Free-Electron Laser driven by fibre based laser feeding a Laser Plasma Accelerator

摘要

The invention concerns a Free Electron Laser - FEL - EUV or soft X-ray light source comprising: a fibre-based laser (1), comprising a plurality of amplifying fibres wherein an initial seed laser pulse is distributed and amplified, and means for grouping together the elementary pulses amplified in the said fibre in order to form a single amplified global laser pulse (3); a laser plasma accelerator - LPA - (6) based on Laser Wake-Field Acceleration (LWFA) in the bubble regime wherein the said global laser pulse (3) generates relativistic electron beams (10), a beam focusing system (12) transporting electron beams (10) from the laser plasma accelerator (6), an undulator (13) wherein relativistic electron beams (10) generate an electromagnetic beam, and a beam separator system, wherein the said electron beam and the said electromagnetic beam are separated.