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; Kaj Nummila; Anssi Rautiainen; K. Riski; A. Satrapinski

doi:10.1088/0026-1394/45/1/010

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

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Research output: Contribution to journal › Article › Scientific › peer-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 language	English
Pages (from-to)	68 - 74
Number of pages	7
Journal	Metrologia
Volume	45
Issue number	1
DOIs	https://doi.org/10.1088/0026-1394/45/1/010
Publication status	Published - 2008
MoE publication type	A1 Journal article-refereed

Keywords

energy loss measurement
materials
superconductivity
superconducting calorimeters
cryogenic
niobium

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10.1088/0026-1394/45/1/010

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

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.",

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Loss measurements on superconducting Nb by a cryogenic dual compensated calorimeter for the implementation of the kilogram standard by the levitation mass method. / Kajastie, H. (Corresponding Author); Nummila, Kaj; Rautiainen, Anssi; Riski, K.; Satrapinski, A.

In: Metrologia, Vol. 45, No. 1, 2008, p. 68 - 74.

Research output: Contribution to journal › Article › Scientific › peer-review

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T1 - Loss measurements on superconducting Nb by a cryogenic dual compensated calorimeter for the implementation of the kilogram standard by the levitation mass method

AU - Kajastie, H.

AU - Nummila, Kaj

AU - Rautiainen, Anssi

AU - Riski, K.

AU - Satrapinski, A.

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

KW - energy loss measurement

KW - materials

KW - superconductivity

KW - superconducting calorimeters

KW - cryogenic

KW - niobium

U2 - 10.1088/0026-1394/45/1/010

DO - 10.1088/0026-1394/45/1/010

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