Title :
Tests of a 70 mm aperture quadrupole for the LHC low-beta insertions
Author :
Lamm, M. ; Kirby, G. ; Ostojic, R. ; Rival, F. ; Rodriguez-Mateos, F. ; Siemko, A. ; Taylor, T.M. ; Walckier, L. ; Milward, S.R. ; Treadgold, J.R.
Author_Institution :
CERN, Geneva, Switzerland
fDate :
6/1/1999 12:00:00 AM
Abstract :
Three 70 mm aperture 1-meter superconducting quadrupole magnets for the LHC low-/spl beta/ insertions have been designed and built in collaboration between CERN and Oxford Instruments. These magnets feature a four layer coil wound from two 8.2 mm wide graded NbTi cables. In this paper, the authors present the results from the tests at 4.4 K and 1.9 K of the third quadrupole (Q3), with an emphasis on studies concerning quench protection. After a summary of Q3 training in three thermal cycles, quench velocities, peak temperatures in the two superconducting cables and the performance of the layer strip heaters are reported.
Keywords :
high-temperature superconductors; linear colliders; niobium compounds; superconducting cables; superconducting coils; superconducting magnets; titanium compounds; 1 m; 1.9 K; 4.4 K; 70 mm; 8.2 mm; CERN; LHC low-beta insertions; NbTi; NbTi cables; Oxford Instruments; Q3 training; aperture superconducting quadrupole magnets; construction; design; four layer coil; layer strip heaters; peak temperatures; performance testing; quench protection; quench velocities; superconducting cables; thermal cycles; third quadrupole; Apertures; Collaboration; Instruments; Large Hadron Collider; Superconducting cables; Superconducting coils; Superconducting epitaxial layers; Superconducting magnets; Testing; Wounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
