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@InProceedings{porter:napac2019-moybb3,
author = {R.D. Porter and H. Hu and M. Liepe and N.A. Stilin and Z. Sun and M.J. Tao},
title = {{Progress in Nb3Sn SRF Cavities at Cornell University}},
booktitle = {Proc. NAPAC'19},
pages = {37--40},
paper = {MOYBB3},
language = {english},
keywords = {cavity, SRF, accelerating-gradient, site, superconductivity},
venue = {Lansing, MI, USA},
series = {North American Particle Accelerator Conference},
number = {4},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2019},
issn = {2673-7000},
isbn = {978-3-95450-223-3},
doi = {10.18429/JACoW-NAPAC2019-MOYBB3},
url = {http://jacow.org/napac2019/papers/moybb3.pdf},
note = {https://doi.org/10.18429/JACoW-NAPAC2019-MOYBB3},
abstract = {Niobium-3 Tin (NbSn) is the most promising alternative material for next-generation SRF cavities. The material can obtain high quality factors (> 10¹⁰) at 4.2 K and could theoretically support ~ 96 MV/m operation of a TESLA elliptical style cavity. Current Nb₃Sn cavities made at Cornell University achieve high quality factors but are limited to about 17 MV/m in CW operation due to the presence of a surface defect. Here we examine recent results on studying the quench mechanism and propose that surface roughness is a major limiter for accelerating gradients. Furthermore, we discuss recent work on reducing the surface roughness including chemical polishing, modification of material growth, and tin electroplating.},
}