EP2238602A1 - Method and device for producing a magnetic field which can be freely oriented spatially using superconducting permanent magnets - Google Patents
Method and device for producing a magnetic field which can be freely oriented spatially using superconducting permanent magnetsInfo
- Publication number
- EP2238602A1 EP2238602A1 EP09707077A EP09707077A EP2238602A1 EP 2238602 A1 EP2238602 A1 EP 2238602A1 EP 09707077 A EP09707077 A EP 09707077A EP 09707077 A EP09707077 A EP 09707077A EP 2238602 A1 EP2238602 A1 EP 2238602A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- permanent magnet
- superconducting
- magnetic field
- superconducting permanent
- space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F13/00—Apparatus or processes for magnetising or demagnetising
- H01F13/003—Methods and devices for magnetising permanent magnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/20—Electromagnets; Actuators including electromagnets without armatures
- H01F7/202—Electromagnets for high magnetic field strength
Definitions
- the invention relates to the fields of materials science and physics and relates to a method and apparatus for generating a spatially freely orientable magnetic field by means of superconducting permanent magnets, as used for example in the production of thin layers. Furthermore, spectroscopic investigation methods, in which the magnetic field comes into play as an influencing variable, should be mentioned as an application.
- magnetic fields are often an important process parameter. Especially when they are freely adjustable in their strength and orientation to the sample, ie without changing other process variables, new scientific and economic possibilities often arise. Particularly interesting is the use of magnetic flux densities, which are well above values of about 2 T-cw, which were previously accessible with electric or permanent magnets. For example, in the production of thin layers in sputtering or MBE systems or in the analysis of materials by means of spectroscopy or diffractometry, such flux densities are used today (S. Summers et al .: J. Phys. D: Appl. Phys.
- Air coils are the simplest form of electromagnet. Without significant cooling, cw flux densities of approximately 0.2 T-cw can be generated with this design. In more complex constructions, such as Solenoid coils with soft iron return frames allow larger fields up to saturation magnetization of approximately 2 T-cw. In any case, the area of maximum flux density is found inside the coil or in a narrow air gap of a yoke. This results in considerable restrictions in the spatial orientation of the field and the sample space accessibility. An optical access is possible here preferably in the coil axis. SpNt coils with radial insight are limited in their viewing angle and thus do not allow independent change of the magnetic field orientation
- the object of the present invention is to provide a method and a device for generating a freely orientable magnetic field by means of superconducting permanent magnets in a sample space, through which a freely in space orientable magnetic field at the desired location and in the desired magnetic flux direction and with a flux density up to 15 T is generated and maintained.
- the inventive device for generating a freely orientable magnetic field by means of superconducting permanent magnets consists of a space in which at least one superconducting permanent magnet, at least one cooling device for the superconducting permanent magnet, at least one device for magnetizing the superconducting permanent magnet, at least one device for three-axis translation and triaxial Rotation of the superconducting permanent magnet in space and at least one movable in freely orientable magnetic field sample are.
- the material of the superconductive permanent magnet is a high-temperature superconducting material.
- the high temperature superconducting material YBa 2 is Cu 3 O 7 (YBCO).
- the space is the working space of a manipulator.
- the cooling device is a cryostat and even more advantageously the cooling in the cryostat is realized by means of liquid helium or nitrogen.
- the device for magnetizing the superconducting permanent magnet a coil and even more advantageously, if .A coil with a field strength in the range of OT to 15 T and more is present.
- the device for three-axis translation and three-axis rotation of the superconducting permanent magnet is a manipulator device.
- At least one superconducting permanent magnet connected to a cooling device is exposed to a magnetic field in at least one device for magnetizing the superconducting permanent magnet, while the superconducting permanent magnet is exposed below by means of the cooling device cooled to its critical temperature and maintained at a temperature below the critical temperature, and then removed from the device for magnetization and transported by means of the device for triaxial translation and triaxial rotation to a location in space, of which the now permanent magnetic field passing through the device for three-axis translation and three-axis rotation of the superconducting permanent magnet is freely orientable in space, with the desired magnetic flux direction and a magnetic flux density up to 15 T acting on the sample.
- the working space of a manipulator is used as the working space.
- a high-temperature superconducting permanent magnet is used as the superconducting permanent magnet, wherein advantageously a superconducting permanent magnet made of YBCO is used.
- a coil is used as the magnetizing device for the superconducting permanent magnet.
- magnetic flux densities in the range of 0 T to 15 T are used.
- the solution according to the invention makes it possible for the first time to allow a magnetic field to act on a sample which is freely orientable in a working space in six degrees of freedom (three translation, three rotations) and at the same time permanently in the desired magnetic flux direction and with a magnetic flux density of up to 15 T can be generated and maintained for a desired time.
- the inventive separation of the magnetization and cooling under transition temperature of the permanent magnet of the sample processing / - investigation a free orientation of the magnetic field in the working space only possible.
- the superconducting permanent magnet by means of the device for three-axis translation and three-axis rotation only in the magnetization device, advantageously a coil, which is also located in the working space or is coupled to this, positioned.
- the magnetization device can be located at a location not required for the sample processing / examination in the working space, so that it does not hinder the free mobility of superconducting permanent magnet and sample.
- the superconducting permanent magnet can now be transported by means of the device for triaxial translation and triaxial rotation to a location in the working space in which it assumes the position to the sample that is desired.
