Speaker
Description
The high-energy booster is the last part of the accelerator complex before the FCC-ee collider.
The booster has to handle several challenges common to the FCC-ee collider like fitting the 100-km-long tunnel, reaching low equilibrium emittances, or longitudinal stability because of a very small momentum compaction.
Nevertheless, the booster has also specific challenges. At injection, magnetic field in the dipoles is very low; which brings some issues of reproducibility of the field and large random errors. Moreover, the damping time is longer and the lattice needs some undulators for instance to speed up the damping time by 2 orders of magnitude. At larger energies, the beam energy varies along the arc because of synchrotron radiation. Contrary to the collider, it is not possible to use tapering, which makes orbit correction an issue while acceleration.
We show the status and performances of the lattice, including a new tool to generate the optics in agreement with the tunnel geometry.
