Controlled transport and focusing of laser-accelerated protons with miniature magnetic devices |
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Authors: | Schollmeier M Becker S Geissel M Flippo K A Blazević A Gaillard S A Gautier D C Grüner F Harres K Kimmel M Nürnberg F Rambo P Schramm U Schreiber J Schütrumpf J Schwarz J Tahir N A Atherton B Habs D Hegelich B M Roth M |
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Affiliation: | Institut für Kernphysik, Technische Universit?t Darmstadt, Schlossgartenstrasse 9, Darmstadt, Germany. |
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Abstract: | This Letter demonstrates the transporting and focusing of laser-accelerated 14 MeV protons by permanent magnet miniature quadrupole lenses providing field gradients of up to 500 T/m. The approach is highly reproducible and predictable, leading to a focal spot of (286 x 173) microm full width at half maximum 50 cm behind the source. It decouples the relativistic laser-proton acceleration from the beam transport, paving the way to optimize both separately. The collimation and the subsequent energy selection obtained are perfectly applicable for upcoming high-energy, high-repetition rate laser systems. |
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