Speaker
Description
The UK XFEL (United Kingdom X-ray Free Electron Laser) is a proposed accelerator facility that will use predominantly superconducting RF structures to accelerate and manipulate the transiting electron bunches. Deviations from design longitudinal length of these Niobium RF cavities, or cells within, caused by errors in manufacturing, fabrication tolerances, assembly and installation can lead to certain modes becoming frequency degenerate. This gives rise to mode mixing, whereby the component modes combine to form additive and subtractive field distributions. Here we look at the mixing of transverse magnetic (TM) modes and locate problematic combinations where field strength enhancements can lead to increased on-axis loss factors and dipole kick factors, both of which can have adverse effects on the beam emittance and energy.
| Paper status | Resubmitted proceeding files received and assigned to an editor. Rejected. |
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