Title :
Measured strain in Nb3Sn coils during excitation and quench
Author :
Caspi, S. ; Bartlett, S.E. ; Dietderich, D.R. ; Ferracin, P. ; Gourlay, S.A. ; Hannaford, C.R. ; Hafalia, A.R. ; Lietzke, A.F. ; Mattafirri, S. ; Nyman, M. ; Sabbi, G.
Author_Institution :
Lawrence Berkeley Nat. Lab., CA, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
The strain in a high field Nb3Sn coil was measured during magnet assembly, cool-down, excitation and spot heater quenches. Strain was measured with a full bridge strain gauge mounted directly over the turns and impregnated with the coil. Two such coils were placed in a "common coil" fashion capable of reaching 11 T at 4.2 K. The measured steady state strain in the coil is compared with results obtained using the FEM code ANSYS. During quenches, the transient strain (due to temperature rise) was also measured and compared with the calculated mechanical time response to a quench.
Keywords :
finite element analysis; niobium alloys; quenching (thermal); strain measurement; superconducting coils; tin alloys; 11 T; 4.2 K; ANSYS FEM code; Nb3Sn; Nb3Sn coil; cool down; excitation; magnet assembly; quench; strain gauge; strain measurement; superconducting coil; time response; Assembly; Bridges; Coils; Magnetic field induced strain; Magnetic field measurement; Niobium; Steady-state; Strain measurement; Temperature; Tin; Quench; strain gauge; superconducting;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849128
