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@inproceedings{ramjiawan:eefact2022-thxat0104, author = {R.L. Ramjiawan and M.J. Barnes and W. Bartmann and J.C.C.M. Borburgh and A. Chancé and B. Dalena and Y. Dutheil and M. Hofer and E.R. Howling and P.J. Hunchak}, % author = {R.L. Ramjiawan and M.J. Barnes and W. Bartmann and J.C.C.M. Borburgh and A. Chancé and B. Dalena and others}, % author = {R.L. Ramjiawan and others}, title = {{FCC-ee e⁺e⁻ Injection and Booster rRng}}, % booktitle = {Proc. eeFACT'22}, booktitle = {Proc. 65th ICFA Adv. Beam Dyn. Workshop High Luminosity Circular e+e- Colliders (eeFACT'22)}, pages = {227--235}, eid = {THXAT0104}, language = {english}, keywords = {injection, booster, septum, kicker, collider}, venue = {Frascati, Italy}, series = {ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e+e- Colliders}, number = {65}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {02}, year = {2022}, issn = {2673-7027}, isbn = {978-3-95450-236-3}, doi = {10.18429/JACoW-eeFACT2022-THXAT0104}, url = {https://jacow.org/eefact2022/papers/thxat0104.pdf}, 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.}}, }