J. Phys. IV France
Volume 133, June 2006
Page(s) 409 - 412
Publié en ligne 16 juin 2006
Inertial Fusion Sciences and Applications 2005
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 409-412

DOI: 10.1051/jp4:2006133082

Relativistic laser channeling into high-density plasmas

A.L. Lei1, 0, K.A. Tanaka1, 2, A. Pukhov3, R. Kodama1, T. Yabuuchi1, K. Adumi1, R.R. Freeman4, Y. Izawa1, Y. Kitagawa1, K. Kondo1, G.R. Kumar5, T. Matsuoka6, K. Mima1, T. Norimatsu1, O. Shorokhov3, R. Snavely7 and J. Zheng8

1  Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
2  Department of Electronic, Information Systems and Energy Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
3  Institut fur Theoretische Physik I, Heinrich-Heine-Universitat Duesseldorf, Duesseldorf 40225, Germany
4  College of Mathematical and Physical Sciences, the Ohio State University, Columbus, Ohio 43210, USA
5  Tata Institute of Fundamental Research, Mumbai 400005, India
6  University of Michigan, Center for Ultrafast Optical Science, Ann Arbor, MI 48109-2099, USA
7  Lawrence Livermore National Laboratory, University of California, Livermore, CA 94550, USA
8  Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China

We experimentally studied relativistic laser propagation in preplasmas at the highest powers ever attempted-0.2 to 0.4 petawatt. We demonstrated a single conical-shaped plasma channel formation extending several hundred microns in length from the under dense to over dense plasmas, indicating whole-beam self-focused laser channeling into the high-density plasma. The channel cone was reproduced by a three dimensional particle-in-cell simulation. The confirmation of the relativistic laser channeling into high-density plasmas holds the promise of fast igniting a highly compressed fuel plasma core.

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