We investigate the properties of a laser-plasma electron accelerator as a bright source of keV x-ray radiation. During the interaction, the electrons undergo betatron oscillations and from the carefully measured x-ray spectrum the oscillation amplitude of the electrons can be deduced which decreases with increasing electron energies. From the oscillation amplitude and the independently measured x-ray source size of ( 1.8 ± 0.3 ) μ m we are able to estimate the electron bunch diameter to be ( 1.6 ± 0.3 ) μ m .
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Deducing the Electron-Beam Diameter in a Laser-Plasma Accelerator <?format ?>Using X-Ray Betatron Radiation
Schnell, Michael; Sävert, Alexander; Landgraf, Björn; Reuter, Maria; Nicolai, Maria; Jäckel, Oliver; Peth, Christian; Thiele, Tobias; Jansen, Oliver; Pukhov, Alexander; Willi, Oswald; Kaluza, Malte C; Spielmann, Christian C
Follow Physical Review Letters
, Volume 108 (7)
American Physical Society (APS) – Feb 17, 2012
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