CN112946761A - Cryogenic system and superconducting quantum interference system - Google Patents
Cryogenic system and superconducting quantum interference system Download PDFInfo
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- CN112946761A CN112946761A CN202110145543.2A CN202110145543A CN112946761A CN 112946761 A CN112946761 A CN 112946761A CN 202110145543 A CN202110145543 A CN 202110145543A CN 112946761 A CN112946761 A CN 112946761A
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- dewar flask
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims description 19
- 238000009413 insulation Methods 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 11
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- 230000004044 response Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000001802 infusion Methods 0.000 description 4
- 239000011152 fibreglass Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
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- 229920006335 epoxy glue Polymers 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
Abstract
The invention provides a cryogenic system and a superconducting quantum interference system, wherein the cryogenic system comprises: a non-magnetic dewar comprising: the Dewar flask comprises a Dewar flask bottom and a Dewar flask body which is connected with the Dewar flask bottom and extends upwards, wherein the Dewar flask bottom and the Dewar flask body jointly enclose a flask inner space; the superconducting quantum interference device is arranged in the space in the bottle and is arranged at the bottom of the Dewar bottle; a low-temperature lead wire which is arranged in the space in the Dewar flask, one end of the low-temperature lead wire is connected with the lead terminal of the superconducting quantum interference device, and the low-temperature lead wire extends upwards along the inner wall of the Dewar flask body so that the other end of the low-temperature lead wire is connected with a lead wire interface, wherein the lead wire interface is arranged on the top end surface of the Dewar flask body; and the low-temperature insert is inserted and installed on the top end surface of the Dewar flask body. The low-temperature system and the superconducting quantum interference system provided by the invention solve the problem that the superconducting quantum interference device in the existing low-temperature system is easily interfered by external vibration due to the cantilever structure, so that extra magnetic field noise response is generated.
Description
Technical Field
The invention relates to the field of superconducting magnetic detection, in particular to a cryogenic system and a superconducting quantum interference system.
Background
As a high-sensitivity magnetic sensor, the superconducting quantum interference device is widely applied to the measurement of weak magnetic fields, such as biomagnetism, geophysical, low-field nuclear magnetic resonance and the like.
The superconducting quantum interference system generally comprises a low-temperature system and a room-temperature system, wherein the low-temperature system consists of a non-magnetic Dewar, a superconducting quantum interference device, a low-temperature lead and a low-temperature insert, and the room-temperature system is matched with the low-temperature system to complete signal reading, acquisition and processing. In cryogenic systems, one common practice is: the superconducting quantum interference device and the low-temperature lead are fixedly arranged below the low-temperature insert through a cantilever structure, and then the superconducting quantum interference device and the low-temperature lead are integrally inserted into the nonmagnetic Dewar, so that the installation and measurement are realized; the method has the advantages of visual operation and convenient installation, but in the using process, the superconducting quantum interference device is easily interfered by external vibration due to the cantilever structure, so that extra magnetic field noise response is generated, and great interference is brought to actual measurement.
Therefore, how to design the cryogenic system better is an important issue facing the application of superconducting quantum interference devices, especially in the noisy vibration environment.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a cryogenic system and a superconducting quantum interference system, which are used to solve the problem that the superconducting quantum interference device in the cryogenic system is very susceptible to external vibration interference due to the cantilever structure, thereby generating extra magnetic field noise response.
To achieve the above and other related objects, the present invention provides a cryogenic system comprising:
a non-magnetic dewar comprising: the Dewar flask comprises a Dewar flask bottom and a Dewar flask body which is connected with the Dewar flask bottom and extends upwards, wherein the Dewar flask bottom and the Dewar flask body jointly enclose a flask inner space;
the superconducting quantum interference device is arranged in the space in the bottle and is arranged at the bottom of the Dewar bottle;
a low-temperature lead wire which is arranged in the bottle inner space, one end of the low-temperature lead wire is connected with the lead terminal of the superconducting quantum interference device, and the low-temperature lead wire extends upwards along the inner wall of the Dewar bottle body so that the other end of the low-temperature lead wire is connected with a lead wire interface, wherein the lead wire interface is arranged on the top end surface of the Dewar bottle body;
and the low-temperature insert is inserted and installed on the top end surface of the Dewar flask body.
