of described permanent magnet institute excitation, the described excitation wire bag as auxiliary magnetic field excitation can be cancelled.
Further, the non-linear magnet of the dizzy process of permanent magnetism bundle as above, wherein, the described permanent magnet as main field excitation is arranged in pole core, and the other parts in pole core except permanent magnet are the soft magnetic material for magnetic conduction; The described excitation wire bag as auxiliary magnetic field excitation is arranged on the outside of pole core.
The beneficial effects of the utility model are as follows: the null field, magnetic field that the cartridge of shaded pole of the present utility model produces does not have an impact to Particles Moving, focal zone, the magnetic field halved tie that the cartridge of four magnetic poles produces particle of swooning focuses on, thus make the low density particle at edge focus on the high-density particles at the center that is added to, avoid the adverse effect of restrainting dizzy particle.
Accompanying drawing explanation
Fig. 1 is four/a part of structural representation of magnet arrangement entirety in the utility model specific embodiment;
Fig. 2 is the Distribution of Magnetic Field schematic diagram (being depicted as the half of Distribution of Magnetic Field) in the utility model specific embodiment in X-axis;
Fig. 3 is the example Distribution of Magnetic Field figure of the dizzy particle of process bundle in the utility model specific embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
The utility model is the improvement that the basis of the quadrupole magnet adopted at accelerator is carried out, original quadrupole magnet comprises four magnetic poles 1 be oppositely arranged between two, be provided with excitation wire bag 3 outside each magnetic pole and pass into exciting current, as shown in Figure 1, in Fig. 1 be depicted as whole magnet four/part, full figure is about X-coordinate axle and Y-coordinate axial symmetry.The utility model adds a pair shaded pole 2 in the centre position of four magnetic poles, and its cartridge is plane, and the magnetic field making it produce is null field 4.The cartridge face of original quadrupole magnet magnetic pole 1 is hyperboloid, as (x-a) * y=b curve along Z-direction stretch the curved surface that formed, a and b be greater than zero constant; Also other curved surface can be designed to as required, as 3 (x-a)
2* y-y
3=b curve to stretch the curved surface formed along Z-direction, a and b be greater than zero constant.The magnetic field that magnetic pole produces is line focus district 5 (also can be designed to other non-linear focused district as required), 4 pairs, null field Particles Moving does not have an impact, halved tie particle of swooning in line focus district 5 focuses on, thus make the low density particle at edge focus on the high-density particles at the center that is added to, avoid the adverse effect of restrainting dizzy particle.
In addition, the magnetic field excitation of the utility model to magnetic pole have employed the permanent magnet 6 as main field excitation and the excitation wire bag 3 as auxiliary magnetic field excitation.Main field excitation refers to the main undertaker of magnetic field excitation, its material adopts permanent magnet 6, and its position can be placed in any appropriate location of pole core, as long as can encourage required Distribution of Magnetic Field, other parts in iron core are soft magnetic material, for the magnetic conduction of magnetic circuit; Auxiliary magnetic field excitation is for encouraging the magnetic field components needed for the size of adjustment magnetic field, and controlled by the electric current passing into excitation wire bag, if the magnetic field of main field excitation institute excitation does not need adjustment, then auxiliary magnetic field excitation can be cancelled.
When carrying out restrainting dizzy process, first beam cross section is needed to make very flat bundle, such as adopt traditional quadrupole magnet by while bundle spot in the Y direction pack, expand in X-direction, make the bundle spot of X-direction very large, and bundle spot is in the Y direction very little, this processing method was the most suitable before line is practiced shooting.Gaussian Profile shape curve in Fig. 3 is the particle density distribution situation of this line in X-axis.Be analogous to the result of Fig. 2, the ABC broken line in Fig. 3 is the Distribution of Magnetic Field in X-axis.Being wherein the bundle core part of line in AB interval, is the dizzy part of bundle outside AB interval.Under this magnetic fields, the particle density in AB interval is constant, and the particle outside AB interval is owing to being subject to line focus power, and the particle of A, B point is motionless, and the focusing force be more subject to away from the particle of A, B point is larger.Through the drift of certain distance, the dizzy particle of bundle will be added in bundle core, thus avoids halved tie and to swoon the collimation cutting of particle.
From the characteristic of quadrupole magnet, line, while X-direction focuses on superposition, often defocuses in the Y direction, but due to line very flat, therefore debunching force is in the Y direction very weak, can ignore.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if belong within the scope of the utility model claim and equivalent technology thereof to these amendments of the present utility model and modification, then the utility model is also intended to comprise these change and modification.
Claims (5)
1. the non-linear magnet of the dizzy process of permanent magnetism bundle, comprise four magnetic poles (1) be oppositely arranged between two, each magnetic pole is provided with magnetic field excitation component outside (1), it is characterized in that: be provided with a pair shaded pole (2) in the centre position of four magnetic poles (1), the cartridge of described shaded pole (2) is plane, and the magnetic field that plane cartridge produces is null field (4); Described magnetic field excitation component comprises the permanent magnet (6) as main field excitation and the excitation wire bag (3) as auxiliary magnetic field excitation.
2. the non-linear magnet of the dizzy process of permanent magnetism bundle as claimed in claim 1, is characterized in that: the cartridge of four described magnetic poles (1) is hyperboloid or other curved surface.
3. the non-linear magnet of the dizzy process of permanent magnetism bundle as claimed in claim 2, is characterized in that: the magnetic field that the cartridge of four described magnetic poles (1) produces is line focus district (5) or non-linear focused district.
4. the non-linear magnet of the dizzy process of permanent magnetism bundle as claimed in claim 1, is characterized in that: the described excitation wire bag (3) as auxiliary magnetic field excitation adjusts among a small circle the magnetic field of permanent magnet (6) the institute excitation as main field excitation; When not needing adjustment in the magnetic field of described permanent magnet (6) institute excitation, the described excitation wire bag (3) as auxiliary magnetic field excitation can be cancelled.
5. the non-linear magnet of the dizzy process of permanent magnetism bundle as claimed in claim 1, it is characterized in that: the described permanent magnet as main field excitation (6) is arranged in pole core, and the other parts in pole core except permanent magnet are the soft magnetic material for magnetic conduction; The described excitation wire bag (3) as auxiliary magnetic field excitation is arranged on the outside of pole core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520150314.XU CN204518206U (en) | 2015-03-17 | 2015-03-17 | The non-linear magnet of the dizzy process of a kind of permanent magnetism bundle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520150314.XU CN204518206U (en) | 2015-03-17 | 2015-03-17 | The non-linear magnet of the dizzy process of a kind of permanent magnetism bundle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204518206U true CN204518206U (en) | 2015-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520150314.XU Withdrawn - After Issue CN204518206U (en) | 2015-03-17 | 2015-03-17 | The non-linear magnet of the dizzy process of a kind of permanent magnetism bundle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204518206U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104684238A (en) * | 2015-03-17 | 2015-06-03 | 中国原子能科学研究院 | Permanent magnet beam halo processing nonlinear magnet |
-
2015
- 2015-03-17 CN CN201520150314.XU patent/CN204518206U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104684238A (en) * | 2015-03-17 | 2015-06-03 | 中国原子能科学研究院 | Permanent magnet beam halo processing nonlinear magnet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150729 Effective date of abandoning: 20180525 |
|
| AV01 | Patent right actively abandoned |