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Faculté des Sciences appliquées
Faculté des Sciences appliquées
MASTER THESIS
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Design and construction of a magnetic torque measurement system at cryogenic temperature

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Brialmont, Sébastien ULiège
Promotor(s) : Vanderbemden, Philippe ULiège
Date of defense : 25-Jun-2018/26-Jun-2018 • Permalink : http://hdl.handle.net/2268.2/4607
Details
Title : Design and construction of a magnetic torque measurement system at cryogenic temperature
Translated title : [fr] Conception et construction d'un système de mesure de couple magnétique à température cryogénique
Author : Brialmont, Sébastien ULiège
Date of defense  : 25-Jun-2018/26-Jun-2018
Advisor(s) : Vanderbemden, Philippe ULiège
Committee's member(s) : Vanderheyden, Benoît ULiège
Gilet, Tristan ULiège
Silhanek, Alejandro ULiège
Language : English
Number of pages : 71
Keywords : [en] Torque magnetometry
[en] superconductor
[en] permanent magnets
[en] Torquemeter
[en] Stacked tapes
Discipline(s) : Engineering, computing & technology > Electrical & electronics engineering
Target public : Researchers
Professionals of domain
Student
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en ingénieur civil physicien, à finalité approfondie
Faculty: Master thesis of the Faculté des Sciences appliquées

Abstract

[en] Development of new techniques for the non-destructive characterization of superconducting materials becomes challenging. Several magnetometry techniques exist but do not accommodate sizable samples. Other magnetometers are designed for the characterization of large samples in a non-destructive way but require specific working conditions. In this master thesis we designed and realized a new magnetic torque measurement system able to characterize magnetic samples of approximately 1 cm$^3$ at both room and cryogenic temperatures. This device can be used for torque magnetometry with an intermediate sensitivity between miniature torque magnetometers designed to work at cryogenic temperature and commercial torquemeters poorly adapted to extreme conditions. The torque sensing system is based on four piezoresistive strain gauges glued on a cylindrical transmission shaft. The measurement system was first calibrated at room temperature using a small coil fed with a DC current. Then the system was tested on three different magnetic samples in order to measure their magnetic moment under crossed fields conditions: a neodymium permanent magnet, a bulk superconducting sample and a stack of superconducting tapes. The results were shown to be in a good agreement with those observed from literature. In particular, the demagnetization effect was highlighted under these crossed fields conditions. Such conditions can be encountered for instance in rotating machines applications.


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Author

  • Brialmont, Sébastien ULiège Université de Liège > Master ingé. civ. phys., à fin.

Promotor(s)

Committee's member(s)

  • Vanderheyden, Benoît ULiège Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes
    ORBi View his publications on ORBi
  • Gilet, Tristan ULiège Université de Liège - ULiège > Département d'aérospatiale et mécanique > Microfluidique
    ORBi View his publications on ORBi
  • Silhanek, Alejandro ULiège Université de Liège - ULiège > Département de physique > Physique expérimentale des matériaux nanostructurés
    ORBi View his publications on ORBi
  • Total number of views 112
  • Total number of downloads 41










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