Upcoming and planned experiments combining increasingly intense lasers and energetic
particle beams will access new regimes of nonlinear, relativistic, quantum effects. This …

The dynamics of charged particles in electromagnetic fields is an essential component of
understanding the most extreme environments in our Universe. In electromagnetic fields of …

Abstract This Conceptual Design Report describes LUXE (Laser Und XFEL Experiment), an
experimental campaign that aims to combine the high-quality and high-energy electron …

This report presents the conceptual design of a new European research infrastructure
EuPRAXIA. The concept has been established over the last four years in a unique …

We demonstrate the experimental feasibility of probing the fully nonperturbative regime of
quantum electrodynamics with a 100 GeV-class particle collider. By using tightly …

Charged particles accelerated by electromagnetic fields emit radiation, which must, by the
conservation of momentum, exert a recoil on the emitting particle. The force of this recoil …

Spin polarization of an ultrarelativistic electron beam head-on colliding with an ultraintense
laser pulse is investigated in the quantum radiation-dominated regime. We develop a Monte …

Brilliant X-and γ-ray sources with ultrashort duration are widely pursued in fundamental
science, industry and medicine. Compact femtosecond X-ray sources based on relativistic …

Since the invention of chirped pulse amplification, which was recognized by a Nobel Prize in
physics in 2018, there has been a continuing increase in available laser intensity. Combined …

The locally constant field approximation (LCFA) has to date underpinned the numerical
simulation of quantum processes in laser-plasma physics and astrophysics, but its validity …