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PLASMA-PHYSICS-07 Focusing and transport of laser-accelerated protons with quadrupoles

By M. Schollmeier, M. Geißel, S. Becker, F. Grüner, K. Harres, F. Nürnberg, P. Rambo, U. Schramm, J. Schreiber, J. Schütrumpf, J. Schwarz, B. Atherton, M. Roth, D. Habs, B. M. Hegelich and Tu Darmstadt Germany


The acceleration of MeV-protons and heavier ions by the interaction of an intense laser pulse with a foil target is a well-known phenomenon that has been extensively studied in the last decade. The interaction of a high-energy, highintensity (I> 10 18 W/cm 2) laser pulse with a solid target leads to the acceleration of an ion beam in a very robust and reproducible way with up to 10 13 protons in total. The conversion efficiency of laser energy to proton energy can reach up to 10%, which makes these beams very attractive for applications, e.g. an injection into a synchrotron, which is an experimental scheme of great interest for GSI. However, the beam has a 100 % energy spread, is very short on the order of ps, has a divergence up to 40 o half angle and is neutralized by co-moving electrons. All these issues have to be overcome for a real application as an accelerator

Year: 2010
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