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Electron dynamics and γ and e(-)e(+) production by colliding laser pulses.

M Jirka1,2, O Klimo1,2, S V Bulanov3

  • 1Institute of Physics of the CAS, ELI-Beamlines Project, Na Slovance 2, 182 21 Prague, Czech Republic.

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|March 18, 2016
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Summary

Electron dynamics under intense colliding laser pulses lead to gamma and pair production. Linear polarization is more efficient for photon emission and pair creation than circular polarization, enabling cascade development.

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Area of Science:

  • High-intensity laser-matter interactions
  • Quantum electrodynamics in extreme conditions

Background:

  • Investigating electron bunch behavior under intense laser fields is crucial for understanding high-energy phenomena.
  • Photon emission and electron-positron pair production are key processes in extreme light-matter interactions.

Purpose of the Study:

  • To study the dynamics of an electron bunch irradiated by two focused colliding super-intense laser pulses.
  • To analyze the resulting gamma ($\gamma$) and electron-positron ($e^{-}e^{+}$) pair production.
  • To identify conditions for cascade development and $\gamma e^{-}e^{+}$ plasma creation.

Main Methods:

  • Simulation of electron bunch dynamics under colliding laser pulses.
  • Analysis of photon emission and pair production rates.
  • Parameter dependence study on laser intensity and wavelength.

Main Results:

  • Electron dynamics exhibit attractors in the standing wave formed by colliding pulses.
  • Photon emission and pair production are generally more efficient with linearly polarized laser pulses compared to circularly polarized ones.
  • Key parameters influencing cascade development were identified based on laser intensity and wavelength.

Conclusions:

  • The study elucidates the role of laser polarization in enhancing photon emission and pair production.
  • Attractors in electron dynamics play a significant role in the efficiency of these processes.
  • Conditions for creating $\gamma e^{-}e^{+}$ plasma through laser-driven cascades are established.