Figure 1. Correlated spectrum of angular momentum and energy (SAME) at the tunnel exit for photoelectrons originating from ionization of the helium atom exposed to (1) circularly or (2) elliptically ...

Particle accelerators such as those at the European Organization for Nuclear Research (CERN) in Geneva are typically highly ...

Physicists at Heinrich Heine University and Forschungszentrum Jülich have demonstrated for the first time that helium‑3 ions retain their polarization during laser–plasma acceleration. Polarization, ...

Figure 1: Schematic diagram of the experimental setup. The laser propagates along the z axis and the polarization plane of two-color pulses lies in the x-y plane. The upper diagram shows the ...