Optionally, the superconducting quantum interference device is mounted at the bottom of the dewar based on a carrier plate; the superconducting quantum interference device is arranged on the carrier plate through a connecting component, and the carrier plate is arranged at the bottom of the Dewar flask through a connecting mechanism.
Optionally, the connecting member comprises a screw; at this time, a device threaded hole adapted to the screw is formed in the superconducting quantum interference device, and a device-carrier plate threaded hole adapted to the screw is formed in a position corresponding to the carrier plate.
Optionally, the connection mechanism comprises a screw; at the moment, a bottle bottom threaded hole matched with the screw is formed in the bottom of the Dewar flask, a bottle bottom-carrier plate threaded hole matched with the screw is formed in the position corresponding to the carrier plate, and the distance between the bottle bottom-carrier plate threaded hole and the edge of the carrier plate is smaller than the distance between the device-carrier plate threaded hole and the edge of the carrier plate.
Optionally, the connection mechanism comprises: the nut and the threaded column are arranged at the bottom of the Dewar flask and are matched with the nut; at this time, a mounting hole is arranged at a position corresponding to the carrier plate, wherein the distance between the mounting hole and the edge of the carrier plate is smaller than the distance between the device-carrier plate threaded hole and the edge of the carrier plate.
Optionally, the carrier plate is further provided with a connecting threaded hole, wherein a distance between the connecting threaded hole and the edge of the carrier plate is smaller than a distance between the device-carrier plate threaded hole and the edge of the carrier plate.
Optionally, the cryogenic insert comprises: the device comprises a mounting top plate mounted on the top end face of the Dewar flask body, a layered heat insulation plate inserted into the space in the flask, and a liquid conveying pipe penetrating through the mounting top plate and the layered heat insulation plate; the mounting top plate is provided with a lead interface mounting opening, a liquid inlet of the liquid conveying pipe is bonded to the upper surface of the mounting top plate, and a liquid outlet of the liquid conveying pipe is bonded to the lower surface of the layered heat insulation plate.
Optionally, the cryogenic insert further comprises: and the heat insulation gap is arranged between the mounting top plate and the layered heat insulation plate.
The present invention also provides a superconducting quantum interference system, comprising: the cryogenic system of any one of the above.
As described above, according to the cryogenic system and the superconducting quantum interference system of the present invention, the superconducting quantum interference device is installed at the bottom of the nonmagnetic dewar, and the low temperature lead wire placed on the inner wall of the nonmagnetic dewar and the lead wire interface placed at the top end of the nonmagnetic dewar are used to lead out the electrical signal, so that the superconducting quantum interference device and the low temperature insert member are integrally separated, and thus the vibration interference caused by the cantilever structure is eliminated; meanwhile, the low-temperature insert only has a single low-temperature heat insulation function, so that the low-temperature insert can be manufactured into a standard module.
Drawings
Fig. 1 is a schematic structural diagram of a cryogenic system according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a superconducting quantum interference system according to a second embodiment of the present invention.
Description of the element reference numerals
10 superconducting quantum interference system
100 cryogenic system
101 nonmagnetic Dewar
1011 Dewar flask bottom
1012 Dewar bottle body
1013 space in bottle
102 superconducting quantum interference device
103 low temperature lead wire
104 lead interface
105 low temperature insert
1051 mounting top plate
1052 laminated heat insulation board
1053 infusion tube
1054 Heat insulation gap
106 carrier plate
107 connecting mechanism
200 normal temperature system
201 readout module
202 data acquisition and processing module
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1 and fig. 2. It should be noted that the drawings provided in the present embodiment are only schematic and illustrate the basic idea of the present invention, and although the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation, the form, quantity and proportion of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
Example one
As shown in fig. 1, the present embodiment provides a cryogenic system, where the cryogenic system 100 includes:
a non-magnetic dewar 101, the non-magnetic dewar 101 comprising: the Dewar flask comprises a Dewar flask bottom 1011 and a Dewar flask body 1012 which is connected with the Dewar flask bottom 1011 and extends upwards, wherein the Dewar flask bottom 1011 and the Dewar flask body 1012 together enclose an in-flask space 1013;
a superconducting quantum interference device 102 disposed in the bottle interior space 1013 and mounted to the dewar bottom 1011;
a low-temperature lead 103 disposed in the bottle interior 1013, having one end connected to the lead terminal of the superconducting quantum interference device 102, and extending upward along the inner wall of the dewar body 1012 to have the other end connected to a lead interface 104, wherein the lead interface 104 is mounted on the top end surface of the dewar body 1012;
and a low temperature insert 105 inserted and mounted on the top end surface of the dewar body 1012.
