Collimated electron jets by intense laser beam-plasma surface interaction under oblique incidence

Oblique incidence of a p-polarized laser beam on a fully ionized plasma with a low density plasma corona is investigated numerically by Particle-In-Cell and Vlasov simulations in two dimensions. Energetic electrons which propagate into the plasma corona in front of the target are observed. The fast electrons are collimated by quasi-steady magnetic fields. The magnetic fields enhance the penetration depth of the electrons into the corona. A scaling law for the angle of the ejected electrons with incident laser intensity is given