Theoretical and experimental studies of electron deposition in thin targets

Abstract

Experiments performed on CHANTECLAIR to study the absorption of relativistic electron beams in thin foils are discussed. High z target REB interaction is simulated with the TRAJEC code coupled to an hydrodynamic code. TRAJEC calculates electron trajectories in the target's region resulting from macroscopic self beam and diode fields and magnetic field diffused in the target plasma; in this treatment, magnetic field and particle motion are self consistent and the energy deposition at each electron pass through the target is calculated. These simulations indicate that a deposition enhancement factor of about 2 to 3 is obtained in our experiments, with a rear side temperature of 15–25 ev, in good agreement with experimental data.