For example, the nonmagnetic dewar 101 is made of glass fiber reinforced plastic and is used for containing cryogenic liquid, such as cryogenic liquid helium or cryogenic liquid nitrogen.
As an example, the superconducting quantum interference device 102 may be a single superconducting device, or may be an array structure composed of a plurality of superconducting devices; in practice, the superconducting quantum interference device 102 is generally an array structure composed of a plurality of superconducting devices.
As an example, as shown in fig. 1, the superconducting quantum interference device 102 is mounted on the dewar bottom 1011 based on a carrier plate 106; the superconducting quantum interference device 102 is mounted on the carrier 106 through a connection component (not shown), and the carrier 106 is mounted on the dewar bottom 1011 through a connection mechanism 107. Optionally, the carrier 106 is preferably made of a material with good low temperature and mechanical properties, such as glass fiber reinforced plastic.
In particular, the connection means (not shown in the figures) comprise screws; at this time, a device threaded hole adapted to the screw is formed in the superconducting quantum interference device 102, and a device-carrier threaded hole adapted to the screw is formed in a position corresponding to the carrier 106. In this example, the mounting of the superconducting quantum interference device 102 on the carrier 106 is achieved by aligning device threaded holes with device-carrier threaded holes and by adapting the mounting of screws with the device threaded holes and the device-carrier threaded holes.
Specifically, in one example, the attachment mechanism 107 includes a screw; at this time, a bottle bottom threaded hole adapted to the screw is formed in the dewar bottle bottom 1011, and a bottle bottom-carrier plate threaded hole adapted to the screw is formed in a position corresponding to the carrier plate 106, wherein a distance between the bottle bottom-carrier plate threaded hole and the edge of the carrier plate is smaller than a distance between the device-carrier plate threaded hole and the edge of the carrier plate, so that the bottle bottom-carrier plate threaded hole is located in a non-mounting region of the superconducting quantum interference device 102 in the carrier plate 106, and the bottle bottom-carrier plate threaded hole is prevented from being blocked by the superconducting quantum interference device 102 mounted in the carrier plate 106, thereby affecting the use. In this example, mounting of the carrier plate 106 to the dewar bottom 1011 is achieved by aligning the bottom-carrier threaded holes with the bottom threaded holes and by fitting screws into the bottom-carrier threaded holes and bottom threaded holes. Optionally, the bottom threaded hole may be integrally formed with the nonmagnetic dewar, or may be formed by aligning and bonding epoxy glue at a later stage.
Specifically, in another example, the connection mechanism 107 includes: the nut and the threaded column are arranged at the bottom 1011 of the Dewar flask and are matched with the nut; at this time, a mounting hole is disposed at a position corresponding to the carrier plate 106, wherein a distance between the mounting hole and the edge of the carrier plate is smaller than a distance between the device-carrier plate threaded hole and the edge of the carrier plate, so that the mounting hole is located in a non-mounting region of the superconducting quantum interference device 102 in the carrier plate 106, and the mounting hole is prevented from being blocked by the superconducting quantum interference device 102 mounted in the carrier plate 106, thereby affecting use. In this example, the carrier plate 106 is mounted on the dewar bottom 1011 by fitting the mounting hole on the threaded post and by fitting the nut with the threaded post. It should be noted that, in practical applications, in order to facilitate the installation hole to be sleeved on the threaded column, the inner diameter of the installation hole may be slightly larger than the outer diameter of the threaded column. Optionally, the threaded post may be integrally formed with the nonmagnetic dewar, or may be formed later by epoxy glue aligned bonding.
