Seminarium Fizyki Wielkich Energii

The Laser Und XFEL Experiment (LUXE), in planning at DESY Hamburg, is intended to study quantum electrodynamics (QED) in strong electromagnetic fields, the transition from perturbative to non-perturbative regime in particular. The experiment will make precision measurements of the photon and positron rates in collisions between a high-intensity laser pulse and the 16.5 GeV electron beam of the European XFEL, or the high-energy secondary photons it produces. After an overview of the physics case and LUXE experiment concept, I will focus on the activities of the Warsaw LUXE group contributing to the construction of the highly compact positron calorimeter for LUXE, ECAL-P. Design concept and first results from the beam tests of the ECAL-P prototype will be presented.