International Workshop on Higher Order Modes in Superconducting Cavities (HOMSC2025)

Dipole mode wakefields and beam dynamics tracking simulations for the UK XFEL main accelerating Linacs

6 Oct 2025, 12:30

30m

FLASH Seminar Room (bld. 28c)

Oral contribution HOM Damping Requirements for Future Facilities HOM Damping Requirements for Future Facilities

Speaker

Anthony Gilfellon (UKRI / STFC / ASTeC)

Description

The baseline design for the proposed UK XFEL (United Kingdom X-ray Free Electron Laser) facility includes main linear accelerating linacs, which are comprised of 600 9-cell TESLA style superconducting RF cavities, which will accelerate a 1 MHz repetition-rate irregularly spaced composite electron beam comprised of varying bunch charges up to an energies of 8 GeV. Here the TESLA cavities are simulated and the dipole modes excited by the beam are characterised in order to calculate the transverse long-range wakes. We track the particles through 1 km under the influence of these wakefields using the PLACET code and evaluate the transverse emittance dilution of the electron beam. Mitigation strategies are also explored to enhance the beam quality.