H Kajastie et al 2008 Metrologia 45 68 doi:10.1088/0026-1394/45/1/010
H Kajastie1, K K Nummila2, A Rautiainen2, K Riski1 and A Satrapinski1
Show affiliationsA cryogenic dual compensated calorimeter was constructed for energy loss measurements in superconducting materials. The losses induced by slowly varying periodic magnetic fields (amplitudes <50 mT) in field-generating coils fabricated from different niobium wires were at the level of 500 nJ/cycle. Measurable losses are caused by incomplete Meissner effect in tested superconducting materials. The results of the study show the difficulties and limitations in the implementation of the kilogram standard using the 'superconducting magnetic levitation mass' method.
84.71.Ba Superconducting magnets; magnetic levitation devices
74.70.Ad Metals; alloys and binary compounds (including A15, MgB2, etc.)
Issue 1 (February 2008)
Received 1 June 2007
Published 8 January 2008
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