Principle of the plasma undulator source combined with a laser-plasma accelerator. An electron bunch is created and accelerated at the interaction of an intense femtosecond laser with a millimeter scale plasma. Once accelerated, electrons propagate and are wiggled in a plasma wave. Their relativistic oscillation motion results in the emission of an x-ray beam.
The map of the field obtained from the Wake code is displayed in (a). It corresponds to the wakefield after 0.5 mm of propagation of the laser pulse in the gas jet of density . The profile at is shown in (b).
x-ray angular profile of the plasma wave undulator radiation, in J/sr and per electron.
The on-axis spectrum of the plasma wave undulator radiation is displayed in (a), in J/eV/sr and per electron. The integrated spectrum over angles is shown in (b), in J/eV and per electron.
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