Aachen PK 2003 – scientific programme

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P: Plasmaphysik

P 19: Plasma Physics

P 19.5: Talk

Friday, March 21, 2003, 11:50–12:10, FO2

Qualitative and Quantitative Electric Field Measurements in Laser Produced Plasmas by Proton Imaging and Deflectometry — •T. Toncian¹, M. Borghesi², J.C. Gauthier³, A. MacKinnon⁴, K. Löwenbrück¹, P. Patel⁴, G. Pretzler¹, L. Romagnani², and O. Willi¹ — ¹Institut für Laser- und Plasmaphysik, Heinrich-Heine-Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf — ²Queens University, Belfast — ³Laboratoire pour l’Utilisation des Lasers Intenses, — ⁴Lawrence Livermore National Laboratory, Livermore,

During the interaction of ultraintense laser pulses with matter (I >10¹⁹ W/cm²) a collimated beam of protons is ejected from the target. These protons can be used to detect electric and magnetic fields generated during the interaction of a second intense laser pulse with high density matter. Two techniques were employed in our experiments at the LULI in Paris. First, point projection imaging gave proton shadowgrams induced by the fields. Second a regular structure imposed onto the proton beam allowed for quantitative determination of proton deflection. The technique is discussed in detail and first results are presented.