CN204303492U - A kind of accelerator line homogenising six pole magnet - Google Patents
A kind of accelerator line homogenising six pole magnet Download PDFInfo
- Publication number
- CN204303492U CN204303492U CN201420801285.4U CN201420801285U CN204303492U CN 204303492 U CN204303492 U CN 204303492U CN 201420801285 U CN201420801285 U CN 201420801285U CN 204303492 U CN204303492 U CN 204303492U
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- magnet
- excitation wire
- homogenising
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Abstract
The utility model belongs to accelerator design technology, is specifically related to a kind of accelerator line homogenising six pole magnet.This six pole magnet deletes the excitation wire bag of a pair relative magnetic pole on the basis of traditional design, and shortens this to the distance between magnetic pole, changes the sense of current of a pair adjacent pole line bag simultaneously.The magnetic field that this magnet can produce in X-axis is symmetrical about the origin of coordinates, the size in magnetic field and position square proportional, can provide good uniformization effect to the bundle spot of class triangle Density Distribution.
Description
Technical field
The utility model belongs to accelerator design technology, is specifically related to a kind of accelerator line homogenising six pole magnet.
Background technology
The distribution of particles of the line lateral cross section that accelerator produces is generally Gaussian Profile, and the distribution of particles of namely bombarding on target is uneven.In some industrial electronic irradiation occasion, line irradiation evenness is required it is very high, such as, to the irradiation of semi-conducting material.In addition, when the line bombardment target of the high power density of heavy ion avcceleration generation, in order to reduce the size of target and realize the cooling of target, need while bundle spot expands, integer of being tried one's best by line is equally distributed.Therefore, the homogenising of accelerator line is a very important problem.
At present, the line homogenising device adopted both at home and abroad is divided into non-linear multipole iron and non-linear ladder field dipolar magnet two class.Non-linear multipole iron has ends of the earth iron and 12 pole iron etc., and non-linear ladder field dipolar magnet is divided into separate unit rank and multiple stage rank.
Because non-linear multipole iron introduces very strong non-linear effectiveness in the process of carrying out line homogenising, its result is not fully up to expectations.The target of non-linear ladder field dipolar magnet homogenising is that the particle isodensity of line marginal portion is moved to interior zone, but the line of its translation is uneven, when translation superposes, that high density superposes with higher density, low-density superposes with more low-density, and the uniformity after its superposition is not still fine.
Utility model content
The purpose of this utility model is the defect for prior art, provides a kind of accelerator line homogenising six pole magnet structure, makes bundle spot have better uniformization effect.
The technical solution of the utility model is as follows: a kind of accelerator line homogenising six pole magnet, six magnetic poles of magnet are annularly arranged between two relatively, wherein, two relative magnetic poles do not arrange excitation wire bag, all the other magnetic poles is arranged excitation wire bag and pass into exciting current; Arrange at two the magnetic direction produced in the adjacent pole of excitation wire bag contrary, two interior magnetic directions produced of opposing polarities arranging excitation wire bag are identical, thus form the Distribution of Magnetic Field relative to magnet centerline symmetry.
Further, accelerator line homogenising six pole magnet as above, wherein, the distance between the opposing polarities not arranging excitation wire bag is less than the distance between the opposing polarities arranging excitation wire bag.
Further, accelerator line homogenising six pole magnet as above, wherein, the magnetic direction produced in described magnetic pole refers to if it is positive direction that magnetic direction points to magnetic blow out centre, if it is negative direction that magnetic direction leaves magnetic blow out centre.
The beneficial effects of the utility model are as follows: six pole magnet provided by the utility model, it is the excitation wire bag deleting a pair relative magnetic pole on the basis of traditional six pole magnet, and shorten this to the distance between magnetic pole, change the sense of current of a pair adjacent pole line bag simultaneously.The magnetic field that this magnet can produce in X-axis is symmetrical about the origin of coordinates, the size in magnetic field and position square proportional, can provide good uniformization effect to the bundle spot of class triangle Density Distribution.
