A poor man’s X-FEL
Build your own single-shot, femtosecond electron diffractometer
- as accessory to your sample preparation chamber -
move your mouse over the image to see interior of the setup
The first hard-X-ray Free Electron Laser, a huge and expensive facility, recently fulfilled (one of) its promise(s) by providing diffraction patterns –and thus structural information- with a time resolution in the femtosecond range. More recently still, the alternative of using electron diffraction was demonstrated, in a table-top device, with similar time resolution and less radiation damage . This novel device is based on the recent insight that the Coulomb explosion of electron bunches in the 100-keV range, which until now prevented both single-shot measurements and sub-100 fs resolution, can be made fully reversible by tailoring the spatial distribution of the bunch charge . The device applies down-sized, low-power versions of the RF technology commonly used in high-energy accelerators.
 T. van Oudheusden, O.J. Luiten et al, Phys.Rev.Letters 105 (2010) 264801
 O. J. Luiten, S. B. van der Geer, M. J. de Loos, F. B. Kiewiet and M. J. van der Wiel, Phys.Rev.Letters 93 (2004) 094802