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 …

High-energy spin-polarized electron, positron, and γ-photon beams have many significant
applications in the study of material properties, nuclear structure, particle physics, and high …

We discovered a simple regime where a near-critical plasma irradiated by a laser of
experimentally available intensity can self-organize to produce positrons and accelerate …

Relativistic positron beams are required for fundamental research in nonlinear strong field
QED, plasma physics, and laboratory astrophysics. Positrons are difficult to create and …

The petawatt (PW) laser facility of the Berkeley Lab Laser Accelerator (BELLA) Center has
recently commissioned its second laser pulse transport line. This new beamline can be …

The forthcoming generation of multi-petawatt lasers opens the way to abundant pair
production by the nonlinear Breit–Wheeler process, ie the decay of a photon into an electron …

The study of relativistic electron–positron pair plasmas is both of fundamental physics
interest and important to understand the processes that shape the magnetic field dynamics …

High-power laser facilities give experimental access to fundamental strong-field quantum
electrodynamics processes. A key effect to be explored is the nonlinear Breit-Wheeler …

The direct laser acceleration (DLA) of electrons in underdense plasmas can provide
hundreds of nC of electrons accelerated to near-GeV energies using currently available …

We show that a single laser pulse, traveling through a dense plasma, produces a population
of MeV photons of sufficient density to generate a large number of electron–positron pairs …