Cool-down characteristic of conduction-cooled superconducting magnet by a cryocooler
| Autor: | Yeon Suk Choi, D.W. Shin, D.L. Kim |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Condensed matter physics Physics::Instrumentation and Detectors Nuclear engineering Energy Engineering and Power Technology Superconducting magnet Superconducting magnetic energy storage Heat sink Cryocooler Condensed Matter Physics Cooling capacity Thermal conduction Electronic Optical and Magnetic Materials Condensed Matter::Superconductivity Magnet Heat transfer Electrical and Electronic Engineering |
| Zdroj: | Physica C: Superconductivity and its Applications. 471:1440-1444 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2011.05.212 |
| Popis: | The initial cooling is crucial in conduction-cooled superconducting magnet system. Since a cryocooler is the only heat sink in conduction-cooled superconducting magnet system, the initial cool-down time is strongly dependent upon the refrigeration capacity of cryocooler. In this paper, the process of estimation of initial cool-down time is presented. The procedure includes the modeling of properties of low temperature superconductor, the dimensions of superconducting magnet, the cryogenic loads, the thermal link between magnet and cryocooler, and the available refrigerating capacity of a cryocooler. The method is applied to the 3 T superconducting magnet cooled by a two-stage GM cryocooler, showing that the results of proposed method have a good agreement with those of experiment. The effects of superconducting magnet size and secondary thermal link on the cool-down characteristic are also discussed. |
| Databáze: | OpenAIRE |
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