Accompanying drawing explanation
Fig. 1 is the structural representation of six pole magnet in the utility model embodiment;
Fig. 2 is the six pole magnet Distribution of Magnetic Field schematic diagram compared with the prior art of the utility model embodiment;
Fig. 3 is the line initial density distribution schematic diagram adopting six pole magnet of the present utility model to be formed;
Fig. 4 is the light path schematic diagram of line;
Fig. 5 is optical line terminal bundle spot schematic diagram.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in detail.
The utility model is the improvement carried out on the basis of traditional six pole magnet, six magnetic poles of tradition six pole magnet are annularly symmetrical arranged between two relatively, excitation wire bag is equipped with outside each magnetic pole, and the distance between relative two magnetic poles is all equal, magnetic direction in adjacent pole is contrary, magnetic direction in opposing polarities is also contrary, the Distribution of Magnetic Field of this six pole magnet is about the plane symmetry through magnet centerline, as shown in the A curve in Fig. 2, the size in magnetic field and position square proportional.
As shown in Figure 1, the technical solution of the utility model is removed by the excitation wire bag on a pair of six pole magnet relative magnetic pole 1,2, and by reverse relative to the electric current of traditional six pole magnet for the excitation wire bag 7,8 of a pair adjacent magnetic pole 3,4, make the magnetic direction that arranges in the adjacent pole in 4 magnetic poles of excitation wire bag contrary, magnetic direction in opposing polarities is identical, thus form a kind of Distribution of Magnetic Field about magnet centerline symmetry, magnet centerline, perpendicular to Fig. 1 paper, is positioned at magnet center.The magnetic direction produced in described magnetic pole refers to if it is positive direction that magnetic direction points to magnetic blow out centre, if it is negative direction that magnetic direction leaves magnetic blow out centre.Magnetic field profile is the quadratic function about position coordinates.The Distribution of Magnetic Field of traditional six pole magnet is about the plane symmetry through magnet centerline, as shown in the A curve in Fig. 2, and the size in magnetic field and position square proportional.Distribution of Magnetic Field of the present utility model is as shown in the B curve in Fig. 2, identical with A curve in the side of central point, and opposite side is equal with the absolute value of A curve, but direction is contrary.Field distribution of the present utility model all can provide focussing force to the edge particles on both sides, is equivalent to beam focusing element.Traditional six pole magnet forms Distribution of Magnetic Field A curve, to particle focus on, then defocusing of another side, has the effect of a uneven deflection to line.
Relative to traditional six pole magnet, the distance between two magnetic poles removing excitation wire bag of the present utility model needs corresponding reduction, to obtain the curve B of Fig. 2 middle ideal.That is, the distance between relative two magnetic poles 1,2 is less than the distance between relative two magnetic poles 3,6 and relative two magnetic poles 4,5, and the distance between magnetic pole 3,6 and the distance between magnetic pole 4,5 keep equal.
Magnet of the present utility model can provide good uniformization effect to the bundle spot of class triangle Density Distribution, and Gaussian Profile belongs to the one of class angular distribution.
Embodiment
The pole pitch of the six pole magnet that the present embodiment provides as shown in Figure 1, distance wherein between magnetic pole 3,6 is identical with the distance between magnetic pole 4,5, all 5cm, distance between magnetic pole 1,2 is 1.1cm, magnetic pole 1,2 does not arrange excitation wire bag, all the other magnetic poles 3,4,5,6 arranges excitation wire bag and passes into exciting current.The magnetic direction produced in the opposing polarities 3,6 that two arrange excitation wire bag 7,10 and two other to arrange the magnetic direction produced in the opposing polarities 4,5 of excitation wire bag 8,9 contrary, the magnetic direction produced in opposing polarities 3,6 (or 4,5) is identical, thus forms the Distribution of Magnetic Field relative to magnet centerline symmetry.The initial density distribution of line is Gaussian Profile, as shown in Figure 3.Beam optics as shown in Figure 4, view top is divided into the bundle envelope of X-Z plane, and view bottom is divided into the bundle envelope of Y-Z plane, S1 and S2 is wherein six pole magnet of the present utility model, magnet a such as position of Fig. 1 is placed, and the magnet 90-degree rotation of Fig. 1 is placed by another magnet.In Fig. 4, the optical line terminal bundle spot of the rightmost side as shown in Figure 5, is all the square bundle spot of 200mm at the beam spot size of X and Y-direction.