Specifically, a connection threaded hole is further formed in the carrier plate 106, so that when the carrier plate 106 is installed, the carrier plate 106 is placed on the dewar bottom 1011 by using a connection rod adapted to the connection threaded hole; the distance between the connection threaded hole and the edge of the carrier plate is smaller than the distance between the device-carrier plate threaded hole and the edge of the carrier plate, so that the connection threaded hole is located in a non-mounting area of the superconducting quantum interference device 102 in the carrier plate 106, and the connection threaded hole is prevented from being shielded by the superconducting quantum interference device 102 mounted in the carrier plate 106, thereby affecting the use.
As an example, the low temperature lead 103 is a twisted copper pair enameled wire, the number of which is determined according to the number of superconducting devices and the number of lead terminals in each superconducting device, and the length of which is determined according to the height of the non-magnetic dewar 101 and the routing thereof in the non-magnetic dewar 101. It is noted that the cryogenic lead 103 is not directly secured to the inner wall of the dewar 1012, but rather is indirectly secured by a small gap between the outer wall of the cryogenic insert 105 and the inner wall of the dewar 1012.
As an example, the lead interface 104 is used for inserting a connection wire, and the connection wire is electrically connected to the low-temperature lead 103, so that the output electrical signal of the superconducting quantum interference device 102 is extracted. In practical applications, the number of the lead interfaces 104 can be set according to actual requirements, and the installation position of the lead interfaces on the top end surface of the dewar body 1012 is determined by the extraction position of the low temperature lead 103.
By way of example, as shown in fig. 1, the cryogenic insert 105 comprises: a top installation plate 1051 installed on the top end surface of the dewar body 1012, a layered heat insulating plate 1052 inserted into the bottle space 1013, and a liquid transfer tube 1053 passing through the top installation plate 1051 and the layered heat insulating plate 1052; a lead interface mounting opening (not shown) is formed in the mounting top plate 1051, a liquid inlet of the infusion tube 1053 is bonded to the upper surface of the mounting top plate 1051, and a liquid outlet of the infusion tube 1053 is bonded to the lower surface of the layered heat insulation plate 1052.
Specifically, the mounting top plate 1051 is mounted on the top end surface of the dewar body 1012 by screws; at this time, a top plate threaded hole adapted to the screw is formed in the mounting top plate 1051, and a top end surface threaded hole adapted to the screw is also formed in a position corresponding to the top end surface of the dewar body 1012. In this example, the insertion mounting of the cryogenic insert 105 to the top end face of the dewar body 1012 is achieved by aligning the top plate threaded hole with the top end face threaded hole and by fitting screws with the top plate threaded hole and the top end face threaded hole. Optionally, the material of the installation top plate 1051 is glass fiber reinforced plastic.
Specifically, the layered heat insulation board 1052 is made of heat insulation foam, but other materials with excellent heat insulation effects are also suitable for manufacturing the layered heat insulation board 1052.
Specifically, the infusion tube 1053 is used for inputting cryogenic liquid, such as cryogenic liquid helium or cryogenic liquid nitrogen, into the nonmagnetic dewar 101.
Specifically, as shown in fig. 1, the low temperature insert 105 further includes: an insulating gap 1054 between the top mounting plate 1051 and the layered insulating panel 1052 to further improve the low temperature insulating properties of the low temperature insert 105. In practice, the insulating gap 1054 is a vacuum insulating gap.
Referring to fig. 1, the installation process of the cryogenic system 100 according to the present embodiment will be described in detail.
