CN1127094C - Enlosed undulator and use thereof - Google Patents
Enlosed undulator and use thereof Download PDFInfo
- Publication number
- CN1127094C CN1127094C CN 98116819 CN98116819A CN1127094C CN 1127094 C CN1127094 C CN 1127094C CN 98116819 CN98116819 CN 98116819 CN 98116819 A CN98116819 A CN 98116819A CN 1127094 C CN1127094 C CN 1127094C
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- undulator
- permanent magnets
- magnetic
- permanent magnet
- magnet group
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Abstract
The present invention provides a closed type undulator which is composed of a paired movable permanent magnet group and a paired fixed permanent magnet group which are formed by small magnetic blocks and pole heads and yokes which are arranged on the magnet groups. The small magnetic blocks of the movable permanent magnet group and the fixed permanent magnet group pass through the pole heads and a closed magnetic circuit of a work area to form a magnetic field of the work area, and thus, the closure of a magnetic loop of the undulator is realized. The present invention is used for reforming the traditional undulator. The present invention realizes the closure of the magnetic loop, reduces the interference of the magnetic field of work area against environment, widens the radiation spectrum of the undulator and reduces the cost of the undulator, and performance indexes, such as radiant brightness, flux, etc., are easy to optimize. The present invention uses a mode of the movable permanent magnet group and the fixed permanent magnet group to make the undulator have 'switch' performance, and thus, the undulator has the advantages of simple and easy installation, debugging and operation.
Description
Technical field
The present invention relates to the undulator technical field.
Background technology
Undulator is one of core component of widespread use on synchronous radiation accelerator and the free-electron laser device.Domestic and international used undulator is tradition " style of opening " undulator at present, the magnetic loop of this undulator is close to open to the outside world, the permanent magnet working point is low, the generation magnetic flux is few, have quite a few magnetic flux to leak in the undulator nonclient area again, though cause this class undulator to adopt expensive permanent magnet material, performance is bad, the highest of cartridge magnetic field reaches 1/2nd of material saturation point, and surrounding environment is caused magnetic interference.In addition, this class undulator cost is expensive unusually.
Summary of the invention
The object of the present invention is to provide a kind of high-performance, " closo " undulator of low cost.
The present invention realizes in the following ways.
The paired moving set of permanent magnets that the present invention is made of little magnetic patch, paired decide set of permanent magnets, be installed in that adjustable cartridge, yoke on the magnet group is lost, mobile base and do not have the magnetic I-beam and form.Moving set of permanent magnets is lost with yoke respectively and is linked to each other, and is fixed on mobile base with clip.Mobile base is placed in the groove of no magnetic I-beam.Decide in the groove that set of permanent magnets is fixed on no magnetic I-beam, between moving set of permanent magnets.Adjustable cartridge is installed in respectively to be decided on the set of permanent magnets.Wherein do not have the support component that the magnetic I-beam is this undulator, mobile base is the critical piece that set of permanent magnets is moved.Working area field by moving, as decide set of permanent magnets little magnetic patch through yoke be lost, adjustable cartridge and workspace closed magnetic circuit form realization undulator magnetic loop closure.It can be used for the transformation of traditional undulator, and whole set of permanent magnets are arranged to decide set of permanent magnets, is individually fixed in the magnetic gap regulating system of traditional undulator, improves the performance of undulator.
Adjustable cartridge of the present invention can stretch into vacuum chamber.The present invention also can only be provided with moving set of permanent magnets, can realize having a snack of working area field by changing cartridge shape and structure.The X of vertical line Z, the work magnetic field of Y both direction are in conjunction with forming " circular polarisation " undulator.
The present invention has realized the closure of magnetic loop; Realize having a snack of working area field by changing cartridge shape and structure, the radiant light that has reduced by first and second integration, multipole magnetic field and each periodic field and the ideal field of working area field differs, thereby reduce its interference to line, and optimized the first-harmonic of undulator radiation spectrum and harmonic wave, brightness and performance index such as well-illuminated: as widened the spectrum of existing light source, improve light-source brightness; Reduced the cost of undulator.Adopt mode moving, that decide set of permanent magnets, make undulator have " switch " performance, thereby make the installation of undulator, debugging is simple and easy to do with operation.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further described.
Accompanying drawing 1, principle of the invention figure.Wherein, 1, the 7-yoke is lost, 2, the moving set of permanent magnets of 6-, 3,5-decides set of permanent magnets, the adjustable cartridge of 4-, the little magnetic patch of 8-has the little magnetic patch of being of arrow, the 9-vacuum chamber.
Accompanying drawing 2, one of structure of the present invention synoptic diagram, moving set of permanent magnets folder is decided the situation of set of permanent magnets.Wherein, 10,15-does not have the magnetic I-beam, 11-mobile base, 12-clip, 13-guide rail, 14-leading screw, 16-base.
Embodiment
Referring to accompanying drawing, moving, decide set of permanent magnets and constitute by little magnetic patch 8 respectively, arrowedly in the accompanying drawing 1 be little magnetic patch.Moving set of permanent magnets 2,6 is lost with yoke respectively and 1,7 is linked to each other, and is fixed on the mobile base 11 with clip 12.Mobile base 11 is placed in the groove of no magnetic I-beam 10.Decide set of permanent magnets 3,5 and be fixed in the groove of no magnetic I-beam 15, between moving set of permanent magnets 2,6.Adjustable cartridge 4 is installed in respectively to be decided on the set of permanent magnets 3,5.Working area field of the present invention is formed through little magnetic patch, cartridge, the workspace closed magnetic circuit of moving set of permanent magnets by the little magnetic patch of deciding set of permanent magnets.The direction of arrow is little magnetic patch direction of magnetization.Z is to being beam direction.Install when of the present invention, adjustable cartridge 4 can stretch into vacuum chamber 9, forms " magnetic vacuum chamber ".
