During the last week of June the Cockcroft Institute and ASTeC hosted the International Workshop on Higher-Order-Mode Diagnostics and Suppression in Superconducting Cavities (HOMSC12). Beam-excited higher order modes (HOMs), if left unchecked, can appreciably dilute the beam quality, and in the worst case scenario can give rise to a beam break up instability.
This workshop brought together researchers from Europe, Asian and the USA –all with the common purpose to study HOM suppression in superconducting cavities in fields ranging from energy recovery linacs, light sources and linear collider applications. The local oragnising committee was chaired by S. Buckley (ASTeC) and the scientific programme committee by R.M. Jones (Cockcroft Institute/University of Manchester).
Both invited plenary and contributed sessions were included in the 2.5 day meeting. This workshop encompassed issues in both electron and proton linacs, TESLA style cavities, third harmonic cavities, and TEM crabbing and other cavity designs.
Highlights included a plenary talk by P. McIntosh on SRF Cryomodule Development for ERL Applications, V.P. Yakovlev on Higher Order Modes in the Project-X, and J. Delayen with HOM Modes in Parallel-bar Deflecting /Crabbing Cavities.
In addition, tutorials were presented each day by I. Nesmiyan, J. Smith and I.R.R. Shinton. A prize was presented to the best student poster and to the runner up. Selected papers from this workshop will be published in a special issue of Nuclear Instruments and Methods in Physics Research Section A.