17–22 May 2026
C.I.D
Europe/Zurich timezone

Updates on impedance studies for the FCCee High Energy Booster

MOP1072
18 May 2026, 16:00
2h
C.I.D

C.I.D

Deauville, France
Poster Presentation MC1.A02: Lepton Circular Colliders Poster session

Speaker

Keon Hee Kim (Grand Accélérateur National d'Ions Lourds)

Description

Following the Future Circular Collider (FCC) Feasibility Study completion, the impedance model for the FCC-ee High-Energy Booster (HEB) has been significantly expanded beyond the initial copper vacuum pipe resistive wall analysis. This paper presents a comprehensive impedance and wake budget incorporating RF cavities, bellows, and beam position monitors, evaluated through 3D electromagnetic simulations and analytical methods.

The updated model provides the basis for future beam dynamics studies, including transverse coupled bunch instability analyses and single bunch tracking simulations. The present work focuses on the construction and comparison of the main impedance and wake contributions, identifying the dominant sources and the components requiring further investigation. These results will be used to refine the HEB collective effects studies and to support future assessments of instability margins and mitigation requirements.

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Authors

Dr Adnan Ghribi (Grand Accélérateur Nat. d'Ions Lourds) Keon Hee Kim (Grand Accélérateur National d'Ions Lourds)

Co-authors

Dr Ahmad Mashal (Institute for Research in Fundamental Sciences) Antoine Chance (Commissariat à l'Énergie Atomique et aux Énergies Alternatives) Barbara Dalena (Commissariat à l'Énergie Atomique et aux Énergies Alternatives) Carlo Zannini (European Organization for Nuclear Research) Chiara Antuono (European Organization for Nuclear Research) Dora Gibellieri (European Organization for Nuclear Research) Frank Zimmermann (European Organization for Nuclear Research) Mauro Migliorati (Istituto Nazionale di Fisica Nucleare) Dr Mikhail Zobov (Istituto Nazionale di Fisica Nucleare) Quentin Bruant (Commissariat à l'Énergie Atomique et aux Énergies Alternatives) Mr Santiago Martinez Saenz (Grand Accélérateur National d'Ions Lourds)

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