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Design, fabrication, and testing of a low AC-loss conduction-cooled cryostat for magnetization loss measurement apparatus

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Design, fabrication, and testing of a low AC-loss conduction-cooled cryostat for magnetization loss measurement apparatus. / Järvelä, Joonas; Lyly, M.; Stenvall, Antti; Juntunen, Raimo; Souc, J.; Mikkonen, Risto.

In: IEEE Transactions on Applied Superconductivity, Vol. 25, No. 1, 01.02.2015.

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Järvelä, Joonas ; Lyly, M. ; Stenvall, Antti ; Juntunen, Raimo ; Souc, J. ; Mikkonen, Risto. / Design, fabrication, and testing of a low AC-loss conduction-cooled cryostat for magnetization loss measurement apparatus. In: IEEE Transactions on Applied Superconductivity. 2015 ; Vol. 25, No. 1.

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@article{3dee8a27a3e448ab8e985fd53d7a677d,
title = "Design, fabrication, and testing of a low AC-loss conduction-cooled cryostat for magnetization loss measurement apparatus",
abstract = "Conduction cooling has become a viable alternative for cooling superconducting devices. However, the thermal pathways of a conduction-cooled cryostat can be problematic for applications where time-varying magnetic fields are present. Such alternating magnetic fields are present, e.g., in a magnetization ac-loss measurement system. The losses in the thermal pathways are unwanted as they increase the heat load into the cryostat and interfere with the measurement. To solve this challenge, a conduction-cooled cryostat with special attention in limiting eddy-current losses in the cryostat structures was constructed. The design process is illustrated in detail starting from the specifications and proceeding through the fabrication of individual components. The loss dissipated in the cryostat is experimentally examined, and the finished conduction-cooled magnetization loss measurement system is demonstrated by characterizing a multifilamentary \hbox{MgB}-{2} conductor.",
author = "Joonas J{\"a}rvel{\"a} and M. Lyly and Antti Stenvall and Raimo Juntunen and J. Souc and Risto Mikkonen",
year = "2015",
month = "2",
day = "1",
doi = "10.1109/TASC.2014.2357754",
language = "English",
volume = "25",
journal = "IEEE Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronics Engineers",
number = "1",

}

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TY - JOUR

T1 - Design, fabrication, and testing of a low AC-loss conduction-cooled cryostat for magnetization loss measurement apparatus

AU - Järvelä, Joonas

AU - Lyly, M.

AU - Stenvall, Antti

AU - Juntunen, Raimo

AU - Souc, J.

AU - Mikkonen, Risto

PY - 2015/2/1

Y1 - 2015/2/1

N2 - Conduction cooling has become a viable alternative for cooling superconducting devices. However, the thermal pathways of a conduction-cooled cryostat can be problematic for applications where time-varying magnetic fields are present. Such alternating magnetic fields are present, e.g., in a magnetization ac-loss measurement system. The losses in the thermal pathways are unwanted as they increase the heat load into the cryostat and interfere with the measurement. To solve this challenge, a conduction-cooled cryostat with special attention in limiting eddy-current losses in the cryostat structures was constructed. The design process is illustrated in detail starting from the specifications and proceeding through the fabrication of individual components. The loss dissipated in the cryostat is experimentally examined, and the finished conduction-cooled magnetization loss measurement system is demonstrated by characterizing a multifilamentary \hbox{MgB}-{2} conductor.

AB - Conduction cooling has become a viable alternative for cooling superconducting devices. However, the thermal pathways of a conduction-cooled cryostat can be problematic for applications where time-varying magnetic fields are present. Such alternating magnetic fields are present, e.g., in a magnetization ac-loss measurement system. The losses in the thermal pathways are unwanted as they increase the heat load into the cryostat and interfere with the measurement. To solve this challenge, a conduction-cooled cryostat with special attention in limiting eddy-current losses in the cryostat structures was constructed. The design process is illustrated in detail starting from the specifications and proceeding through the fabrication of individual components. The loss dissipated in the cryostat is experimentally examined, and the finished conduction-cooled magnetization loss measurement system is demonstrated by characterizing a multifilamentary \hbox{MgB}-{2} conductor.

U2 - 10.1109/TASC.2014.2357754

DO - 10.1109/TASC.2014.2357754

M3 - Article

VL - 25

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

IS - 1

ER -