Beam Profile Measurements and Simulations of the PETRA Laser-Wire
  The Laser-wire will be an essential diagnostic tool at the International Linear Collider. It uses a finely focussed laser beam to measure the transverse profile of electron bunches by detecting the Compton-scattered photons (or degraded electrons) downstream of where the laser beam intersects the electron beam. Such a system has been installed at the PETRA storage ring at DESY, which uses a piezo-driven mirror to scan the laser-light across the electron beam. Lat- est results of experimental data taking are presented and compared to detailed simulations using the Geant4 based program BDSIM. 
J. Carter (1), I. Agapov (1), G. A. Blair (1), G. Boorman (1), C.   Driouichi (1), F. Poirier (1), M. T. Price (1), T. Kamps...