title: Imaging electron trajectories in a laser-wakefield cavity using betatron X-ray radiation.
abstract: We demonstrate that betatron x-ray radiation accurately provides direct imaging of electrons trajectories accelerated in laser wakefields. Experimental far field x-ray beam profiles reveal that electrons can follow similar transverse trajectories with typical excursions of 1.5 microm+/-0.5 microm in the plane of laser polarization and 0.7 microm+/-0.2 microm in the plane perpendicular.
authors.affiliation: Laboratoire d'Optique Appliquée, ENSTA, CNRS UMR7639, Ecole Polytechnique, Chemin de la Hunière, 91761 Palaiseau, France. kim.tapuoc@ensta.fr
authors.forename: Kim Ta
authors.initials: KT
authors.lastname: Phuoc
authors.forename: Sebastien
authors.initials: S
authors.lastname: Corde
authors.forename: Rahul
authors.initials: R
authors.lastname: Shah
authors.forename: Felicie
authors.initials: F
authors.lastname: Albert
authors.forename: Romuald
authors.initials: R
authors.lastname: Fitour
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Rousseau
authors.forename: Fréderic
authors.initials: F
authors.lastname: Burgy
authors.forename: Brigitte
authors.initials: B
authors.lastname: Mercier
authors.forename: Antoine
authors.initials: A
authors.lastname: Rousse