Betatron oscillations of electrons accelerated in laser wakefields characterized by spectral x-ray analysis.
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.
Albert
Félicie
F
Laboratoire d'Optique Appliquée, ENSTA, CNRS UMR7639, Ecole Polytechnique, Chemin de la Hunière, 91761 Palaiseau, France.
Shah
Rahul
R
Phuoc
Kim Ta
KT
Fitour
Romuald
R
Burgy
Fréderic
F
Rousseau
Jean-Philippe
JP
Tafzi
Amar
A
Douillet
Denis
D
Lefrou
Thierry
T
Rousse
Antoine
A