Physics – Accelerator Physics
Scientific paper
2009-10-07
Physics
Accelerator Physics
Proceedings of 14th International Conference on RF Superconductivity (SRF 2009), 2009, Berlin, Germany
Scientific paper
Third harmonic cavities have been designed and fabricated by FNAL to be used at the FLASH/XFEL facility at DESY to minimise the energy spread along the bunches. Modes in these cavities are analysed and the sensitivity to frequency errors are assessed. A circuit model is employed to model the monopole bands. The monopole circuit model is enhanced to include successive cell coupling, in addition to the usual nearest neighbour coupling. A mode matching code is used to facilitate rapid simulations, incorporating fabrication errors. Curves surfaces are approximated by a series of abrupt transitions and the validity of this approach is examined
Jones Michael R.
Shinton I. R. R.
Szczesny Bartosz
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