Greifswald 2009 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 19: Poster: Sonstiges
P 19.5: Poster
Mittwoch, 1. April 2009, 17:30–19:30, Foyer des IfP
Multi-stage laser ion acceleration — •Jens Polz1, Oliver Jäckel1, Sebastian M. Pfotenhauer1, Hans-Peter Schlenvoigt1, Jens Heymann1, Malte C. Kaluza1, Alexander Sävert1, Amrutha Gopal1, Sven Steinke2, and Alex P. L. Robinson3 — 1Institut für Optik und Quantenelektronik, Jena, Germany — 2Max-Born-Institut, Berlin, Germany — 3Rutherford Appleton Laboratory, Chilton, UK
During the last years, high-intensity lasers have shown to be a promising candidate for the production of high-energy particle beams. So far, the peak particle energy was limited by the available laser power. To overcome this limitation, staged acceleration schemes have been proposed. Here, we report the first experimental realization of such a staged acceleration. A proton population exhibiting a thermal energy spectrum was produced via target-normal sheath acceleration (TNSA) during the interaction of one part of the 10-TW JETI laser pulse with a thin foil. This proton beam propagated towards a second foil, where the second part of the laser generated a second TNSA field. This second field spectrally modulated the proton pulse, boosting a part of the population to higher energies. These results have been verified by numerical simulations. They clearly show that by applying staged acceleration schemes, one can overcome the limitations in peak energy set by the laser power.