CN87216407U - Magnetic shield device made from high temperature super conductor function - Google Patents
Magnetic shield device made from high temperature super conductor function Download PDFInfo
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- CN87216407U CN87216407U CN 87216407 CN87216407U CN87216407U CN 87216407 U CN87216407 U CN 87216407U CN 87216407 CN87216407 CN 87216407 CN 87216407 U CN87216407 U CN 87216407U CN 87216407 U CN87216407 U CN 87216407U
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- tube
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Abstract
The utility model discloses a magnetic shield device for high temperature super conductor, belonging to superconducting technical field, which adopts a double concentric cylinder device made from superconductive material and permeability magnetic material. During operation, the utility model is placed in liquid nitrogen. The utility model has the advantages of low cost and high precision. The magnetic shield device for high temperature super conductor is a necessary device for high Tc oxide superconductive magnetometer system.
Description
The utility model belongs to the superconductor technology field, and it can provide high-precision no magnetic space.
Before the utility model, used superconducting magnetic shielding device adopts the individual layer garden tube of conventional superconductors such as Pb, Nb usually, must place during work among the liquid helium, makes an interior space magnetic induction density B be bordering on zero.(referring to document: the specification of 330 magnetometer systems, U.S. S.H.E company) old device use liquid helium, the expense height, and domestic use is also inconvenient.
At the beginning of 87, the contour Tc oxide superconducting materials of the Ba-Y-Cu-O of appearance series, its thing presents the quadrature distortion perovskite structure mutually, (referring to document: (1) " Science Bulletin " Vol.32, No.6(1987) 412; (2) " Chinese Physics Letters " No.10(1987) 423) might replace conventional superconductor such as Pb, Nb and make the high-temperature superconductor magnetic shielding device.
The utility model purpose is to propose concentric bitubular magnet shielding structure, realizes with high Tc superconducting material, and it is expensive and use defective such as inconvenience to have overcome the prior art liquid helium, and provides essential condition for the SQUID magnetometer and the frequency mixer of development high Tc superconducting material.
Fig. 1: high-temperature superconductor magnetic shielding device cutaway view
Fig. 2: the Magnetic Shielding Effectiveness figure of practical magnetic shielding device
In conjunction with Fig. 1 invention main points of the present utility model are described. Fig. 1 is utility unit of the present utility model. This device is made of inside and outside concentric tube (1) (2). Inner core (1) adopts the superconductor preparation, and for example Ba-Y-Cu-O plays the main shield effect; The permeability magnetic material preparation is adopted on urceolus (2) and tube top (3), and for example pure iron works to improve magnetic field shielding effect and protection inner core (1) superconductor. Barrel is thick, the tube spacing is decided as required, but inner core (1) internal diameter is as the criterion with the testing sample of packing into. Fill common plastic film and the general scraps of paper between barrel, with protection and fixing inner core. Tall and big in barrel dliameter more than five times when tube, inner core can be bottomless, also can obtain high-precision no magnetic space in the central authorities of tube. Tube top (3) is played and is fixed and the effect that is connected inner/outer tube (1) (2) and specimen holder. During work, this device places liquid nitrogen, and testing sample is placed on a central part.
One of this device characteristic: the same with the magnetic shielding devices such as Nb, Pb of routine, make 400 milligauss earth magnetic fields in the magnetic screen cavity reduce by 7 orders of magnitude, eliminated the interference that earth magnetic field and environmental magnetic field are measured weak magnetic signal, the accurate magnetic that can't carry out is measured can be to realize; Two of this device characteristic: adopt double-deck concentric tube to improve Magnetic Shielding Effectiveness.With monotubular maskable external magnetic field 5 Gausses, and adopt this device, maskable external magnetic field 150 Gausses; Three of this device characteristic: work in liquid nitrogen temperature, cost is low, and is easy to use; Four of this device characteristic: for the SQUID magnetometer of developing high Tc superconducting material provides essential condition.
Embodiment is used for the superconducting magnetic shielding device of high Tc oxide superconducting magnetometer
See Fig. 1
Making internal diameter with the Ba-Y-Cu-O superconductor is 18mm, and external diameter is 24mm, and height is the interior garden tube (1) of 100mm.Making internal diameter with pure iron is 28mm, and external diameter is 36mm, and height is the urceolus (2) of 135mm.The pure iron preparation is adopted on tube top (3).Inner/outer tube (1) (2).Between the general plastic sheet of filling the garden tube, inner core top and the bottom filling plastic sheet that constitute.This device is put into the Dewar bottle that liquid nitrogen is housed and can be used.
