Plasma-photonic spatiotemporal synchronization of relativistic electron and laser beams
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Plasma-photonic spatiotemporal synchronization of relativistic electron and laser beams

  • Author(s): Scherkl, Paul
  • Knetsch, Alexander
  • Heinemann, Thomas
  • Sutherland, Andrew
  • Habib, Ahmad Fahim
  • Karger, Oliver
  • Ullmann, Daniel
  • Beaton, Andrew
  • Kirwan, Gavin
  • Manahan, Grace
  • Xi, Yunfeng
  • Deng, Aihua
  • Litos, Michael Dennis
  • OShea, Brendan D
  • Green, Selina Z
  • Clarke, Christine I
  • Andonian, Gerard
  • Assmann, Ralph
  • Jaroszynski, Dino A
  • Bruhwiler, David L
  • Smith, Jonathan
  • Cary, John R
  • Hogan, Mark J
  • Yakimenko, Vitaly
  • Rosenzweig, James B
  • Hidding, Bernhard
  • et al.
Abstract

Modern particle accelerators and their applications increasingly rely on precisely coordinated interactions of intense charged particle and laser beams. Femtosecond-scale synchronization alongside micrometre-scale spatial precision are essential e.g. for pump-probe experiments, seeding and diagnostics of advanced light sources and for plasma-based accelerators. State-of-the-art temporal or spatial diagnostics typically operate with low-intensity beams to avoid material damage at high intensity. As such, we present a plasma-based approach, which allows measurement of both temporal and spatial overlap of high-intensity beams directly at their interaction point. It exploits amplification of plasma afterglow arising from the passage of an electron beam through a laser-generated plasma filament. The corresponding photon yield carries the spatiotemporal signature of the femtosecond-scale dynamics, yet can be observed as a visible light signal on microsecond-millimetre scales.

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