CERN Accelerating science

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1.
Effect of Strand Damage in Nb3Sn Rutherford Cables on the Quench Propagation in Accelerator Magnets / Keijzer, Ruben (CERN ; Twente U., Enschede) ; Willering, Gerard (CERN) ; Dhalle, Marc (Twente U., Enschede) ; ten Kate, Herman (Twente U., Enschede)
Accelerator magnets employing Nb$_3$Sn Rutherford cables are more susceptible to conductor degradation than Nb-Ti magnets. Recent measurements on a Nb$_3$Sn accelerator magnet have revealed unexpected behaviour such as decaying voltages at constant current plateaus of V-I measurements, inverse ramp rate and temperature dependence of quench currents, and anomalous quench propagation measured by so-called quench antennas. [...]
2023 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 33 (2023) 1-5 Fulltext: PDF;
2.
Modelling V-I Measurements of Nb$_3$Sn Accelerator Magnets With Conductor Degradation / Keijzer, Ruben (CERN ; Twente U., Enschede) ; Succi, Giovanni (CERN) ; Willering, Gerard (CERN) ; Bordini, Bernardo (CERN) ; Bottura, Luca (CERN) ; Mangiarotti, Franco J (CERN) ; Dhallé, Marc (Twente U., Enschede) ; Kate, Herman H J Ten (Twente U., Enschede)
In the framework of the High-Luminosity Large Hadron Collider (HL-LHC) project, 11 T dipole and MQXF quadrupole magnets employing Nb$_3$Sn technology have been tested in short and long test configurations. Nb$_3$Sn magnets are more sensitive than Nb-Ti magnets to a potential degradation of their conductors during production, testing, and cycling operation. At CERN, new diagnostic tools and measurement procedures have been developed to investigate, in detail, the performance of Nb$_3$Sn accelerator type magnets. [...]
2022 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 32 (2022) 4001105
In : 27th International Conference on Magnet Technology (MT-27), Fukuoka, Japan, 15 - 19 Nov 2021, pp.4001105

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1 Keijzer, R
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