Loss measurements on superconducting Nb by a cryogenic dual compensated calorimeter for the implementation of the kilogram standard by the levitation mass method

H. Kajastie (Corresponding Author), Kaj Nummila, Anssi Rautiainen, K. Riski, A. Satrapinski

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

A 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.
Original languageEnglish
Pages (from-to)68 - 74
Number of pages7
JournalMetrologia
Volume45
Issue number1
DOIs
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed

Keywords

  • energy loss measurement
  • materials
  • superconductivity
  • superconducting calorimeters
  • cryogenic
  • niobium

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