Observation of picometer vertical emittance with a vertical undulator

K. P. Wootton, M. J. Boland, R. Dowd, Y.- R. E. Tan, B.C.C. Cowie, Y. Papaphilippou, Geoff N. Taylor, R.P. Rassool

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Abstract

Using a vertical undulator, picometer vertical electron beam emittances have been observed at the Australian Synchrotron storage ring. An APPLE-II type undulator was phased to produce a horizontal magnetic field, which creates a synchrotron radiation field that is very sensitive to the vertical electron beam emittance. The measured ratios of undulator spectral peak heights are evaluated by fitting to simulations of the apparatus. With this apparatus immediately available at most existing electron and positron storage rings, we find this to be an appropriate and novel vertical emittance diagnostic.

Original languageEnglish
Article number194801
Number of pages4
JournalPhysical Review Letters
Volume109
Issue number19
DOIs
Publication statusPublished - 8 Nov 2012
Externally publishedYes

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