2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/196435The 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.3 pagesm 4 figures. Submitted as a conference paper for the Particle Accelerator Conference 2005 (PAC05)Instrumentation and Detectorstext