München 2009 – wissenschaftliches Programm

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ST: Fachverband Strahlen- und Medizinphysik

ST 5: MAP: Laser-driven Particle acceleration

ST 5.1: Vortrag

Mittwoch, 11. März 2009, 09:00–09:30, A021

Laser-driven electron acceleration from ultra-thin DLC foils - towards an ultra-compact coherent X-ray source — •Daniel Kiefer^1,2, Andreas Henig^1,2, Daniel Jung^1,2, Kirk Flippo³, Cord Gautier³, Sandrine Gaillard³, Randy Johnson³, Tom Shimada³, Rahul Shah³, Juan Fernandez³, Vitaly Liechtenstein⁵, Jörg Schreiber^1,2,4, Manuel Hegelich^2,3, and Dietrich Habs^1,2 — ¹Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching — ²Ludwig-Maximilians-Universität München, Am Coulombwall 1, D-85748 Garching — ³Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA — ⁴Plasma Physics Group, Blackett Laboratory, Imperial College London, SW7 2BZ, UK — ⁵RRC Kurchatov Institute, 123182, Moscow, Russia

We report on the acceleration of electrons from ultra-thin diamond-like carbon (DLC) foils by an ultrahigh-intensity laser pulse. While thick targets show maxwellian shaped electron spectra, a distinct quasi-monoenergetic characteristic peaked at 31 MeV is observed at a target thickness as thin as 5nm. At the same time, a substantial drop in laser-accelerated ion energies is observed. The experimental findings give first indication that laser-driven relativistic electron mirrors can be generated from ultra-thin foils, which in future may be used to generate brilliant X-ray beams by the coherent reflection of a second laser.