Electron diffraction using ultrafast electron bunches from a laser-wakefield accelerator at kHz repetition rate

Z.-H He 1 A. G. R. Thomas 1 B Beaurepaire 2 J. A. Nees 1 B Hou 1 Victor Malka 2 K Krushelnick 1 Jérôme Faure 2
1 CUOS - Center for Ultrafast Optical Sciences
2 LOA - Laboratoire d'optique appliquée
Abstract : We show that electron bunches in the 50-100 keV range can be produced from a laser wake-field accelerator using 10 mJ, 35 fs laser pulses operating at 0.5 kHz. It is shown that using a solenoid magnetic lens, the electron bunch distribution can be shaped. The resulting transverse and longitudinal coherence is suitable for producing diffraction images from a polycrystalline 10 nm aluminum foil. The high repetition rate, the stability of the electron source and the fact that its uncorrelated bunch duration is below 100 fs make this approach promising for the development of sub-100 fs ultrafast electron diffraction experiments.
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Z.-H He, A. G. R. Thomas, B Beaurepaire, J. A. Nees, B Hou, et al.. Electron diffraction using ultrafast electron bunches from a laser-wakefield accelerator at kHz repetition rate. Applied Physics Letters, American Institute of Physics, 2013, 102, pp.064104. ⟨10.1063/1.4792057⟩. ⟨hal-01159028⟩

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