Speaker
Description
We present the impact of the main dipole field quality on the dynamic aperture (DA) and the emittance tuning of the High Energy Booster (HEB) of the leptonic version of the future circular colliders. Multipole field imperfections up to order six (normal: b2–b6; skew: a2–a6) are introduced into the main dipoles using measured values, interpolated at 8.8 mT (the HEB injection energy), and systematic errors of one unit.
The study evaluates the degradation of the total DA as a function of the energy offset, computed for several angles in the transverse plane (x–y).
The impact on the emittance achieved following optics correction and correctors strength is also evaluated.
Correction of linear chromaticity and Montague functions, together with second-order dispersion, are discussed.
Key results show that even small multipolar errors can significantly impact optics stability, and further iterations with magnet experts are required to define tolerances of field quality and correctors specifications.
The approach and scripts developed here (using the Xsuite modules) enable the rapid testing of various error configurations and can be adapted for future optimisation.
| In which format do you inted to submit your paper? | LaTeX |
|---|