1) Providing a superconducting quantum interference device 102 to be installed, a low-temperature lead 103 and a lead interface 104, welding one end of the low-temperature lead 103 to a lead terminal of the superconducting quantum interference device 102, and welding the other end of the low-temperature lead 103 to the lead interface 104;
2) providing a carrier board 106, and mounting the superconducting quantum interference device 102 in 1) on the carrier board 106 through a connecting component, thereby forming a connection body of the superconducting quantum interference device 102 and the carrier board 106;
3) providing a connecting rod and a non-magnetic Dewar 101, firstly installing the connecting rod on the carrier plate 106 in the step 2) through a connecting threaded hole, then placing a connecting body of the superconducting quantum interference device 102 and the carrier plate 106 in the step 2) on the bottom of the non-magnetic Dewar 101 (namely a Dewar flask bottom 1011) through the connecting rod, installing the carrier plate 106 on the Dewar flask bottom 1011 through a connecting mechanism, and finally taking out the connecting rod, wherein before or after the connecting rod is taken out, the lead interface 104 is required to be installed at the top end of the non-magnetic Dewar 101, so that the mechanical integration of the superconducting quantum interference device 102 and the non-magnetic Dewar 101 is formed;
4) providing a cryogenic insert 105, inserting the cryogenic insert 105 from the top end of the nonmagnetic dewar 101, and mounting the mounting top plate 1051 on the top end surface of the nonmagnetic dewar 101, thereby realizing the fixed mounting of the cryogenic insert 107 and the nonmagnetic dewar 101, and thus realizing the integrated mounting of the cryogenic system.
Example two
As shown in fig. 2, the present embodiment provides a superconducting quantum interference system, the superconducting quantum interference system 10 including: cryogenic system 100 as described in example one.
As an example, as shown in fig. 2, the superconducting quantum interference system 10 further includes an ambient temperature system 200, where the ambient temperature system 200 includes:
a readout module 201 connected to the lead interface 104 for reading the output of the superconducting quantum interference device 102;
and the data acquisition and processing module 202 is connected to the output end of the readout module 201 and is used for acquiring and processing data of the output of the readout module 201.
Specifically, the readout module 201 is any existing circuit structure capable of reading the output of the superconducting quantum interference device 102, and the specific circuit is not limited in this example.
Specifically, the data acquisition processing module 202 is any existing device capable of realizing data acquisition and processing, such as an upper computer.
In summary, according to the cryogenic system and the superconducting quantum interference system, the superconducting quantum interference device is installed at the bottom of the nonmagnetic dewar, and the low-temperature lead arranged on the inner wall of the nonmagnetic dewar and the lead interface arranged at the top end of the nonmagnetic dewar are used for leading out electric signals, so that the superconducting quantum interference device and the low-temperature insert are integrally separated, and vibration interference caused by the cantilever structure is eliminated; meanwhile, the low-temperature insert only has a single low-temperature heat insulation function, so that the low-temperature insert can be manufactured into a standard module. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value. The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (9)
1. A cryogenic system, comprising:
a non-magnetic dewar comprising: the Dewar flask comprises a Dewar flask bottom and a Dewar flask body which is connected with the Dewar flask bottom and extends upwards, wherein the Dewar flask bottom and the Dewar flask body jointly enclose a flask inner space;
the superconducting quantum interference device is arranged in the space in the bottle and is arranged at the bottom of the Dewar bottle;
a low-temperature lead wire which is arranged in the bottle inner space, one end of the low-temperature lead wire is connected with the lead terminal of the superconducting quantum interference device, and the low-temperature lead wire extends upwards along the inner wall of the Dewar bottle body so that the other end of the low-temperature lead wire is connected with a lead wire interface, wherein the lead wire interface is arranged on the top end surface of the Dewar bottle body;
and the low-temperature insert is inserted and installed on the top end surface of the Dewar flask body.
2. The cryogenic system of claim 1, wherein the superconducting quantum interference device is mounted to the dewar base based on a carrier plate; the superconducting quantum interference device is arranged on the carrier plate through a connecting component, and the carrier plate is arranged at the bottom of the Dewar flask through a connecting mechanism.
3. The cryogenic system of claim 2, wherein the connection component comprises a screw; at this time, a device threaded hole adapted to the screw is formed in the superconducting quantum interference device, and a device-carrier plate threaded hole adapted to the screw is formed in a position corresponding to the carrier plate.
