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SYLP: Relativistische Laser-Plasma-Physik

SYLP 1: Relativistische Laser-Plasma-Physik 1

SYLP 1.3: Talk

Saturday, March 5, 2005, 11:00–11:20, HU Senatssaal

A photon-collider at relativistic intensities — •Ben Liesfeld, Kay-Uwe Amthor, Jens Bernhardt, Heinrich Schwoerer, and Roland Sauerbrey — Institut fuer Optik und Quantenelektronik, Friedrich-Schiller-Universitaet Jena

We present an experimental setup in which two high-intensity ultra-short laser pulses counter-propagate through a common focus positioned in a He gas-jet. The setup is located in a vacuum chamber and fully computer controlled and allows for precise focusing and spacial and temporal overlap of the two foci. A single-shot autocorrelation of an ultra-short laser pulse at relativistic intensity (3×10¹⁸ W/cm²) was carried out. Non-linear Thomson scattering from plasma electrons in the He gas-jet was used as second-order autocorrelation signal. Beyond this first pulse duration measurements at relativistic intensities the presented setup offers the means for the generation of counter-propagating particle beams, for Thomson scattering of a laser beam with a counter-propagating laser-accelerated electron beam or for the generation of particle-anti-particle pairs.