Porter, R.D. Arias, T. Cueva, P. Hall, D.L. Liepe, M. Maniscalco, J.T. Muller, D.A. Sitaraman, N. JACoW Publishing Geneva, Switzerland 2226-0366 978-3-95450-194-6 10.18429/JACoW-LINAC2018-TUPO055 English 462-465 TUPO055 cavity operation SRF linac site Contribution to a conference proceedings 2019 2019-01 https://doi.org/10.18429/JACoW-LINAC2018-TUPO055 http://jacow.org/linac2018/papers/tupo055.pdf Niobium-3 Tin (Nb3Sn) is a very promising alternative material for SRF accelerator cavities. The material can achieve higher quality factors, higher temperature operation and potentially higher accelerating gradients (~ 96 MV/m) compared to conventional niobium. This material is formed by vaporizing Sn in a high temperature vacuum furnace and letting the Sn absorb into a Nb substrate to form a 2-3 um Nb3Sn layer. Current Nb3Sn cavities produced at Cornell achieve Q ~ 10¹⁰ at 4.2 K and 17 MV/m. Here we present a summary of the current performance of Nb₃Sn cavities at Cornell and recent progress in improving the accelerating gradient.