Skip to Main content Skip to Navigation
New interface
Journal articles

Effect of the Laser Wave Front in a Laser-Plasma Accelerator

Abstract : A high-repetition rate electron source is generated by tightly focusing kHz, few-mJ laser pulses into an underdense plasma. This high-intensity laser-plasma interaction leads to stable electron beams over several hours but with strikingly complex transverse distributions even for good quality laser focal spots. We find that the electron beam distribution is sensitive to the laser wave front via the laser midfield distribution rather than the laser focal spot itself. We are able to measure the laser wave front around the focus and include it in realistic particle-in-cell simulations demonstrating the role of the laser wave front on the acceleration of electrons. Distortions of the laser wave front cause spatial inhomogeneities in the midfield laser intensity and, consequently, the laser pulse drives an inhomogeneous transverse wakefield whose focusing and defocusing properties affect the electron distribution. These findings explain the experimental results and suggest the possibility of controlling the electron spatial distribution in laser-plasma accelerators by tailoring the laser wave front.
Document type :
Journal articles
Complete list of metadata

Cited literature [28 references]  Display  Hide  Download
Contributor : Jérôme Faure Connect in order to contact the contributor
Submitted on : Monday, November 23, 2015 - 1:30:48 PM
Last modification on : Wednesday, May 11, 2022 - 3:22:04 PM
Long-term archiving on: : Friday, April 28, 2017 - 2:56:08 PM


Publisher files allowed on an open archive



B Beaurepaire, A Vernier, M Bocoum, F Böhle, A Jullien, et al.. Effect of the Laser Wave Front in a Laser-Plasma Accelerator. Physical Review X, 2015, 5, pp.031012. ⟨10.1103/PhysRevX.5.031012⟩. ⟨hal-01229133⟩



Record views


Files downloads