CN103617859B - For low temperature and the high-temperature superconductor hybrid magnet of high ambient field - Google Patents
For low temperature and the high-temperature superconductor hybrid magnet of high ambient field Download PDFInfo
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- CN103617859B CN103617859B CN201310554826.8A CN201310554826A CN103617859B CN 103617859 B CN103617859 B CN 103617859B CN 201310554826 A CN201310554826 A CN 201310554826A CN 103617859 B CN103617859 B CN 103617859B
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Abstract
The invention discloses a kind of low temperature for high ambient field and high-temperature superconductor hybrid magnet, include internal high temperature superconducting magnet assembly, outer low temperature superconductor component, internal high temperature superconducting magnet assembly and outer low temperature superconductor component are independently nested again after machine-shaping is welded into an overall structure.The present invention meeting under the precondition that superconducting magnet system normally works, can realize superconducting conductor safe operation under high ambient field, improves the maximum running current of superconducting magnet, improves the runnability of superconducting magnet further.Adopt the outside of hybrid magnet coil to adopt cryogenic magnet effectively can reduce the processing and manufacturing cost of magnet coil simultaneously.
Description
Technical field
The present invention relates to superconducting magnet field, the mixing superconducting magnet coil related generally to for high ambient field designs, be specially and adopt high-temperature superconducting magnet conductor to become mixing nested magnets with the processing and manufacturing of cryogenic magnet conductor, solve the problem of superconducting magnet coil quench under high background magnetic field strength condition.
Background technology
High background magnetic field intensity is the major technology bottleneck of restriction large scale superconducting magnet coil development.Along with large scale superconducting magnet device is as the development of magnetic trapped fusion apparatus and high-energy physics device, in limited assembly space, realize the superconducting magnet coil providing high magnetic field intensity, when running it, critical field strength restrictive condition brings very large challenge.Current Nb
3sn superconducting magnet is under the temperature conditions of 5K, and background lectromagnetism field during its actual motion all controls within 13T.And the maximum magnetic field strength that superconducting magnet coil can provide exactly directly affects the performance parameter of large scale superconducting magnet device.Therefore, how to solve superconducting magnet stable operation under finite size and higher magnetic field intensity condition, become the subject matter affecting following superconduction engineering development.
It is comparatively ripe that the performance of the first generation and second-generation high-temperature superconductor is studied at present, its mainly using silver-colored jacket based on basis material or coating material.Relative to cryogenic magnet, high-temperature superconducting magnet not only can obtain very high Practical Project current density (as Bi
2212the critical current density jc (4.2k, 20T) of band is about 500-600A/mm
2), there is very high critical field strength (critical field strength of current high-temperature superconducting magnet generally can reach more than 15T) simultaneously.Secondly, the advantage of high-temperature superconducting magnet is from 10T-20T, and its critical current density jc is almost constant.Therefore, run in the environment of highfield, high-temperature superconducting magnet has very large advantage relative to low temperature superconductor material at aspect of performance.But the cost of high temperature superconducting materia will exceed much relative to low temperature superconducting material.Therefore, the processing cost how controlling superconducting magnet becomes the problem needing to solve equally.
For realizing low temperature and high-temperature superconductor hybrid magnet, the mainly nesting type structure of high ambient field, its inner employing high-temperature superconducting magnet, outside employing cryogenic magnet, effectively can ensure magnet coil stable operation under high ambient field.Adopt the outside of hybrid magnet coil to adopt cryogenic magnet effectively can reduce the processing and manufacturing cost of magnet coil simultaneously.According to the design parameter requirement of the superconducting magnet coil of reality, the physical dimension of carrying out internal high temperature superconducting magnet and outer low temperature superconducting magnet is distributed, under the prerequisite ensureing the most high field intensity designing requirement of hybrid magnet coil, consider the most high magnetic field intensity on outer low temperature superconducting magnet coil, exceed its critical field strength to avoid the most high field intensity of outer low temperature superconducting magnet coil.
Summary of the invention
The object of the invention is to propose a kind of low temperature for high ambient field and high-temperature superconductor hybrid magnet, it can meet when limited magnet coil size, provides and exceedes the maximum critical field strength of current cryogenic magnet (according to Nb
3sn conductor 13T under 4.5K condition is standard) magnetic field intensity, and the stable operation of magnet coil can be ensured, the outside consumption adopting the mentality of designing of cryogenic magnet effectively can reduce high-temperature superconducting magnet conductor simultaneously, to reduce Practical Project processing cost.
