A pulsed superconducting magnet for a static magnetic refrigerator operating between 1.8 K and 4.5 K
| Autor: | J. Casas-Cubillos, M. Marquet, A. Bézaguet, M. Schmidt, A. Cyvoct, Ph. Lebrun, R. Losserand-Madoux |
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| Rok vydání: | 1994 |
| Předmět: |
Physics
Large Hadron Collider Electromagnet Condensed matter physics Physics::Instrumentation and Detectors Superconducting wire chemistry.chemical_element Superconducting magnet engineering.material Accelerators and Storage Rings Electronic Optical and Magnetic Materials law.invention chemistry law Electromagnetic coil Magnet engineering Magnetic refrigeration Electrical and Electronic Engineering Helium |
| Zdroj: | IEEE Transactions on Magnetics. 30:2138-2141 |
| ISSN: | 1941-0069 0018-9464 |
| Popis: | Superfluid helium is increasingly used as a technical cooling medium in large-scale research projects involving high-field superconducting magnets, such as the CERN Large Hadron Collider (LHC). For refrigeration cycles operating below the normal boiling point of helium, a potentially interesting alternative to vapour compression is magnetic refrigeration, pioneered decades ago. In the framework of development for an industrial-size 1.8 K magnetic refrigerator using a static active material, we have designed, built and tested a pulsed superconducting magnet producing up to 3 T at a ramping rate of 6.5 T/s. The solenoid-type coil, wound with low-loss superconducting wire (small-filament NbTi in a composite Cu/Cu-Ni matrix), is internally cooled by normal boiling helium, and installed inside a toroidal yoke, made of tapered laminations of commercially pure iron. After describing design and construction of the magnet, we present test results and measurements of performance, field quality and pulsed-operation losses. > |
| Databáze: | OpenAIRE |
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