Title |
FCC-ee e⁺e⁻ Injection and Booster rRng |
Authors |
- R.L. Ramjiawan, M.J. Barnes, W. Bartmann, J.C.C.M. Borburgh, Y. Dutheil, M. Hofer
CERN, Meyrin, Switzerland
- A. Chancé
CEA, Gif-sur-Yvette, France
- B. Dalena
CEA-IRFU, Gif-sur-Yvette, France
- E.R. Howling
Royal Holloway, University of London, Surrey, United Kingdom
- P.J. Hunchak
University of Saskatchewan, Saskatoon, Canada
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Abstract |
The Future Circular electron-positron Collider (FCC-ee) is a proposal for a 91.17 km collider, which would operate in four modes with energies ranging from 45.6 GeV (Z-pole) to 182.5 GeV (ttbar-production). At high energies the beam lifetime could be as low as 6 minutes, requiring the beam to be continuously topped up to reach a high integrated luminosity. This top-up injection would use a separate booster ring in the same tunnel as the collider, which would accelerate the beams to the collider energy. The booster ring should achieve a lower equilibrium emittance than the collider, despite challenges such as a long damping time and no magnet-strength tapering to compensate for the impact of synchrotron radiation. For top-up injection into the collider, we consider two strategies: conventional bump injection, employing a closed orbit bump, and injection using a multipole kicker magnet. On-axis and off-axis sub-schemes will be studied for both. We compare these injection strategies on aspects including spatial constraints, machine protection, perturbation to the stored beam and hardware parameters.
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Funding |
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 951754. |
Paper |
download THXAT0104.PDF [1.917 MB / 9 pages] |
Slides |
download THXAT0104_TALK.PDF [3.137 MB] |
Cite |
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Conference |
eeFACT2022 |
Series |
ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e- Colliders (65th) |
Location |
Frascati, Italy |
Date |
12-16 September 2022 |
Publisher |
JACoW Publishing, Geneva, Switzerland |
Editorial Board |
Maria Enrica Biagini (INFN-LNF, Frascati, Italy); Jan Chrin (PSI, Villigen, Switzerland); Manuela Giabbai (INFN-LNF, Frascati, Italy); Massimiliano Iungo (INFN-LNF, Frascati, Italy); Volker R.W. Schaa (GSI, Darmstadt, Germany) |
Online ISBN |
978-3-95450-236-3 |
Online ISSN |
2673-7027 |
Received |
27 October 2022 |
Revised |
03 February 2023 |
Accepted |
07 February 2023 |
Issue Date |
12 February 2023 |
DOI |
doi:10.18429/JACoW-eeFACT2022-THXAT0104 |
Pages |
227-235 |
Copyright |
Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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