Conveners
FCC-ee injector: Overview
- Mark James Boland (University of Saskatchewan (CA))
FCC-ee injector: Linac and Damping Ring
- John Theodore Seeman (SLAC National Accelerator Laboratory)
FCC-ee injector: Booster and transfer lines
- Jorg Wenninger (CERN)
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Paolo Craievich21/05/2025, 08:30FCC-ee injector(a) Talk abstract only
The FCC-ee project aims to achieve unprecedented luminosities over a broad energy range, requiring a highly efficient and robust injector complex. This talk will provide an overview of the FCC-ee injector system, highlighting recent updates from the newly published Feasibility Study Report and key challenges in delivering high-charge, high-quality electron and positron beams. I will summarize...
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Hannes Bartosik (CERN)21/05/2025, 09:00FCC-ee injector(a) Talk abstract only
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Dr Iryna Chaikovska (CNRS/IJCLab)21/05/2025, 09:15FCC-ee injector(a) Talk abstract only
The high-luminosity circular collider FCC-ee will need a low-emittance positron beam with high enough intensity to shorten the injection time. In particular, operation at the Z-pole demands a positron bunch intensity of $2.14\cdot10^{10}$ particles at injection into the collider rings. The baseline design for positron production relies on a conventional source, where a 2.86 GeV electron beam...
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Ramiro Francisco Mena Andrade21/05/2025, 09:30FCC-ee injector(a) Talk abstract only
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Eduardo Granados (CERN)21/05/2025, 09:45FCC-ee injector(a) Talk abstract only
The FCC-ee injector requires a flexible and reliable high-brightness photoinjector capable of delivering on-demand electron bunch charge. This contribution presents several concepts currently under study for both the laser and the photocathode material โranging from high-QE semiconductors to robust metallic optionsโ suitable for reliably producing 7 nC electron bunches. We also explore...
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Antonio De Santis21/05/2025, 10:30FCC-ee injector(a) Talk abstract only
The new optimised FCC-ee injector layout imposed a review of the intrinsic structure of damping ring (DR) Transfer Lines (TLs). The presence of two independent linacs for electron and positron beams, and the elimination of the common linac, naturally led to increased DR energy which, to avoid spin resonances, was set at the value of 2.86 GeV.
The main concept driving the DR and TLs design...
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Shalva Bilanishvili21/05/2025, 10:50FCC-ee injector(a) Talk abstract only
The beam dynamics in the FCC-ee Damping ring can be affected by the vacuum chamber
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wakefields (impedances) resulting in potentially harmful effects and beam instabilities.
In order to diminish their impact, measures for the impedance reduction should be
considered already at the design stage. In this talk we discuss possible design
solutions of the key vacuum chamber components and... -
Alexej Grudiev (CERN)21/05/2025, 11:05FCC-ee injector(a) Talk abstract only
The design of the FCC-ee injector linacs for the FCC feasibility study will be briefly summarized including electron and HE-linacs at 2.8 GHz and positron linac at 2 GHz. Then possible design choices and the RF frequency choices in the linacs for the TDR phase will be discussed towards using the standard European S-band RF frequency of 3 GHz.
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Simona Bettoni (Paul Scherrer Institut)21/05/2025, 11:25FCC-ee injector(a) Talk abstract only
The FCC-ee injector complex aims to deliver tunable, high-charge electrons and positron bunches for injection into the booster ring first and the final collider ring. The injector complex includes multiple linacs that sequentially boost the energy of the bunches to the booster injection energy of 20 GeV. This work addresses the significant challenges posed by the required beam parameters. We...
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Andrea Latina (CERN)21/05/2025, 11:45FCC-ee injector(a) Talk abstract only
The FCC-ee injector complex requires high-charge, high-brightness, low-energy-spread electron and positron beams, posing stringent demands on beam dynamics modeling and accelerator design tools. RF-Track is a parallelized particle tracking code that has been developed at CERN and applied to support the design of the FCC-ee injector linacs and positron source. In this talk, I will present...
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Antoine Chance (CEA Irfu)21/05/2025, 13:30FCC-ee injector(a) Talk abstract only
During this presentation, we will give an overview of the main features of the FCC-ee booster This presentation will also resume the main changes in the parameter tables, optics, tuning, and booster operation.
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Adnan Ghribi21/05/2025, 13:50FCC-ee injector(a) Talk abstract only
Collective effects are key to defining the design constraints and performance limits of the FCC-ee High-Energy Booster, particularly at injection energy and in Z-pole operation. Building on previous studies, this contribution presents updated results incorporating the latest lattice design and operational parameters. It includes an improved analysis of transverse jitter at injection and...
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Quentin Bruant (CEA/IRFU)21/05/2025, 14:10FCC-ee injector(a) Talk abstract only
Previous studies for the FCCee have highlighted the need to define tolerances on magnet imperfections and develop correction strategies. This is also crucial for ensuring the performance of one of the main elements in the acceleration chain: the High Energy Booster (HEB) ring.
Go to contribution pageThe efficiency and overall performance of the correction strategy, as well as the magnet field quality and... -
Sen Yue (CERN)21/05/2025, 14:25FCC-ee injector(a) Talk abstract only
The FCCee complex will produce and transport the lepton beams to the collider ring via a serious of beam transfer systems. From the damping ring to the top-up injection in the collider ring, beam injection and extraction systems are required to ensure efficient beam transfer. Each system has specific requirements, determined by the beam energy, required deflection, available space and so on....
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Duan,Zhe duanz21/05/2025, 14:40FCC-ee injector(a) Talk abstract only
The High Energy Photon Source (HEPS) is a fourth-generation synchrotron light source with a beam energy of 6 GeV and a circumference of 1.3km, currently under commissioning near Beijing, China. To achieve an ultra-low emittance of 35pm, the HEPS storage ring employs swap-out injection, significantly reducing the dynamic aperture requirements. However, the implementation of this scheme faces...
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