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FCC-FS EPOL group meeting 38

Europe/Zurich
Description

The FCC technical and financial feasibility study comprises a work package (EPOL) on precision determination of the centre of mass energy at FCCee. using resonant depolarisation of the beams, in conjunction with precise measurement of the energy spread and other parameters using physics events in the detectors, and other beam diagnostics in particular to control the collision parameters. Specific equipment involves polarimeters for both beams, polarisation wigglers, and depolarising RF kickers. The possible mono-chromatization of the beams in view of a measurement of the e+ e- —> H (125) process will also be studied and special requirements investigated. 

Short group meetings are foreseen at 15:00 on Friday.

K. Hock presents how spin tracking has been implemented in Xsuite and benchmarked with zgoubi. 


G. Iadarola presents spin implementation on Xsuite. D. Barber comments that the ISF is the continuous solution of the T-BMT equation. He notes that paper by Montague should be read with care since it is not considering periodic solution beyond page 27. 

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