- the permanent magnetic field before and / or during the Sample processing / examination is oriented relative to the sample (the position / position and orientation of the permanent magnetic field result from the sum of the three freely selectable spatial directions and an additional three freely selectable angles).
- an identical or spatially changing magnetic flux direction and magnetic flux density can act on the sample.
- the inventive method only works if the temperature of the superconducting permanent magnet is kept below the transition temperature during the sample processing / -Schsuchung.
- the superconducting permanent magnet is cooled accordingly throughout the processing.
- This can be realized, for example, with a cryostat which is positively, positively and / or materially connected to the superconducting permanent magnet.
- a cryostat can be cooled, for example, by means of liquid helium, nitrogen and other cryogenic liquids.
- the working space of a known cryo-manipulator for angle-resolved photon emission spectroscopy can be used as a usable working space.
- the therefore known manipulators which can be used as a device for the three-axis translation and three-axis rotation of the superconducting permanent magnet, the quasi-goniomethsche rotation of the superconducting permanent magnet can be realized around all three spatial axes.
- the system is compact and meets all the requirements of vacuum technology and magnetism. The invention will be explained in more detail using an exemplary embodiment.
- a cuboid body with edge lengths of 8x8x10mm of YBa 2 Cu 3 ⁇ 7 (YBCO) as solid HT superconductor was mounted on the sample holder of a cryo manipulator and equipped with a temperature measuring diode and a Hall sensor for magnetic field measurement.
- the cryomanipulator was lowered into a tube and sealed by means of flanges vacuum-tight and subsequently evacuated.
- This tube with the cryomanipulator and the YBCO cuboid was positioned in a helium-cooled superconducting coil such that the YBCO cuboid was located in the center of the coil.
- the superconductor coil has a maximum field strength of 9 T.
- the superconductor coil was set to a field strength of 6 T, the temperature of the YBCO cuboid having the ambient temperature. Thereafter, the YBCO ingot in the sample holder of the cryomanipulator was cooled by means of liquid helium to a temperature of 48 K, that is, below the critical temperature of the YBa 2 Cu 3 ⁇ 7 -Mathals.
- the field strength of the superconducting coil was changed from 6T to 0T. During this time the temperature level of the YBCO cuboid was kept at 48K.
- a magnetic field strength of the YBCO cuboid of 2.8 T could be measured. This value is essentially determined by the quality (quality, size, orientation, thermal contact) of the YBCO material and can be further enhanced by optimization.
- the YBCO cuboid was moved by means of the cryomanipulator in the still reachable by the tube degrees of freedom.
- the magnetic field strength was measured by means of the resonant Hall sensor. It remained at a constant value of 2.8 T throughout the experiment and only weakened after stopping the He cooling and eventually returned to 0 T on further warming.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810000221 DE102008000221A1 (en) | 2008-02-01 | 2008-02-01 | Method and device for generating a spatially freely orientable magnetic field by means of superconducting permanent magnets |
PCT/EP2009/050301 WO2009095298A1 (en) | 2008-02-01 | 2009-01-13 | Method and device for producing a magnetic field which can be freely oriented spatially using superconducting permanent magnets |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2238602A1 true EP2238602A1 (en) | 2010-10-13 |
Family
ID=40677470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09707077A Withdrawn EP2238602A1 (en) | 2008-02-01 | 2009-01-13 | Method and device for producing a magnetic field which can be freely oriented spatially using superconducting permanent magnets |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2238602A1 (en) |
DE (1) | DE102008000221A1 (en) |
WO (1) | WO2009095298A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3290187B1 (en) * | 2016-08-29 | 2020-04-15 | Airbus Operations GmbH | 3d printer with hovering printing head or printing bed |
DE102020122176A1 (en) | 2020-08-25 | 2022-03-03 | Carl Zeiss Ag | Magnetic field device and microscope |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0217038A (en) * | 1988-07-06 | 1990-01-22 | Toshiba Corp | Magnetic resonance imaging apparatus |
DE19615514A1 (en) * | 1996-04-19 | 1997-10-23 | Bruker Analytische Messtechnik | Charging a superconducting solenoid |
JPH11248810A (en) * | 1998-02-27 | 1999-09-17 | Rikagaku Kenkyusho | Nuclear magnetic resonance apparatus |
US6330467B1 (en) * | 1999-02-04 | 2001-12-11 | Stereotaxis, Inc. | Efficient magnet system for magnetically-assisted surgery |
JP2004349276A (en) * | 2003-04-25 | 2004-12-09 | Japan Science & Technology Agency | Superconducting permanent magnet unit |
JP5020533B2 (en) * | 2006-04-27 | 2012-09-05 | 株式会社日立メディコ | Drug delivery system and computer program for controlling the same |
-
2008
- 2008-02-01 DE DE200810000221 patent/DE102008000221A1/en not_active Ceased
-
2009
- 2009-01-13 EP EP09707077A patent/EP2238602A1/en not_active Withdrawn
- 2009-01-13 WO PCT/EP2009/050301 patent/WO2009095298A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2009095298A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102008000221A1 (en) | 2009-08-13 |
WO2009095298A1 (en) | 2009-08-06 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20100825 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR |
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AX | Request for extension of the european patent |
Extension state: AL BA RS |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HORST, ALEXANDER Inventor name: BUECHNER, BERND Inventor name: LINDACKERS, DIRK |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20150811 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20160802 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: LEIBNIZ-INSTITUT FUER FESTKOERPER- UND WERKSTOFFFO |