2021/02/03 by Suo Tang · 8 citations
Physics and Astronomy · #Atomic and Molecular Physics #Atomic physics #Cathode ray #Chirp #Electron #Laser #Laser-Matter Interactions and Applications #Laser-Plasma Interactions and Diagnostics #Nuclear physics #Optics #Photon #Physics #Positron #Pulse (music) #hep-ph
paper · pdf · doi:10.1103/physreva.104.022209
published in Physical Review A 104(2) (American Physical Society)
arxiv created 2021/02/03 · openalex publication_date 2021/08/18 · arxiv updated 2021/08/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
High-energy photons can decay to electron-positron pairs via the nonlinear Breit-Wheeler process when colliding with an intense laser pulse. The energy spectrum of the produced particles is broadened because of the variation of their effective mass in the course of the laser pulse. Applying a suitable chirp to the laser pulse can narrow the energy distribution of the generated electrons and positrons. We present a scenario where a high-energy electron beam is collided with a chirped laser pulse to generate a beam of quasimonoenergetic \ensuremathγ photons, which then decay in a second chirped, UV pulse to produce a quasimonoenergetic source of high-energy electrons and positrons.