CLASSE SEMINAR
August 2, 2018
1:00 PM
3rd Floor Wilson Commons Recent Advances in Measurement and Modeling of Electon Cloud Buildup at CESR and Predictions for CHESS-U
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Jim Crittenden and Stephen Poprocki Cornell University
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Abstract: The CESRTA program obtained ever-improving measurements of a variety of sources of emittance growth limiting the performance of CESR and future low-emittance rings such as the damping rings for linear colliders as sources of high-brightness X-ray beams from 2009 through 2017. The past year has witnessed important advances in the mature analysis of the data sets, as well as major progress in the sophistication of our understanding of the underlying physics by means of numerical modeling of electron cloud buildup. The latter now includes the first detailed calculations of electron production mechanisms sourced by interactions of synchrotron-radiation photons in the CESR vacuum chamber walls.
This work is attracting the attention of accelerator physicists at a number of facilities, particularly at CERN in Switzerland and KEK in Japan, where electron cloud effects are important contributors to performance limitations at the LHC and SuperKEKB storage rings. We describe this recent work, and include quantitative assessments of potential consequences for the CHESS-U upgrade to be commissioned later this year.
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For more information please go to www.chess.cornell.edu or call 255-7163.
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Cornell Laboratory for Accelerator-based Sciences and Education is primarily supported by the National Science Foundation.
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