Laserwire at the Accelerator Test Facility 2 with Sub-Micrometre Resolution

L. J. Nevay, S. T. Boogert, P. Karataev, K. Kruchinin, L. Corner, D. F. Howell, R. Walczak, A. Aryshev, J. Urakawa, N. Terunuma

Research output: Contribution to journalArticle


A laserwire transverse electron beam size measurement system has been developed and operated at the Accelerator Test Facility 2 (ATF2) at KEK. Special electron beam optics were developed to create an approximately 1 x 100 {\mu}m (vertical x horizontal) electron beam at the laserwire location, which was profiled using a 150 mJ, 71 ps laser pulse with a wavelength of 532 nm. The precise characterisation of the laser propagation allows the non-Gaussian transverse profiles of the electron beam caused by the laser divergence to be deconvolved. A minimum vertical electron beam size of 1.07 ${\pm}$ 0.06 (stat.) ${\pm}$ 0.05 (sys.) {\mu}m was measured. A vertically focussing quadrupole just before the laserwire was varied whilst making laserwire measurements and the projected vertical emittance was measured to be 82.56 ${\pm}$ 3.04 pm rad.
Original languageUndefined/Unknown
Publication statusPublished - 1 Apr 2014


  • physics.acc-ph
  • physics.ins-det

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