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.

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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