CN204518207U - A kind of permanent magnetism line homogenizing six pole magnet - Google Patents
A kind of permanent magnetism line homogenizing six pole magnet Download PDFInfo
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- CN204518207U CN204518207U CN201520151412.5U CN201520151412U CN204518207U CN 204518207 U CN204518207 U CN 204518207U CN 201520151412 U CN201520151412 U CN 201520151412U CN 204518207 U CN204518207 U CN 204518207U
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Abstract
The utility model belongs to accelerator design technology, is specifically related to a kind of accelerator permanent magnetism line homogenizing six pole magnet.This six pole magnet eliminates the magnetic field excitation of a pair relative magnetic pole on the basis of traditional design, and shortens this to the distance between magnetic pole, changes the magnetic field excitation direction in a pair adjacent pole simultaneously.Magnetic field excitation component comprises the permanent magnet as main field excitation and the excitation wire bag as auxiliary magnetic field excitation.The magnetic field that the utility model 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 permanent magnetism line homogenizing 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 homogenizing of accelerator line is a very important problem.
At present, the line homogenizing 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 homogenizing, its result is not fully up to expectations.The target of non-linear ladder field dipolar magnet homogenizing 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 permanent magnetism line homogenizing six pole magnet structure, makes bundle spot have better uniformization effect.
The technical solution of the utility model is as follows: a kind of permanent magnetism line homogenizing six pole magnet, and six magnetic poles of magnet are annularly arranged between two relatively, wherein, two relative magnetic poles does not arrange magnetic field excitation component, all the other magnetic poles is arranged magnetic field excitation component; Arrange at two the magnetic direction produced in the adjacent pole of magnetic field excitation component contrary, two interior magnetic directions produced of opposing polarities arranging magnetic field excitation component are identical, thus form the Distribution of Magnetic Field relative to magnet centerline symmetry; Described magnetic field excitation component comprises the permanent magnet as main field excitation and the excitation wire bag as auxiliary magnetic field excitation.
Further, accelerator line homogenizing six pole magnet as above, wherein, the distance between the opposing polarities not arranging magnetic field excitation component is less than the distance between the opposing polarities arranging magnetic field excitation component.
Further, accelerator line homogenizing six pole magnet 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, accelerator line homogenizing 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.
Further, accelerator line homogenizing six pole magnet as above, wherein, the described permanent magnet as main field excitation is arranged on pole core inside, and the other parts in pole core except permanent magnet are soft magnetic material; 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: six pole magnet provided by the utility model, it is the magnetic field excitation 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 magnetic field excitation direction of a pair adjacent pole 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.
Embodiment
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 the adjacent magnetic pole be excited 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 the magnetic field excitation on a pair of six pole magnet relative magnetic pole 1,2, and by reverse relative to the excitation field of traditional six pole magnet for the excitation field of a pair adjacent magnetic pole 3,4, make the magnetic direction that arranges in the adjacent pole in 4 magnetic poles of magnetic field excitation 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 field excitation component of the utility model set by magnetic pole comprises the permanent magnet as main field excitation and the excitation wire bag as auxiliary magnetic field excitation.Main field excitation refers to the main undertaker of magnetic field excitation, and its material adopts permanent magnet, and its position can be placed in any appropriate location in pole core, as long as can encourage the magnetic field shown in Fig. 1; Auxiliary magnetic field excitation is the adjustment carrying out among a small circle to the magnetic field of main field excitation institute excitation, controlled by the electric current passing into excitation wire bag, the change such as departing from required excitation intensity or beam spot size in the actual excitation intensity of main field excitation requires the situations such as magnetic field excitation intensity change, if the magnetic field of main field excitation institute excitation does not need adjustment, then auxiliary magnetic field excitation can be cancelled.
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 magnetic field excitation 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 poles head cross section curve is identical with traditional six pole magnet, is binary cubic curve.
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 magnetic field excitation component, all the other magnetic poles 3,4,5,6 arrange magnetic field excitation component.The magnetic direction produced in the opposing polarities 3,6 that two arrange magnetic field excitation component 7,10 and two other to arrange the magnetic direction produced in the opposing polarities 4,5 of magnetic field excitation component 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.Magnetic field excitation component comprises as the permanent magnet 11,12,13,14 of main field excitation and the excitation wire bag 7,8,9,10 as auxiliary magnetic field excitation, permanent magnet 11,12,13,14 is separately positioned in the iron core of magnetic pole 3,4,5,6, excitation wire bag 7,8,9,10 is separately positioned on the outside of magnetic pole 3,4,5,6 iron core, permanent magnet 11,12,13,14 is main undertakers of magnetic field excitation, form the magnetic direction required for the utility model, excitation wire bag 7,8,9,10 plays the corrective action in magnetic field.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 (5)
1. a permanent magnetism line homogenizing 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 magnetic field excitation component, and (3,4,5,6) arrange magnetic field excitation component to all the other magnetic poles; Arrange at two the magnetic direction produced in the adjacent pole of magnetic field excitation component contrary, two interior magnetic directions produced of opposing polarities arranging magnetic field excitation component are identical, thus form the Distribution of Magnetic Field relative to magnet centerline symmetry; Described magnetic field excitation component comprises the permanent magnet (11,12,13,14) as main field excitation and the excitation wire bag (7,8,9,10) as auxiliary magnetic field excitation.
2. accelerator line homogenizing six pole magnet as claimed in claim 1, is characterized in that: the distance between the opposing polarities (1,2) that magnetic field excitation component is not set be less than magnetic field excitation component is set opposing polarities (3,6) between distance.
3. accelerator line homogenizing six pole magnet as claimed in claim 1 or 2, is characterized in that: the described excitation wire bag as auxiliary magnetic field excitation (7,8,9,10) adjusts among a small circle the magnetic field of permanent magnet (11,12,13,14) the 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 (7,8,9,10) can be cancelled.
4. accelerator line homogenizing six pole magnet as claimed in claim 1, 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.
5. accelerator line homogenizing six pole magnet as claimed in claim 1, it is characterized in that: the described permanent magnet as main field excitation (11,12,13,14) is arranged on pole core inside, and the other parts in pole core except permanent magnet are soft magnetic material; The described excitation wire bag as auxiliary magnetic field excitation (7,8,9,10) is arranged on the outside of pole core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520151412.5U CN204518207U (en) | 2015-03-17 | 2015-03-17 | A kind of permanent magnetism line homogenizing six pole magnet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520151412.5U CN204518207U (en) | 2015-03-17 | 2015-03-17 | A kind of permanent magnetism line homogenizing six pole magnet |
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| Publication Number | Publication Date |
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| CN204518207U true CN204518207U (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520151412.5U Withdrawn - After Issue CN204518207U (en) | 2015-03-17 | 2015-03-17 | A kind of permanent magnetism line homogenizing six pole magnet |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104703378A (en) * | 2015-03-17 | 2015-06-10 | 中国原子能科学研究院 | Homogenized sextupole magnet of permanent magnet beam |
-
2015
- 2015-03-17 CN CN201520151412.5U patent/CN204518207U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104703378A (en) * | 2015-03-17 | 2015-06-10 | 中国原子能科学研究院 | Homogenized sextupole magnet of permanent magnet beam |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150729 Effective date of abandoning: 20170329 |
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| AV01 | Patent right actively abandoned |