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IPAC'17 Preview - APT Seminar Series

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Fernanda G Garcia
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Fernanda G Garcia
Document Created:
27 Apr 2017, 12:14
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27 Apr 2017, 13:54
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27 Apr 2017, 13:54
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27 Apr 2017, 13:22
27 Apr 2017, 12:14
Speaker 1: Martina Martinello , Fermilab
Title 1: Plasma Processing R&D for LCLS-II Cavities

A1: Field emission is one the major limitations to the maximum usable accelerating gradient of SRF cavities in cryomodules. Taking advantage of the plasma chemistry, field emitting particles may be preferentially attacked with the purpose of modifying the work function, smoothing the particle shape or even removing completely the field emitter. Relying on this idea, a collaboration between FNAL, SLAC and ORNL was established with the purpose of building a plasma processing system as a tool capable to minimize and overcome the problem of field emission in LCLS-II cryomodules. The plasma processing system is inspired to the one already built at the Spallation Neutron Source (SNS), that is capable to process in-situ cavities from hydrocarbon contaminants, by means of a neon-oxygen reactive plasma mixture. Here we show an innovative RF design that has been optimized in order to ignite the plasma using a mixture of fundamental pass-band and high order modes.

Speaker 2: Diktys Stratakis , Fermilab
Title 2: Performance Analysis of the Fermilab Muon Campus Accelerator

A2: In the coming years, Fermilab will host a world class experiment dedicated to the search for signals of new physics. In particular, the Muon g-2 Experiment will determine with unprecedented precision the anomalous magnetic moment of the muon, offering an important test of the Standard Model. In this study, we describe the accelerator facility that will deliver a muon beam to the experiment. First, we present the lattice design that will allow efficient capture, transport and delivery of polarized muon beams. Then, we numerically examine its performance by simulating the pion production in the target, the muon collection by the downstream beamline optics as well as the transport of muon polarization. Finally, we establish the conditions required for the safe removal of unwanted secondary particles and thus minimizing contamination of the final beam.

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