Technical scheme of the present invention is as follows:
For low temperature and the high-temperature superconductor hybrid magnet of high ambient field, it is characterized in that: include internal high temperature superconducting magnet assembly, outer low temperature superconductor component, described internal high temperature superconductor component includes insulation against ground housing, many group separate unit structures are provided with in insulation against ground housing, often organize separate unit structure and include basal body structure one, the coldplate with cooling bath is inserted in the middle part of basal body structure one, both sides basal body structure one being positioned at coldplate are inlaid with one group of high-temperature superconductor conductor respectively, coldplate is close to high-temperature superconductor conductor and is high-temperature superconductor conductor heat conducting and radiating, the sidewall of insulation against ground housing is provided with the sub-cooled gas inlet that some and each cooling bay is communicated with, described outer low temperature superconductor component includes basal body structure two, and basal body structure two is inlaid with many group low-temperature superconducting conductors, low-temperature superconducting conductor is provided with helium gas cooling hole, center, is provided with interlevel insulator between each group low-temperature superconducting conductor,
Described internal high temperature superconducting magnet assembly is welded into an overall structure with nested again after outer low temperature superconductor component independently machine-shaping.
The described low temperature for high ambient field and high-temperature superconductor hybrid magnet, is characterized in that: described basal body structure one adopts G10 material.
The described low temperature for high ambient field and high-temperature superconductor hybrid magnet, is characterized in that: the both sides of described basal body structure one are provided with bolt hole.
The described low temperature for high ambient field and high-temperature superconductor hybrid magnet, it is characterized in that: after each group of described high-temperature superconductor conductor and coldplate are independently processed into separate unit structure, each separate unit structure is shaping by the bolts assemblies in many groups through bolt hole, both sides.
The described low temperature for high ambient field and high-temperature superconductor hybrid magnet, is characterized in that: described basal body structure two adopts stainless steel.
The described low temperature for high ambient field and high-temperature superconductor hybrid magnet, is characterized in that: described low-temperature superconducting conductor adopts traditional CICC conductor structure, according to maximum magnetic field strength choice for use NbTi or Nb of low-temperature superconducting conductor part during actual motion
3sn.
Beneficial effect of the present invention is:
The present invention meeting under the precondition that superconducting magnet system normally works, can realize superconducting conductor safe operation under high ambient field, improves the maximum running current of superconducting magnet, improves the runnability of superconducting magnet further.Adopt the outside of hybrid magnet coil to adopt cryogenic magnet effectively can reduce the processing and manufacturing cost of magnet coil simultaneously.
Accompanying drawing explanation
Fig. 1 is perspective view of the present invention.
Fig. 2 is plan structure schematic diagram of the present invention.
Fig. 3 is the assembly structure schematic diagram of internal high temperature superconducting magnet assembly in the present invention.
Fig. 4 is internal high temperature superconducting magnet assembly local detail structure cutaway view of the present invention.
Fig. 5 is outer low temperature superconductor component local detail structure cutaway view of the present invention.
Embodiment
See accompanying drawing 1-5, for low temperature and the high-temperature superconductor hybrid magnet of high ambient field, include internal high temperature superconducting magnet assembly 1, outer low temperature superconductor component 2, internal high temperature superconductor component 1 forms by organizing separate unit structure more, comprises insulation against ground housing 3, the coldplate 4 with cooling bath 9, high-temperature superconductor conductor 5, the basal body structure 6 of G10 material, the critical piece such as sub-cooled gas inlet 7 and assembling bolt 8.High-temperature superconductor conductor 5 is embedded in every layer independently on basal body structure 6, and coldplate 4 is close to high-temperature superconductor conductor 5 and basal body structure 6, and coldplate 4 offers the liquid helium that cooling bath 9(passes to 20K) to be lowered the temperature to high-temperature superconductor conductor 5 by heat transfer.Every layer of coldplate 4 arranges independently liquid helium air inlet 7 and gas outlet.Polyimide film be the insulating barrier 10 of main material be placed in often two-layer independently (between a upper unit basal body structure 6 and next unit coldplate 4) between cellular construction, play layer insulation effect.After the structure of high-temperature superconducting magnet mainly adopts multi-layer conductive winding and coldplate to be independently processed into separate unit, the bolt hole 11 finally by both sides adopts many group bolts 8 to assemble shaping, finally adopts VPI processes to complete insulation against ground layer.
Outer low temperature superconducting magnet assembly 2 is mainly mainly as the magnet of the outside side, low field of hybrid magnet, the maximum field strength of its stable operation lower than 13T, should mainly comprise low-temperature superconducting conductor 12(containing helium gas cooling hole, center 16) and the critical piece such as basal body structure material (stainless steel) 13 and 14 and layer insulation 15; Described cryogenic magnet part 2, its low-temperature superconducting conductor 12 adopts traditional CICC conductor structure, processes identical with current cryogenic magnet with stranded cable technique.Conductor material is according to maximum magnetic field strength choice for use NbTi or Nb of cryogenic magnet part during actual motion
3sn.Its insulating process adopts the processing technology identical with cryogenic magnet, namely designs turn-to-turn, interlayer and insulation against ground.
