Berlin 2005 – scientific programme

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SYLP: Relativistische Laser-Plasma-Physik

SYLP 2: Relativistische Laser-Plasma-Physik 2

SYLP 2.7: Talk

Saturday, March 5, 2005, 16:40–17:00, HU Senatssaal

Plasma of extreme energy density by intense VUV-beams — •Annika Krenz and Jürgen Meyer-ter-Vehn — Max-Planck-Institut für Quantenoptik Hans-Kopfermann-Str.1, Garching

We report on new possibilities to generate solid-density plasma at extreme energy density by intense VUV-beams becoming available at DESY in 2005. The VUV-FEL TESLA Test Facility TTF2 will provide pulses of 10¹³ photons with 20-200eV photon energy and 100fs pulse duration reaching intensities up to 10¹⁷W/cm² by focussing up to 1µ m². Photons in this energy range show maximum absorption and energy deposition in solids and therefore producing uniform plasma layers at solid density with temperatures up to 500eV. In this context we discuss the absorption mechanism of VUV light in solid targets. In addition scattered photons will provide detailed information on the structure of the generated plasma. This offers new possibilities to study equations of state and opacities over a wide range of the phase diagram also in the regime relevant for Inertial Confinement Fusion. Besides, fundamental studies of the warm dense matter regime (0,1-10eV) are of particular interest in first experiments. Here the liquid-gas phase transitions are located and therefore the information about the critical points which are unknown for many materials.