[Seminars] Accelerator Science Seminar Today (ERC401)

Holly Jaffey holly2 at uchicago.edu
Mon Mar 6 11:51:13 CST 2017


Monday March 6, 2017
ERC 401

Speaker: Sam Posen (Fermilab)

Title:   State-of-the-Art Techniques to Maximize Quality Factor and Accelerating Field in Superconducting RF Cavities

Abstract: One of the most widely applied methods for accelerating charged particle beams in accelerators is via large electric fields generated using superconducting radiofrequency (SRF) cavities. These high-Q0 electromagnetic resonators provide high duty factor operation and tens-of-MV/m accelerating gradients in applications that range from colliders to X-ray and neutron sources. New treatments that enhance performance can allow accelerator builders to raise the performance specifications for SRF cavities; this improves the feasibility of building new accelerators with large-scale SRF infrastructure that provide unprecedented reach into unexplored scientific frontiers. This seminar overviews recent R&D advances and presents several novel topics currently under investigation to improve the state-of-the-art performance of SRF cavities. The treatments discussed include nitrogen impurity doping, Nb3Sn coating, plasma cleaning, and high temperature treatment to improve flux expulsion. We conclude with outlook for the future of SRF cavity development.
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