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, G. N. Taylor, and R. P. Rassool
Phys. Rev. Lett. 109, 194801 – Published 8 November 2012

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.

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  • Received 11 July 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.194801

© 2012 American Physical Society

Authors & Affiliations

K. P. Wootton1,*, M. J. Boland1,2, R. Dowd2, Y.-R. E. Tan2, B. C. C. Cowie2, Y. Papaphilippou3, G. N. Taylor1, and R. P. Rassool1

  • 1School of Physics, The University of Melbourne, Melbourne VIC 3010, Australia
  • 2Australian Synchrotron, 800 Blackburn Road, Clayton VIC 3168, Australia
  • 3European Organization for Nuclear Research (CERN), BE Department, 1211 Geneva 23, Switzerland

  • *k.wootton@student.unimelb.edu.au

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Vol. 109, Iss. 19 — 9 November 2012

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