• N. Delerue, R. Bartolini, K.J. Peach, A. Reichold, R. Senanayake
  JAI, Oxford
• S.I. Bajlekov, L.S. Caballero-Bendixsen, T. Ibbotson
  University of Oxford, Clarendon Laboratory, Oxford
• N. Bourgeois, P.A. Walker
  University of Oxford, Oxford
• B. Buonomo, G. Mazzitelli
  INFN/LNF, Frascati (Roma)
• G. Doucas, S.M. Hooker, P. Lau, D. Urner
  OXFORDphysics, Oxford, Oxon
• C.A. Thomas
  Diamond, Oxfordshire

Funding: John Adams Institute, University of Oxford John Fell Fund, University of Oxford

We describe a method that uses a modified pepper-pot design to measure in a single shot the emittance of electron beams with energies above 100 MeV. Our setup consists of several thin layers of tantalum with spacers in between to leave slits through which the electron beam can be sampled. We report on a measurement done using this method at the DAΦNE BTF with a 508 MeV electron beam.

• A.S. Aryshev, V. Karataev
  JAI, Egham, Surrey
• G.A. Blair, S.T. Boogert, G.E. Boorman, A. Bosco, L.C. Deacon
  Royal Holloway, University of London, Surrey
• L. Corner, N. Delerue, B. Foster, F. Gannaway, D.F. Howell, L.J. Nevay, M. Newman, R. Senanayake, R. Walczak
  OXFORDphysics, Oxford, Oxon
• H. Hayano, N. Terunuma, J. Urakawa
  KEK, Ibaraki

Funding: STFC LC-ABD Collaboration, Royal Society, Daiwa Foundation, Commission of European Communities under the 6th Framework Programme Structuring the European Research Area, contract number RIDS-011899

The KEK Accelerator Test Facility (ATF) extraction line laser-wire system has been upgraded, enabling the measurement of micron scale transverse size electron beams. The most recent measurements using the upgraded system are presented, including the major hardware upgrades to the laser transport, the laser beam diagnostics line, and the mechanical control systems.