Düsseldorf 2007 – scientific programme

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SYRL: Symposium Relativistische Laserplasmen

SYRL 2: Relativistische Laserplasmen

SYRL 2.4: Invited Talk

Friday, March 23, 2007, 15:30–16:00, 6C

Proprieties of Laser Triggered Micro Lens for Energy Selection and Focusing of MeV protons — •Toma Toncian — Institut für Laser- und Plasmaphysik, Heinrich-Heine-Universität Düsseldorf, 40225 Düsseldorf, Germany

The acceleration of MeV ions from the interaction of high- intensity laser-pulses with solids has major applicative prospects because of the high beam quality of this beams. However this beams are polyenergetic and divergent at the source. With the aid of a laser triggered micro lens tunable energy selection and focusing of MeV proton beams has been recently demonstrated (Toncian et. al. Science 312, 410 (2006)). A high intenstity laser pulse is focused onto the wall of a hollow cylinder. The radial electric field associated to plasma expansion from the walls acts as a focussing lens on positive charged ions injected allong the axis of the cylinder. Here we present a more detailed studies of the proprieties of the laser triggered lens. Specially the dependence on triggering time and triggering pulse intensity of the focal length is addressed. The electron transport in the lens is discussed.