Single shot source size measurement of laser driven proton beams with active plasma lens

ORAL

Abstract

Using an active plasma lens we demonstrate a single-shot method to measure the energy-dependent source size of laser driven proton beams. The active plasma lens acts as an imaging system, yielding magnified proton beam spots at a distance of 1.5 meters behind the target. A simple Monte Carlo code is used to simulate the transport and retrieve the source size from the measurement. In the energy range of 3 to 7 MeV we show the measured proton beam source size is 210 to 60 micrometers, with an incident laser spot size of 52 micrometers and a peak laser intensity of 2*1 \textasciicircum 19 W/cm \textasciicircum 2.

*The work was supported by Laboratory Directed Research and Development (LDRD) funding from Lawrence Berkeley National Laboratory provided by the Director, and the U.S. Department of Energy Office of Science Offices of High Energy Physics and Fusion Energy Sciences, under Contract No. DE-AC02-05CH11231. Work at BELLA was also supported by LaserNetUS (https://www.lasernetus.org/). J.H.Bin acknowledges financial support from the Alexander von Humboldt Foundation.

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Authors

  • Lieselotte Obst Huebl

    • Lawrence Berkeley National Laboratory

  • Jianhui Bin

    • Lawrence Berkeley National Laboratory
    • Berkeley National Laboratory

  • Sven Steinke

    • Lawrence Berkeley National Laboratory

  • Qing Ji

    • Lawrence Berkeley National Laboratory

  • Kei Nakamura

    • Lawrence Berkeley National Laboratory

  • Anthony Gonsalves

    • Lawrence Berkeley National Laboratory

  • Jeroen van Tilborg

    • Lawrence Berkeley National Laboratory

  • Sam Barber

    • Lawrence Berkeley National Laboratory

  • Stepan Bulanov

    • Lawrence Berkeley National Laboratory

  • Laura Geulig

    • Lawrence Berkeley National Laboratory

  • Cameron Geddes

    • Lawrence Berkeley National Laboratory

  • Carl Schroeder

    • Lawrence Berkeley National Laboratory

  • Thomas Schenkel

    • Lawrence Berkeley National Laboratory

  • Eric Esarey

    • Lawrence Berkeley National Laboratory