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HK: Physik der Hadronen und Kerne

HK 31: Instrumentation und Anwendungen IV

HK 31.7: Vortrag

Mittwoch, 19. März 2003, 15:45–16:00, C

Collimated Mev proton and ion jet production by a 10Hz table-top Titan:Saphir laser system* — •J. Schreiber^1,2, M. Hegelich^1,2, S. Karsch^1,2, U. Schramm², D. Habs², M. Kaluza¹, G. Tsakiris¹, K. Witte¹, W. Günther³, A. Kemp⁴, T. Cowan⁴, A. Blazevic⁵, E. Brambrink⁵, M. Geissel⁵, M. Roth⁵, P. Audebert⁶, J. Fuchs⁶, and J.C. Gauthier⁶ — ¹MPI für Quantenoptik, 85748 Garching, Germany — ²Universität München, 85748 Garching, Germany — ³Universität Siegen, 57068 Siegen, Germany — ⁴General Atomics, San Diego, California 92121 — ⁵GSI Labor, 64291 Darmstadt, Germany — ⁶LULI, Ecole Polytechnique, 91128 Palaiseau, France

Collimated MeV jets of protons and carbon ions from the rear surface of thin foils irradiated with laser intensities up to 10¹⁹ W/cm² are observed in experiments with the 8-TW 10-Hz MPQ ATLAS laser system. We use a Thomson parabola both to characterize the ions and to measure their respective spectrum and yield. In previous single shot experiments with high power (100 TW) laser facilities, energies of up to 5 MeV/nucleon and particle numbers reaching 10¹⁰ per MeV were observed [1]. This was explained by a modified target normal sheath acceleration mechanism. The high-repetition rate of our laser system opens up the possibility for systematic investigations of the underlying acceleration mechanism by varying experimental parameters such as target thickness and material. This will show up the capability for future applications like laser driven ion sources and particle accelerators.

*GSI F+E-program and DFG HA1101/7-2.

[1] M. Hegelich et al., Phys. Rev. Lett. 89, 085002 (2002).