Instrumentation & Measurement Magazine 24-9 - 46

specific applications a relatively effortless task. Nevertheless,
the magnetic forces on the body of the sensor must be carefully
quantified during the design phase in order to decide if the
spurious effects are acceptable for the application under consideration.
The sensors developed for the Q1-type HL-LHC
beam screen magnet quench test campaign demonstrated
a maximum percent error is 0.4% and a maximum linearity
deviation of ±0.2%, so that all of the cases fell within the acceptability
criteria of ASTM F2537 standard.
Future steps in the development of this kind of sensor will
aim at increasing further the confidence in the measurements.
An experimental validation of the calculated magnetic forces
over the body of the sensor will be performed under controlled
conditions inside a research cryostat equipped with a superconducting
magnet. Additionally, effort will be devoted to
determine the linearity in dynamic conditions.
Acknowledgment
The authors would like to warmly thank Marco Morrone for
performing the magnetic forces simulations, as well as the
fruitful collaboration during the Q1-type HL-LHC quench
test campaign, and thank Lukasz Scislo for the experimental
modal analysis on the structure.
References
[1] E. Todesco et al., " A first baseline for the magnets in the high
luminosity LHC insertion regions, " IEEE Trans. Appl. Supercond.,
vol. 24, no. 3, 2014.
[2] P. L. Walstrom, " Strain gauges for superconducting magnet
testing, " Cryogenics (Guildf), vol. 20, no. 9, 1980.
[3] A. Bouchardy, " Caractérisation des mesures de déformation par
jauges d'extensomètrie à température cryogénique, " (French),
CERN EDMS Document 1073153. [Online]. Available: https://
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1870136352:subDocs.
[4] F. Carra et al., " Crab cavity and cryomodule development for HLLHC, "
in Proc. SRF2015, 2015.
[5] V. Baglin, C. Garion, and R. Kersevan, " Preliminary design of the
high-luminosity LHC beam screen with shielding, " in Proc. 6th
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[6] M. Morrone, C. Garion, M. Aurisicchio, and P. Chiggiato, " A
coupled multiphysics FEM model to investigate electromagnetic,
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of the High-Luminosity Large Hadron Collider beam screen, "
Appl. Math. Model., vol. 57, 2018.
[7] M. Morrone, C. Garion, P. Chiggiato, Ó. Sacristán, M. Guinchard,
and L. Fiscarelli, " Mechanical behavior of the shielded HLLHC
beam screen during a magnet quench, " IEEE Trans. Appl.
Supercond., vol. 31, no. 6, 2021.
[8] G. Vallone et al., " Summary of the mechanical performances of the
1.5 m long models of the Nb3 Sn low-β quadrupole MQXF, " IEEE
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[9] M. Guinchard et al., " Mechanical strain measurements based on
fiber Bragg grating down to cryogenic temperature - precision
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46
[10] E. Ravaioli et al., " Protecting a full-scale Nb3Sn magnet with
CLIQ, the new coupling-loss-induced quench system, " IEEE
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[11] Standard Practice for Calibration of Linear Displacement Sensor
Systems Used to Measure Micromotion, ASTM F2537 - 06(2017),
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org/Standards/F2537.htm.
[12] " Zwick Roell Z400 Universal Testing Machine Technical
Specifications, " Z. R. GMBH, accessed Jun. 05, 2021. [Online].
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[13] " HBM® WI LVDT Technical Specifications, " HBM GMBH,
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de/sites/default/files/dd_product/W 130 S_0.pdf.
Óscar Sacristán de Frutos (oscar.sacristan@cern.ch) holds a
position at the CERN Mechanical Measurements Laboratory,
where he is currently involved in the characterization of advanced
materials and mechanical assemblies and systems
from the thermal and mechanical point of view. He graduated
in mechanical engineering and earned a degree from the
University of Valladolid, Spain in 2008. Prior to his arrival at
CERN, he held several positions as an international research,
technology and development projects manager, where he
coordinated projects in the fields of mechanical testing, advanced
manufacturing techniques and aeronautics.
António Carvalhosa (antonio.carvalhosa@outlook.com)
joined CERN Mechanical Measurements Laboratory in 2017,
where until 2020, he participated in the mechanical characterization
of novel materials, assemblies and systems used in a
wide range of temperatures and in stringent environments.
He earned a degree in mechanical engineering from the Instituto
Superior Técnico at the University of Lisbon, Portugal.
His master's degree research was oriented to the production
field, which included academical projects related to mechanical
design, product development and manufacturing
technologies.
Michael Guinchard (michael.guinchard@cern.ch) has been
Leader of the Mechanical Measurements Lab of EN-MME at
CERN since 2005. He earned a degree in physical measurements
in 1996 from the Strasbourg University of Technology in
Strasbourg, France. He worked for General Motors in the Noise
and Vibration Laboratory of the European Technical Centre
for six years and followed in parallel engineering courses in
instrumentation and measurements with the National Conservatory
of Arts and Crafts in Paris, France.
IEEE Instrumentation & Measurement Magazine
December 2021
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Instrumentation & Measurement Magazine 24-9

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