2025/01/01 by Ze Chen, Yunliang Wang, Chengkai Li +4
Engineering · Physics and Astronomy · #Laser-Matter Interactions and Applications #Laser-Plasma Interactions and Diagnostics #Pulsed Power Technology Applications
paper · doi:10.1063/5.0233972
openalex publication_date 2025/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Ultraintensity isolated zeptosecond pulses (ZPs) can be generated by an attosecond x-ray free-electron laser pulse normally incident on ultradense plasma slabs via the coherent bremsstrahlung (CB) regime in the transmission direction. In the unique CB regime, only one forwardly moving primary relativistic electron sheet (RES) contributes to the transmitted radiation, while the secondary RESs move in the reflection direction. The primary RES is accelerated to ultrarelativistic velocity with several multiple accelerations due to the charge compensation effect from the trajectory crossing between primary RES and secondary RES, then decelerated subsequently and eventually emits an ultraintensity isolated half-cycle ZP. The ZP has an intensity of ∼7.81×1022 W/cm2, and a duration of 650 zs, and a power of ∼2.45×1015 W that reaches the petawatt level. The x-ray laser pulse-driven petawatt ZP emission mechanism may open the intra-nuclear dynamics and the high-field QED in vacuum studies.