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 (3)
1. an accelerator line homogenising six pole magnet, six magnetic poles of magnet are annularly arranged between two relatively, it is characterized in that: two relative magnetic poles (1,2) do not arrange excitation wire bag, all the other magnetic poles (3,4,5,6) is arranged excitation wire bag (7,8,9,10) and pass into exciting current; Arrange at two the magnetic direction produced in the adjacent pole of excitation wire bag contrary, two interior magnetic directions produced of opposing polarities arranging excitation wire bag are identical, thus form the Distribution of Magnetic Field relative to magnet centerline symmetry.
2. accelerator line homogenising six pole magnet as claimed in claim 1, is characterized in that: the distance between the opposing polarities (1,2) that excitation wire bag is not set be less than excitation wire bag is set opposing polarities (3,6) between distance.
3. accelerator line homogenising six pole magnet as claimed in claim 2, it is characterized in that: the magnetic direction produced in described magnetic pole (3,4,5,6) refers to if it is positive direction that magnetic direction points to magnetic blow out centre, if it is negative direction that magnetic direction leaves magnetic blow out centre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420801285.4U CN204303492U (en) | 2014-12-16 | 2014-12-16 | A kind of accelerator line homogenising six pole magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420801285.4U CN204303492U (en) | 2014-12-16 | 2014-12-16 | A kind of accelerator line homogenising six pole magnet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204303492U true CN204303492U (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420801285.4U Withdrawn - After Issue CN204303492U (en) | 2014-12-16 | 2014-12-16 | A kind of accelerator line homogenising six pole magnet |
Country Status (1)
| Country | Link |
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| CN (1) | CN204303492U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681230A (en) * | 2014-12-16 | 2015-06-03 | 中国原子能科学研究院 | Beam homogenizing sextupole magnet for accelerator |
| CN110113857A (en) * | 2019-02-27 | 2019-08-09 | 中国科学技术大学 | A kind of four sextupole magnetic field magnet of combination with chromaticity correction performance |
| CN114388219A (en) * | 2022-01-21 | 2022-04-22 | 北京高能锐新科技有限责任公司 | Coreless dipolar magnet for positive and negative electronic collider intensifier |
-
2014
- 2014-12-16 CN CN201420801285.4U patent/CN204303492U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104681230A (en) * | 2014-12-16 | 2015-06-03 | 中国原子能科学研究院 | Beam homogenizing sextupole magnet for accelerator |
| CN110113857A (en) * | 2019-02-27 | 2019-08-09 | 中国科学技术大学 | A kind of four sextupole magnetic field magnet of combination with chromaticity correction performance |
| CN110113857B (en) * | 2019-02-27 | 2020-08-25 | 中国科学技术大学 | Combined four-six-pole magnetic field magnet with chromaticity correction performance |
| CN114388219A (en) * | 2022-01-21 | 2022-04-22 | 北京高能锐新科技有限责任公司 | Coreless dipolar magnet for positive and negative electronic collider intensifier |
| CN114388219B (en) * | 2022-01-21 | 2022-09-09 | 北京高能锐新科技有限责任公司 | Coreless dipolar magnet for positive and negative electronic collider intensifier |
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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: 20150429 Effective date of abandoning: 20170329 |
|
| AV01 | Patent right actively abandoned |