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Q: Quantenoptik und Photonik
Q 54: Anwendung ultrakurzer Lichtimpulse und Attosekundphysik II
Q 54.10: Vortrag
Mittwoch, 15. März 2006, 16:45–17:00, HIV
Measurement of magnetic field produced by the interaction of ultra-short, ultra-intense fs laser pulse with matter — •Flavio Zamponi1, Ingo Uschmann1, Eyal Kroup2, Andrea Lübcke1, Tino Kämpfer1, Eckhart Förster1, Roland Sauerbrey1, Ytzik Maron2, Evgeny Stambulchik2, Bernhard Hidding3, and Georg Pretzler3 — 1Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743 Jena — 2Weizmann Insitute of Science, Rehovot 76100, Israel — 3Institut für Laser- und Plasmaphysik, Heinrich-Heine Universität Düsseldorf, Universitätsstr. 1, 40225 Düsseldorf
Giant magnetic fields of the order of 104 T are expected to be created by the interaction of an ultra-short, ultra-intense laser pulse with matter. We report on the preliminary results of an experiment where the Zeeman effect in the X-ray range was exploited to monitor the quasi static magnetic field, created by the interaction of an 80 fs, 1 J Ti:sapphire laser pulse with solid matter. The involved laser intensities ranged between 1018 and 5· 1019 W/cm2. The targets were Ti foils of different thicknesses (2, 5, 25 µm). We monitored the X-ray emissions of the Kα 1 and Kα 2 lines by means of a spectrometer with 0.3 eV energy resolution and 4 µm spatial resolution. The spectrometer was composed by a toroidally bent GaAs crystal and a Si plane crystal in dispersionless setup at 45∘, working as polarizer, to distinguish contribution to the line broadening coming from other mechanisms. In addition we used an electron spectrometer to determine the hot electron energy. The role of possible further mechanisms leading to the observed line broadening are discussed.