J. Phys. IV France
Volume 133, June 2006
Page(s) 499 - 502
Publié en ligne 16 juin 2006
Inertial Fusion Sciences and Applications 2005
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 499-502

DOI: 10.1051/jp4:2006133102

Characterization of ultraintense laser produced fast electron propagation in insulators vs. conductors by optical emission diagnostics

M. Manclossi1, 2, J.J. Santos1, 3, J. Faure1, A. Guenmie-Tafo1, D. Batani1, V. Tikhonchuk3, A. Debayle3 and V. Malka1

1  Laboratoire d'Optique Appliquée - ENSTA, CNRS, École Polytechnique, Palaiseau, France
2  Dipartimento di fisica "G. Occhialini", Università di Milano-Bicocca, Milano, Italy
3  Centre Lasers Intenses et Applications, Universitè Bordeaux 1-CNRS-CEA, Talence, France

The transport of an intense electron-beam produced by Ultra High Intensity laser pulses through metals and insulators has been studied by imaging with high resolution the optical emission (Optical Transition Radiation, Thermal and Cherenkov emission) due to electron transit through the targets. It is observed that if the target is an insulator the fast electron beam undergoes strong filamentation and the filaments increase in number with plastic thickness, with a characteristic growth rate and transversal scale in good agreement with analytical predictions based on electric field instabilities in the beam ionization front.

© EDP Sciences 2006