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Persistent URL http://purl.org/net/epubs/work/43969
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Record Id 43969
Title Surface roughness wakefields for the ILC positron undulator beam tube
Abstract A simple, and probably pessimistic, estimation of the surface roughness specification for the undulator beam tube can be made using an inductive impedance model. The results show that in the worst possible case a surface roughness of ~300 nm would only increase the energy spread by factor of 10%. This specification, although quite stringent, can be comfortably met by specialist vessel manufacturers. And, due to currently unknown factors such as the exact bunch charge distribution and to induce the lowest possible energy spread in the bunch the smoothest commercially available beam tube should be used, which has a roughness less than 200 nm.
Organisation CCLRC , ASTeC , ASTeC-MaRS , CI
Keywords Physics
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Language English (EN)
Type Details URI(s) Local file(s) Year
Report CI Preprints 06-10. 2006. Cockcroft-06-10.pdf 2006