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K: Kurzzeitphysik
K II: HV II
K II.1: Hauptvortrag
Dienstag, 3. April 2001, 15:30–16:15, EB107
Intense Ion Beams Accelerated by Relativistic Laser Plasmas — •M. Roth1, T.E. Cowan2, J.-C. Gauthier3, M. Geissel4, M. Blažević4, T. Schlegel4, M. Allen2, P. Audebert3, J. Fuchs3, M. Hegelich5, S. Karsch5, J. Meyer-ter-Vehn5, and A. Pukhov5 — 1Gesellschaft für Schwerionenforschung, Darmstadt, Germany — 2General Atomics, P.O.Box 85608, San Diego, USA — 3LULI, Ecole Polytechnique, Palaiseau, France — 4TU-Darmstadt, Germany — 5MPQ, Garching, Germany
Intense ion beams emitted off the rear surface of solid targets
irradiated with laser intensities > 1019 W/cm2 have been
discovered using multiterawatt CPA-lasers. The ions were
accelerated by hot electrons, that form a charge separating
electrostatic sheath (Target Normal Sheath Acceleration, TNSA),
and were
emitted always normal to the cold, nonirradiated rear surface of
the target. We present experimental results using the 100 Terawatt
laser system at the Laboratoire pour L’Utilisation Lasers Intense
(LULI) to investigate the acceleration mechanism and to explore
future applications of the intense, short pulse ion beams. We will
present results on the angle dependent energy distribution, beam
emittance, total yield, target properties, and show experimental
demonstration
of using protons for picosecond radiography.
This work was supported by the EU - large scale facility access
program.