Package assembly is nested again after mainly internal high temperature superconducting magnet 1 separately being manufactured processing separately with outer low temperature superconducting magnet 2 is welded into an overall structure.
Claims (6)
1. for low temperature and the high-temperature superconductor hybrid magnet of high ambient field, it is characterized in that: include internal high temperature superconducting magnet assembly, outer low temperature superconductor component, described internal high temperature superconducting magnet assembly includes insulation against ground housing, many group separate unit structures are provided with in insulation against ground housing, often organize separate unit structure and include basal body structure one, the coldplate with cooling bath is inserted in the middle part of basal body structure one, both sides basal body structure one being positioned at coldplate are inlaid with one group of high-temperature superconductor conductor respectively, coldplate is close to high-temperature superconductor conductor and is high-temperature superconductor conductor heat conducting and radiating, every layer of coldplate arranges independently liquid helium air inlet and gas outlet, insulating barrier is provided with between a upper unit basal body structure and next unit coldplate
,the sidewall of insulation against ground housing is provided with the cryogenic coolant that some and each cooling bath is communicated with and imports and exports, described outer low temperature superconductor component includes basal body structure two, and basal body structure two is inlaid with many group low-temperature superconducting conductors, low-temperature superconducting conductor is provided with helium gas cooling hole, center, is provided with interlevel insulator between each group low-temperature superconducting conductor, after described internal high temperature superconducting magnet assembly adopts multi-layer conductive winding and coldplate to be independently processed into separate unit, adopt many group bolts assemblies shaping by the bolt hole of both sides, finally adopt VPI processes to complete insulation against ground layer.
2. the low temperature for high ambient field according to claim 1 and high-temperature superconductor hybrid magnet, is characterized in that: described basal body structure one adopts G10 material.
3. the low temperature for high ambient field according to claim 1 and high-temperature superconductor hybrid magnet, is characterized in that: the both sides of described basal body structure one are provided with bolt hole.
4. the low temperature for high ambient field according to claim 1 or 3 and high-temperature superconductor hybrid magnet, it is characterized in that: after each group of described high-temperature superconductor conductor and coldplate are independently processed into separate unit structure, each separate unit structure is shaping by the bolts assemblies in many groups through bolt hole, both sides.
5. the low temperature for high ambient field according to claim 1 and high-temperature superconductor hybrid magnet, is characterized in that: described basal body structure two adopts stainless steel.
6. the low temperature for high ambient field according to claim 1 and high-temperature superconductor hybrid magnet, it is characterized in that: described low-temperature superconducting conductor adopts traditional CICC conductor structure, according to maximum magnetic field strength choice for use NbTi or Nb of low-temperature superconducting conductor part during actual motion
3sn.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310554826.8A CN103617859B (en) | 2013-11-09 | 2013-11-09 | For low temperature and the high-temperature superconductor hybrid magnet of high ambient field |
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| CN201310554826.8A CN103617859B (en) | 2013-11-09 | 2013-11-09 | For low temperature and the high-temperature superconductor hybrid magnet of high ambient field |
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| CN103617859B true CN103617859B (en) | 2016-02-17 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694908A (en) * | 2009-09-30 | 2010-04-14 | 中国科学院等离子体物理研究所 | Low temperature superconducting assembly with low joint resistance for high temperature superconducting current lead cold end |
| CN101728051A (en) * | 2010-02-03 | 2010-06-09 | 中国科学院电工研究所 | High-field superconducting magnet system with wide separation gaps |
-
2013
- 2013-11-09 CN CN201310554826.8A patent/CN103617859B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694908A (en) * | 2009-09-30 | 2010-04-14 | 中国科学院等离子体物理研究所 | Low temperature superconducting assembly with low joint resistance for high temperature superconducting current lead cold end |
| CN101728051A (en) * | 2010-02-03 | 2010-06-09 | 中国科学院电工研究所 | High-field superconducting magnet system with wide separation gaps |
Non-Patent Citations (2)
| Title |
|---|
| 低温/高温复合超导体中的电流分布的研究;周微微等;《低温物理学报》;20080229;第30卷(第1期);第33页至第36页 * |
| 低温/高温复合超导体的热稳定性的数值模拟研究;周微微等;《低温物理学报》;20080531;第30卷(第2期);第145页至第149页 * |
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