Motivated by corresponding experimental prospects (such as E3 or LUXE at DESY) we study strong-field Breit-Wheeler pair production by bremsstrahlung gamma-rays propagating through a high-intensity optical laser wave. The influence of the broad frequency spectrum of the bremsstrahlung on the properties of the process in the transition region between the perturbative and the non-perturbative...
Current experimental efforts toward the detection of the nonperturbative nonlinear strong-field regime of Breit-Wheeler pair creation plan to combine incoherent sources of GeV $\gamma$ quanta and tightly focussed optical laser pulses. This endeavour calls for a theoretical understanding of how the pair yields depend on the applied laser field profile [1]. In the present discussion, we provide...
In the paper Relativistic Quantum Transport Theory for
Electrodynamics by Zhuang, Heinz et al. a complete set of kinetic
equations for the covariant equal-time formulation of the quantum
kinetic theory is derived. We expand on this theory by computing
numerical solutions for time-dependent electric fields in the Schwinger
approximation. Early results suggest an important role of the...
Updates on the E3 experiment at CALA and the first background measurements with the single particle detectors.
We will present an update on project related preparatory studies at CALA.