During work, utilize driven by motor mobile base 11, set of permanent magnets 2,6 is moved.When moving set of permanent magnets when the Z direction moves, magnetic potential is subtracted each other, and produces required work magnetic field.When 1/4 magnetic cycle phase of moving during length, the undulator workspace produces zero magnetic field, thereby realizes the switch performance of " closo " undulator.When moving set of permanent magnets when opposite direction is retracted, the magnetic potential mutual superposition of set of permanent magnets 2,3,5,6 produces the strongest peak field in the undulator workspace.The also available same principle in the magnetic field of vertical line Z other direction produces.The X of vertical line Z, the magnetic field of Y both direction are in conjunction with forming " circular polarisation " undulator.
According to the erecting stage situation, can set of permanent magnets 2,6 is fixing, become and decide set of permanent magnets; Set of permanent magnets 3,5 is separately fixed on the mobile base, becomes moving set of permanent magnets.Also can set of permanent magnets 2,3 is fixing, become and decide set of permanent magnets; Set of permanent magnets 5,6 is separately fixed on the mobile base, becomes moving set of permanent magnets.Or set of permanent magnets 5,6 is fixed as decides set of permanent magnets, set of permanent magnets 2,3 is fixed on the mobile base, becomes moving set of permanent magnets.Move moving set of permanent magnets 2,3 it is moved+/ one two/one-period along line district direction, regulate required working area field.
The present invention can only be provided with moving set of permanent magnets 2,6.Move moving set of permanent magnets, the magnetic field that produces in the undulator workspace can vary continuously to negative peak-peak magnetic field from peak-peak magnetic field through zero magnetic field.
The present invention also can be used for the transformation of traditional undulator, to improve its performance.As shown in Figure 1, tie-down yoke is lost 1, set of permanent magnets 2,3 is in the top of traditional undulator gap adjustment system, and fixed permanent magnet group 5,6 yokes are lost 7 in its underpart, transform gap between upper and lower cartridge, i.e. scalable work magnetic field.Be particularly useful for putting into operation the transformation of undulator of this method is to improve its performance.
Claims (4)
1. " closo " undulator, it comprises the paired moving set of permanent magnets [2,6] that is made of little magnetic patch, paired decide set of permanent magnets [3,5] and be installed in adjustable cartridge [4] on the magnet group, it is characterized in that it comprises also that yoke is lost [1,7], mobile base [11] and no magnetic I-beam, moving set of permanent magnets [2,6] be lost with yoke respectively [1,7] link to each other, and be fixed on mobile base [11] with clip [12]; Mobile base [11] is placed in the groove of no magnetic I-beam [10]; Decide set of permanent magnets [3,5] and be fixed in the groove of no magnetic I-beam [15], be positioned between the moving set of permanent magnets [2,6]; Adjustable cartridge [4] is installed in respectively decides set of permanent magnets [3,5]; Wherein do not have the support component that the magnetic I-beam is this undulator, mobile base is the critical piece that set of permanent magnets [2,6] is moved; Working area field by moving, as decide set of permanent magnets little magnetic patch through yoke be lost, adjustable cartridge and workspace closed magnetic circuit form realization undulator magnetic loop closure.
2. undulator as claimed in claim 1 is characterized in that adjustable cartridge stretches into vacuum chamber [9].
3. undulator as claimed in claim 1 is characterized in that realizing having a snack of working area field by the shape and the structure that change adjustable cartridge [4].
4. as claim 1,2,3 described undulators, the work magnetic field of X, Y both direction that it is characterized in that vertical line Z is in conjunction with feasible one-tenth " circular polarisation " undulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98116819 CN1127094C (en) | 1998-07-24 | 1998-07-24 | Enlosed undulator and use thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98116819 CN1127094C (en) | 1998-07-24 | 1998-07-24 | Enlosed undulator and use thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1243321A CN1243321A (en) | 2000-02-02 |
| CN1127094C true CN1127094C (en) | 2003-11-05 |
Family
ID=5225224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98116819 Expired - Fee Related CN1127094C (en) | 1998-07-24 | 1998-07-24 | Enlosed undulator and use thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1127094C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956279A (en) * | 2012-10-25 | 2013-03-06 | 中国科学院上海应用物理研究所 | Undulator and manufacture method thereof |
| US20150090905A1 (en) * | 2013-09-27 | 2015-04-02 | Dmitri E. Nikonov | Micromagnet Based Extreme Ultra-Violet Radiation Source |
| CN104409129B (en) * | 2014-11-17 | 2017-02-22 | 中国科学院上海微系统与信息技术研究所 | Undulator |
| CN111081409A (en) * | 2019-12-10 | 2020-04-28 | 中国科学技术大学 | Longitudinal gradient undulator with adjustable polarization direction and terahertz light source adopting same |
-
1998
- 1998-07-24 CN CN 98116819 patent/CN1127094C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1243321A (en) | 2000-02-02 |
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