Journal Article
Laser and Particle Beams, vol. 33, iss. 2, pp. 175-182, 2015
Authors
Amitava Roy, Sivanandan S. Harilal, Syed M. Hassan, Akira Endo, Tomas Mocek, Ahmed Hassanein
Abstract
AbstractWe investigated the expansion dynamics of laser-produced plasmas expanding into an axial magnetic field. Plasmas were generated by focusing 1.064 μm Nd:YAG laser pulses onto a planar tin target in vacuum and allowed to expand into a 0.5 T magnetic field where the field lines were aligned along the plume expansion direction. Gated images employing an intensified charge-coupled device showed focusing of the plasma plume, which were also compared with results, obtained using particle-in-cell modeling methods. The estimated density and temperature of the plasma plumes employing emission spectroscopy revealed significant changes in the presence and absence of the 0.5 T magnetic field. In the presence of the field, the electron temperature is increased with distance from the target, while the density showed opposite effects.
