J. Phys. IV France
Volume 133, June 2006
Page(s) 549 - 551
Publié en ligne 16 juin 2006
Inertial Fusion Sciences and Applications 2005
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 549-551

DOI: 10.1051/jp4:2006133113

Control of proton beam divergence in intense-laser foil-plasma interaction

S. Kawata, R. Sonobe, S. Miyazaki, K. Sakai and T. Kikuchi

Graduate School of Engineering, Utsunomiya University, 7-1-2 Yohtoh, Utsunomiya 321-8585, Japan

Quality of an ion beam is one of the critical factors in intense-laser ion beam generation. A purpose of this study is suppression of transverse proton divergence by a controlled electron cloud in laser-foil interactions. In this study, the foil target has a hole at the opposite side of the laser illumination. The electrons accelerated by an intense laser are limited in transverse by a neutral plasma at a protuberant part. Therefore the protons are accelerated and also controlled transversely by the electron cloud structure. In our 2.5-dimensional Particle-in-Cell simulations we demonstrate that the transverse shape of the electron cloud is well controlled and the collimated proton beam is generated successfully in the target with the hole.

© EDP Sciences 2006