Greifswald 2009 – scientific programme

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P: Fachverband Plasmaphysik

P 15: Poster: Diagnostik

P 15.23: Poster

Wednesday, April 1, 2009, 17:30–19:30, Foyer des IfP

probing the TNSA fields using self-generated THz radiation at relativistic intensities — •amrutha gopal¹, thomas gaumnitz¹, jens polz¹, wolfgang ziegler¹, malte kaluza¹, torsten may², boris pradarutti³, and gerhard paulus¹ — ¹Institute for Optics and Quantumelectronics,Friedrich-Schiller-University Jena,GERMANY — ²Institute of Photonic Technologies,Jena, GERMANY — ³Fraunhofer Institute IOF,Jena,GERMANY

We propose a novel technique for the characterization of the TNSA field using angularly resolved measurement of self generated THz radiation. Here we present the preliminary results of an experiment performed at the JETI laser facility at IOQ. We have detected radiation up to 3 THz at intensities ~ 10^19 W/cm^2 from 5 micron thick Titanium targets. The data are compatible with our model which attributes the emission of THz radiation to the accelerating electron-ion sheath at the back of the target, acting like an oscillating dipole. A comparison between the experimental data and results of two dimensional particle in cell simulation will be presented.