Fig. 2 is the Magnetic Shielding Effectiveness figure of this device, expression tube internal magnetic field and external magnetic field relation.Ordinate G represents magnetic field intensity, and abscissa A represents impressed current.Curve (1) is at room temperature (300K), and during no magnetic shielding device, impressed current A and magnetic field intensity G are linear.Curve (2) is at liquid nitrogen temperature (77K), because the magnetic screening effect of this device, impressed current is to 4.2 ampere-hours, and internal magnetic field intensity equals zero.When impressed current greater than 4.2 ampere-hours (being that externally-applied magnetic field is greater than 150 Gausses), internal magnetic field intensity begins non-vanishing, increases gradually, loses shield effectiveness.
Claims (2)
1, a kind of superconducting magnetic shielding device, be made up of tube, it is characterized in that work places inside and outside concentric tube (1) (2) and tube top (3) among the liquid nitrogen to form, the top at tube is covered on tube top (3), inner core (1) is by the superconductor preparation, and urceolus (2) and tube top (3) are prepared by permeability magnetic material.
2, device according to claim 1 is characterized in that inner core (1) by the preparation of Ba-Y-Cu-O superconductor, and urceolus (2) and tube top (3) are prepared by the permeability magnetic material pure iron.The filling common plastics or the general scraps of paper between the inner/outer tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87216407 CN87216407U (en) | 1987-12-21 | 1987-12-21 | Magnetic shield device made from high temperature super conductor function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87216407 CN87216407U (en) | 1987-12-21 | 1987-12-21 | Magnetic shield device made from high temperature super conductor function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87216407U true CN87216407U (en) | 1988-08-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87216407 Withdrawn CN87216407U (en) | 1987-12-21 | 1987-12-21 | Magnetic shield device made from high temperature super conductor function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87216407U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288999A (en) * | 2011-08-16 | 2011-12-21 | 中国地质科学院地球物理地球化学勘查研究所 | High-temperature superconductivity weak magnetic measuring transducer |
| CN104614440A (en) * | 2015-02-10 | 2015-05-13 | 重庆交通大学 | Reinforced concrete bridge structural internal reinforcing bar corrosion monitoring device and reinforced concrete bridge structural internal reinforcing bar corrosion monitoring method |
| CN104634860A (en) * | 2015-02-10 | 2015-05-20 | 重庆交通大学 | Device and method for monitoring steel bar yield state in reinforced concrete bridge structure |
| CN104634865A (en) * | 2015-02-10 | 2015-05-20 | 重庆交通大学 | Detection device and method for positioning rusty part of steel bridge deck |
| CN104640426A (en) * | 2014-12-03 | 2015-05-20 | 北京原力辰超导技术有限公司 | Magnetic shielding device |
| CN105823913A (en) * | 2015-01-09 | 2016-08-03 | 中国科学院上海微系统与信息技术研究所 | Portable electromagnetic shielding barrel for Dewar |
| CN108811479A (en) * | 2018-06-25 | 2018-11-13 | 扬州安顺电气有限公司 | The split type rectangular shielding case of one kind and its manufacturing method |
-
1987
- 1987-12-21 CN CN 87216407 patent/CN87216407U/en not_active Withdrawn
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288999A (en) * | 2011-08-16 | 2011-12-21 | 中国地质科学院地球物理地球化学勘查研究所 | High-temperature superconductivity weak magnetic measuring transducer |
| CN102288999B (en) * | 2011-08-16 | 2013-05-15 | 中国地质科学院地球物理地球化学勘查研究所 | High-temperature superconductivity weak magnetic measuring transducer |
| CN104640426A (en) * | 2014-12-03 | 2015-05-20 | 北京原力辰超导技术有限公司 | Magnetic shielding device |
| CN105823913A (en) * | 2015-01-09 | 2016-08-03 | 中国科学院上海微系统与信息技术研究所 | Portable electromagnetic shielding barrel for Dewar |
| CN104614440A (en) * | 2015-02-10 | 2015-05-13 | 重庆交通大学 | Reinforced concrete bridge structural internal reinforcing bar corrosion monitoring device and reinforced concrete bridge structural internal reinforcing bar corrosion monitoring method |
| CN104634860A (en) * | 2015-02-10 | 2015-05-20 | 重庆交通大学 | Device and method for monitoring steel bar yield state in reinforced concrete bridge structure |
| CN104634865A (en) * | 2015-02-10 | 2015-05-20 | 重庆交通大学 | Detection device and method for positioning rusty part of steel bridge deck |
| CN104614440B (en) * | 2015-02-10 | 2017-08-04 | 重庆交通大学 | Reinforced steel bar erosion monitoring device and method inside concrete bridge construction |
| CN104634865B (en) * | 2015-02-10 | 2017-08-11 | 重庆交通大学 | Steel Bridge Deck corrosion spots localization detection means and method |
| CN104634860B (en) * | 2015-02-10 | 2017-10-03 | 重庆交通大学 | Reinforcement yielding state monitoring apparatus and method inside concrete bridge construction |
| CN108811479A (en) * | 2018-06-25 | 2018-11-13 | 扬州安顺电气有限公司 | The split type rectangular shielding case of one kind and its manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |