Speaker
Dr
reza valizadeh
(ASTeC, STFC)
Description
Nb3Sn alloy is a type II superconductor with maximum Tc of 18 K and predicted superheating field of 400 mT and potentially may offer improvements in both cryogenic efficiency and maximum accelerating field. Hence, Nb3Sn thin film can be an alternative superconducting coating either as a single or multilayer for SRF cavity production.
Nb3Sn has been deposited from stoichiometric alloy target on copper and single crystal sapphire substrate at room and elevated temperature and with and without Nb buffer layer. Analysis showed that the composition in both room and elevated temperature was within the desired stoichiometry of 24–25 at%, however the superconducting properties was only observed for elevated temperature deposition or post annealing at 650 C. The critical temperature was determined to be 16.8 K.
Primary author
Dr
reza valizadeh
(ASTeC, STFC)
Co-authors
Dr
Oleg Malyshev
(STFC Daresbury Laboratory)
Mr
adrian hannah
(STFC ASTeC)
