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Persistent URL http://purl.org/net/epubs/work/43973
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Record Id 43973
Title Longitudinal resistive wall wakefields for the ILC positron undulator vessel
Abstract The DC, AC and anomalous skin effect longitudinal resistive wall wakefields of a round vessel have been computed for the ILC positron source undulator vessel. They have been calculated as a function of vessel radius for copper, aluminium, gold, iron and stainless steel materials and for the minimum, nominal and maximum ILC parameters. Gaussian, trapezium and 'Linac Coherent Light Source type' charge distributions have been modelled as examples. To assess the effects of cryogenic temperatures (the undulator is a superconducting helical device) the wakes have been calculated at 273K and 77K. For an undulator aperture of 5.6mm the increase in energy spread is 2% for gold at 273K with a Gaussian bunch profile and the minimum ILC parameters. The induced energy spread decreases with temperature and at 77K is 1.3% for gold and a Gaussian bunch.
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 06-11. 2006. Cockcroft-06-11.pdf 2006