A large dilution refrigerator for polarized target experiments

The refrigerator for the SMC polarized target at CERN (NA47) is by farthe largest dilution refrigerator in operation for this purpose. The target is loaded cold, horizontally into the mixing chamber, which is sealed with a cold indium seal. In "frozen" mode a circulation of 30 mmol/s gives...

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Detalles Bibliográficos
Autores principales: Berglund, P, Kyynäräinen, J, Niinikoski, T O
Lenguaje:eng
Publicado: 1994
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.1016/S0011-2275(05)80051-7
http://cds.cern.ch/record/300927
Descripción
Sumario:The refrigerator for the SMC polarized target at CERN (NA47) is by farthe largest dilution refrigerator in operation for this purpose. The target is loaded cold, horizontally into the mixing chamber, which is sealed with a cold indium seal. In "frozen" mode a circulation of 30 mmol/s gives a base temperature of 30 mK. A proton target is polarized to 90 % at 300 mK with a circulation of 180 mmol/s.

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