Speaker
Dr
Alex Gurevich
(Old Dominion University )
Description
Low BCS surface resistance and large superheating field make Nb3Sn a very attractive material for low-field SRF applications. At the same time, the performance of Nb3Sn at high RF fields can be limited by current-blocking grain boundaries, small lower critical magnetic field, poor thermal conductivity and high resistivity, which make Nb3Sn prone to premature penetration of vortices and overheating effects. In this talk I discuss possible ways by which the performance-limiting mechanisms in Nb3Sn could be mitigated by surface nano-structuring and improving current transparency of grain boundaries. I will also discuss nonlinear SRF losses caused by trapped vortices.
Primary author
Dr
Alex Gurevich
(Old Dominion University )
