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Nonlinear photoionization with energetic FEL pulses has opened up new horizons for the investigation of inner-shell electron dynamics in atomic and molecular systems [1]. So far, however, the limited temporal resolution (typically a few tens of femtoseconds) achievable with FELs has hampered the time resolution of these dynamics.
Laser-wakefield-accelerated electrons were used to drive an all-optical undulator source, a 5-keV betatron X-ray source and a tunable quasi-monochromatic Compton-X-ray source. Also, we present a phase-contrast tomogram of a fly obtained with the betatron beam.
Harmonics reflected from an oscillating plasma mirror doesn't subject to the limitation of maximum applied laser intensity and can thus exploit the benefit of state-of-the-art terawatt and petawatt laser technology, enabling a route to extreme bright attosecond light sources [1]. When the pulse duration decreases to two laser cycles, intensity gating can lead to an isolated attosecond pulse [2]. This...
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