Test Results of the MQYYM: A 90 Mm NbTi Quadrupole Magnet Option for HL-LHC
Résumé
For the HL-LHC project, a 90 mm NbTi cos(2θ) double aperture quadrupole magnet with an operating gradient of 120 T/m at 1.9 K has been designed as an option to replace the 70 mm aperture LHC quadrupole MQY. CEA in collaboration with CERN designed and manufactured a single aperture short model magnet with a magnetic length of 1.215 m at 1.9 K called MQYYM. The MQYYM cold test occurred at CEA at 4.2 K in a vertical cryogenic station. During the power test, the operating gradient at 1.9 K has been reached after two training quenches. All along the test, magnetic and mechanical measurements were done using respectively a rotating probe and strain gauges. This paper describes the performance of the MQYYM at 4.2 K and gives an analysis of the data acquired during the test, including training behavior, quench detection, protection and field quality measurements.
Mots clés
accelerator, magnet
magnet, superconductivity
niobium, alloy
luminosity, upgrade
accelerator, superconductivity
titanium, alloy
quadrupole lens
quenching
cryogenics
temperature
quality
CERN Lab
rotation
magnetic field
performance
tunneling
Superconducting magnets
Magnetic field measurement
Training
Apertures
Heating systems
Coils
Magnetic tunneling
accelerator magnets
niobium alloys
superconducting coils
superconducting magnets
titanium alloys
NbTi quadrupole magnet option
HL-LHC project
double aperture quadrupole magnet
operating gradient
CEA
CERN
single aperture short model magnet
magnetic length
MQYYM cold test
vertical cryogenic station
mechanical measurements
LHC quadrupole MQY
strain gauges
rotating probe
quench detection
field quality measurements
size 1.215 m
temperature 1.9 K
temperature 4.2 K
size 90.0 Mm
size 70.0 mm
LHC luminosity upgrade
NbTi
quadrupole
superconducting accelerator magnet
beam, width
CERN LHC Coll, upgrade
coil, superconductivity