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FCC-ee Injector Design (CHART proposal) Coordination meeting 17
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Europe/Zurich
Paolo Craievich
Contact
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General information, topics for review during FCC Week 2024Speaker: Paolo Craievich
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Booster ring: parameter table and lower vertical emittanceSpeaker: Antoine Chance (CEA)
10:34:47 From Yann Dutheil to Everyone:
Great idea to overshoot the energy instead of waiting on the flat-top
10:44:37 From Yann Dutheil to Everyone:
I agree, we are keeping that option for the specs of extraction systems
10:52:47 From Yann Dutheil to Everyone:
I think we have that opportunity to inject any bunch/train structure in the collider as far as both booster and collider RF can cope. I'm not sure RF confirmed this yet. Someone from ring-RF could confirm ? - 3
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Transfer line from Injector to BR: energy spread and vacuum chamber apertureSpeakers: Wolfgang Bartmann (CERN), Yann Dutheil (CERN)
- Transfer line from the HE linac to the Booster is in the order of 10 km.
- Bends in H & V planes, with >90 degrees of bending in horizontal.
- Reasonable quadrupole strength imposes a FODO cell length of a few 10s of meters and dispersion 2-3 m.
- Present designs use ~1000 dipoles and ~400 quadrupoles.
- Dispersion in the line is also used for R56 control.
- Geometrical emittance is small -> minor contribution to the required transfer line aperture.
- Strong constraint on energy spread to limit the required aperture around 40mm.
- Request to limit relative energy spread provided by the HE linac dp/p <= 2.5E-3
- Transfer line from the HE linac to the Booster is in the order of 10 km.
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WP1 - e+/e- Injector LinacsSpeaker: Alexej Grudiev (CERN)
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WP3 - Positron source: FC vs SC solenoidsSpeaker: Iryna Chaikovska (CNRS/IJCLab)
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WP4 - Damping ring and transfer lines: working strategy and topic definitionSpeaker: Ozgur Etisken (Ankara University (TR))
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WP6 - P-cubed project at PSI: status and outlookSpeaker: Nicolas Vallis (PSI/EPFL)
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AOBSpeaker: Paolo Craievich
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