4. The cryogenic system of claim 3, wherein the connection mechanism comprises a screw; at the moment, a bottle bottom threaded hole matched with the screw is formed in the bottom of the Dewar flask, a bottle bottom-carrier plate threaded hole matched with the screw is formed in the position corresponding to the carrier plate, and the distance between the bottle bottom-carrier plate threaded hole and the edge of the carrier plate is smaller than the distance between the device-carrier plate threaded hole and the edge of the carrier plate.
5. The cryogenic system of claim 3, wherein the connection mechanism comprises: the nut and the threaded column are arranged at the bottom of the Dewar flask and are matched with the nut; at this time, a mounting hole is arranged at a position corresponding to the carrier plate, wherein the distance between the mounting hole and the edge of the carrier plate is smaller than the distance between the device-carrier plate threaded hole and the edge of the carrier plate.
6. The cryogenic system of claim 4 or 5, wherein the carrier plate is further provided with a connection threaded hole, wherein the distance between the connection threaded hole and the edge of the carrier plate is smaller than the distance between the device-carrier plate threaded hole and the edge of the carrier plate.
7. The cryogenic system of any one of claims 1 to 6, wherein the cryogenic insert comprises: the device comprises a mounting top plate mounted on the top end face of the Dewar flask body, a layered heat insulation plate inserted into the space in the flask, and a liquid conveying pipe penetrating through the mounting top plate and the layered heat insulation plate; the mounting top plate is provided with a lead interface mounting opening, a liquid inlet of the liquid conveying pipe is bonded to the upper surface of the mounting top plate, and a liquid outlet of the liquid conveying pipe is bonded to the lower surface of the layered heat insulation plate.
8. The cryogenic system of claim 7, wherein the cryogenic insert further comprises: and the heat insulation gap is arranged between the mounting top plate and the layered heat insulation plate.
9. A superconducting quantum interference system, comprising: the cryogenic system of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110145543.2A CN112946761A (en) | 2021-02-02 | 2021-02-02 | Cryogenic system and superconducting quantum interference system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110145543.2A CN112946761A (en) | 2021-02-02 | 2021-02-02 | Cryogenic system and superconducting quantum interference system |
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| CN202110145543.2A Pending CN112946761A (en) | 2021-02-02 | 2021-02-02 | Cryogenic system and superconducting quantum interference system |
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| US20080121035A1 (en) * | 2006-11-23 | 2008-05-29 | Technological Resources Pty. Ltd. | Gravity Gradiometer |
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| CN205691792U (en) * | 2016-05-11 | 2016-11-16 | 北京斯奎德量子技术有限公司 | A kind of Dewar device of superconduction geomagnetic exploration instrument |
| CN111157926A (en) * | 2020-01-03 | 2020-05-15 | 北京交通大学 | Dewar device for high-temperature superconducting magnet quench detection experiment |
| CN111239497A (en) * | 2020-01-23 | 2020-06-05 | 天津大学 | Novel high-temperature superconducting conductor alternating current loss measuring device and measuring method |
-
2021
- 2021-02-02 CN CN202110145543.2A patent/CN112946761A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080121035A1 (en) * | 2006-11-23 | 2008-05-29 | Technological Resources Pty. Ltd. | Gravity Gradiometer |
| CN101478322A (en) * | 2009-01-22 | 2009-07-08 | 北京复高科技有限公司 | Low frequency communication receiving system |
| CN105785288A (en) * | 2014-12-19 | 2016-07-20 | 中国科学院上海微系统与信息技术研究所 | Aeromagnetic survey device based on low-temperature superconductive SQUID |
| CN205691792U (en) * | 2016-05-11 | 2016-11-16 | 北京斯奎德量子技术有限公司 | A kind of Dewar device of superconduction geomagnetic exploration instrument |
| CN111157926A (en) * | 2020-01-03 | 2020-05-15 | 北京交通大学 | Dewar device for high-temperature superconducting magnet quench detection experiment |
| CN111239497A (en) * | 2020-01-23 | 2020-06-05 | 天津大学 | Novel high-temperature superconducting conductor alternating current loss measuring device and measuring method |
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