Stuttgart 2012 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 8: Dichte Plasmen, Schwerionen- und Laserplasmen
P 8.4: Vortrag
Dienstag, 13. März 2012, 11:45–12:00, V57.02
Simulation study for the LIGHT project: Characterization of TNSA from double-layer targets — •Zsolt Lecz1, Vladimir Kornilov2, and Oliver Boine-Frankenheim1,2 — 1TU Darmstadt, TEMF — 2Darmstadt, GSI
This contribution to the LIGHT (Laser Ion Generation, Handling and Transport) project at GSI is devoted to the numerical investigation of the proton acceleration via the TNSA (Target Normal Sheath Acceleration) mechanism. The protons are accelerated from a thin hydrogen-rich contamination layer deposited on the rear surface of a thin metal foil (few µm) interacting with intense (1019 W/cm2) and short (several 100 fs) laser pulse. The electric field induced by the large hot electron pressure is investigated by using 1D and 2D particle-in-cell (PIC) electro-magnetic simulations. Depending on the thickness of the layer the protons can be accelerated in three different ways: quasi-static acceleration for mono-layers, isothermal plasma expansion for thick layers and there is a combined regime for intermediate thickness wich is not well understood yet. The transverse acceleration (divergence) of the protons also depends on the layer thickness and is very different for the two extreme cases. A comparison of analytical models and PIC simulations will be presented.