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FCC-ee top-up injection
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FCC-ee top-up injection
Present: Y. Dutheil, G. Gonen, M.A. Jebramcik, J. Keintzel, A. Lechner, T. Mori, G. Nigrelli, G. Roy, S. Yue
- Injection efficiency study, G. Nigrelli
- Both dispersion and beta functions are strongly influenced by energy offset
- Beyond red line it requires a recursive approach, presents issues with V25.2 beyond 0.93%
- As a workaround presently using only twiss 4d up to 0.93% and obtain the longitudinal distribution from the booster
- It is important to use the same version when presenting the results, agreement to all focus on the GHC25.3 for now
- Current injection status and long term objectives, S. Yue
- Injection settings to be fixed, to be converged with Giulia's presentation and moved to Giulia's talk
- Need to iterate on the MIK concept and its representation
- Injection efficiency study with SAD and Xsuite, T. Mori
- Results with Xsuite and SAD for lattices 25.3 and 25.1
- Discrepancies remain with 25.3 between Xsuite and SAD, but are closer than with 25.1
- Optimisation of the longitudinal position
- Presentations at a future optics meeting
- Agreement to contribute with 3 short talks by Sen, Giulia and Takashi followed by discussion
- Due to short slots, some slides may be moved to back-up
- Address the discussion from today, in particular
- Injected beam position and optics
- Agreement between Giulia's and Takashi's Xsuite simulations number
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