Deducing the electron-beam diameter in a laser-plasma accelerator using x-ray betatron radiation |
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Authors: | 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 |
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Institution: | Institut für Optik und Quantenelektronik, Friedrich-Schiller Universit?t Jena, Jena, Germany. |
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Abstract: | 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) μm we are able to estimate the electron bunch diameter to be (1.6±0.3) μm. |
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