Investigations of ultrafast charge dynamics in laser-irradiated targets by a self probing technique employing laser driven protons

H. Ahmed, S. Kar, G. Cantono, G. Nersisyan, S. Brauckmann, D. Doria, D. Gwynne, A. Macchi, K. Naughton, O. Willi, C.L.S. Lewis, M. Borghesi

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Abstract

The divergent and broadband proton beams produced by the target normal sheath acceleration mechanism provide the unique opportunity to probe, in a point-projection imaging scheme, the dynamics of the transient electric and magnetic fields produced during laser-plasma interactions. Commonly such experimental setup entails two intense laser beams, where the interaction produced by one beam is probed with the protons produced by the second. We present here experimental studies of the ultra-fast charge dynamics along a wire connected to laser irradiated target carried out by employing a ‘self’ proton probing arrangement – i.e. by connecting the wire to the target generating the probe protons. The experimental data shows that an electromagnetic pulse carrying a significant amount of charge is launched along the wire, which travels as a unified pulse of 10s of ps duration with a velocity close to speed of light. The experimental capabilities and the analysis procedure of this specific type of proton probing technique are discussed.
Original languageEnglish
Pages (from-to)172-175
Number of pages4
JournalNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume829
Early online date23 Apr 2016
DOIs
Publication statusPublished - 01 Sep 2016

Keywords

  • Target charging

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    Investigations of ultra-fast charge dynamics in laser-irradiated targets by a self proton probing technique

    Ahmed, H. (Contributor), Kar, S. (Creator), Cantono, G. (Contributor), Nersisyan, G. (Contributor), Brauckmann, S. (Contributor), Doria, D. (Contributor), Gwynne, D. (Contributor), Macchi, A. (Contributor), Naughton, K. (Contributor), Willi, O. (Contributor), Lewis, C. (Contributor) & Borghesi, M. (Contributor), Queen's University Belfast, 01 Apr 2016

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