Single particle detection system for strong-field QED experiments

Abstract Measuring signatures of strong-field quantum electrodynamics (SF-QED) processes in an intense laser field is experimental challenge: it requires detectors to be highly sensitive single electrons and positrons the presence typically very strong x-ray ? -photon background levels. In this paper, we describe a particle detector capable diagnosing leptons from SF-QED interactions discuss level simulations for upcoming Experiment-320 at FACET-II (SLAC National Accelerator Laboratory). The detection system described here combines pixelated scintillation LYSO screens Cherenkov calorimeter. We detail performance using calibration ELBE accelerator. Single 3 GeV are expected produce approximately 537 detectable photons calorimeter channel. This signal compared Monte-Carlo experiment. A signal-to-noise ratio 18 spectral resolution 2% achieved screens.