Laser-driven high-quality positron sources as possible injectors for plasma-based accelerators

Aaron Alejo, Roman Walczak, Gianluca Sarri

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)
180 Downloads (Pure)


The intrinsic constraints in the amplitude of the accelerating fields sustainable by radio-frequency accelerators demand for the pursuit of alternative and more compact acceleration schemes. Among these, plasma-based accelerators are arguably the most promising, thanks to the high-accelerating fields they can sustain, greatly exceeding the GeV/m. While plasma-based acceleration of electrons is now sufficiently mature for systematic studies in this direction, positron acceleration is still at its infancy, with limited projects currently undergoing to provide a viable test facility for further experiments. In this article, we study the feasibility of using a recently demonstrated laser-driven configuration as a relatively compact and inexpensive source of high-quality ultra-relativistic positrons for laser-driven and particle-driven plasma wakefield acceleration studies. Monte-Carlo simulations show that near-term high-intensity laser facilities can produce positron beams with high-current, femtosecond-scale duration, and sufficiently low normalised emittance at energies in the GeV range to be injected in further acceleration stages
Original languageEnglish
Article number5279
Number of pages10
JournalScientific Reports
Publication statusPublished - 27 Mar 2019


  • positron
  • laser
  • wakefield
  • plasma


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