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Phys Rev Lett. 2012 Nov 9;109(19):194801. Epub 2012 Nov 8.

Observation of picometer vertical emittance with a vertical undulator.

Author information

  • 1School of Physics, The University of Melbourne, Melbourne VIC 3010, Australia. k.wootton@student.unimelb.edu.au

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.

PMID:
23215388
[PubMed - indexed for MEDLINE]
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