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Area of Science:

  • Particle physics
  • Accelerator physics
  • Plasma physics

Background:

  • Radio-frequency accelerators face intrinsic limitations in accelerating field amplitude.
  • Plasma-based accelerators offer a promising alternative, sustaining fields exceeding GeV/m.
  • Positron acceleration in plasma environments is underdeveloped, lacking dedicated test facilities.

Purpose of the Study:

  • To investigate the feasibility of a laser-driven configuration for generating ultra-relativistic positrons.
  • To assess the potential of this method as a compact and cost-effective positron source for plasma wakefield acceleration studies.

Main Methods:

  • Utilizing Monte-Carlo simulations to model positron beam generation.
  • Evaluating a recently demonstrated laser-driven configuration.

Main Results:

  • Near-term high-intensity laser facilities can produce GeV-range positron beams.
  • Generated positron beams exhibit high current and femtosecond duration.
  • The beams possess sufficiently low normalized emittance for injection into further acceleration stages.

Conclusions:

  • The proposed laser-driven configuration is a viable method for producing high-quality positron beams.
  • This approach can serve as a compact and inexpensive source for positron plasma wakefield acceleration research.
  • The findings support the development of advanced positron acceleration studies.