title: Betatron oscillations of electrons accelerated in laser wakefields characterized by spectral x-ray analysis.
abstract: Relativistic electrons accelerated by laser wakefields can produce x-ray beams from their motion in plasma termed betatron oscillations. Detailed spectral characterization is presented in which the amplitude of the betatron oscillations r is studied by numerical analysis of electron and x-ray spectra measured simultaneously. We find that r reaches as low as 1 mum in agreement with previous studies of radiation based on coherence and far-field spatial profile.
authors.affiliation: Laboratoire d'Optique Appliquée, ENSTA, CNRS UMR7639, Ecole Polytechnique, Chemin de la Hunière, 91761 Palaiseau, France.
authors.forename: Félicie
authors.initials: F
authors.lastname: Albert
authors.forename: Rahul
authors.initials: R
authors.lastname: Shah
authors.forename: Kim Ta
authors.initials: KT
authors.lastname: Phuoc
authors.forename: Romuald
authors.initials: R
authors.lastname: Fitour
authors.forename: Fréderic
authors.initials: F
authors.lastname: Burgy
authors.forename: Jean-Philippe
authors.initials: JP
authors.lastname: Rousseau
authors.forename: Amar
authors.initials: A
authors.lastname: Tafzi
authors.forename: Denis
authors.initials: D
authors.lastname: Douillet
authors.forename: Thierry
authors.initials: T
authors.lastname: Lefrou
authors.forename: Antoine
authors.initials: A
authors.lastname: Rousse