ELETTRA is a multidisciplinary Synchrotron Light Laboratory in AREA Science Park, open to researchers in diverse basic and applied fields. The laboratory is equipped with ultra-bright light sources in the spectral range from UV to X-rays and offers a stimulating and competitive environment to researchers from all over the world.




Science Update

First two-photon pump-probe experiment using the Elettra Storage-Ring Free-Electron Laser

M. Coreno, E. Allaria, M. Danailov, E. Karantzoulis, L. Romanzin, C. Spezzani, M. Trovò, J. Urbancic, G. De Ninno

The Elettra storage-ring free-electron laser is a stable and reliable light source, well suited for producing intense and coherent VUV harmonic radiation in seeded “single-pass” configuration
[G. De Ninno at al., Phys. Rev. Lett. 101, 053902 (2008)].
Ultra-short (~100 fs, FWHM), close to transform-limit, harmonic pulses are produced at several wavelengths between 390 and 87 nm, with fully adjustable polarization and intensities several orders of magnitudes above spontaneous emission (e.g., ~1010 photons/pulse at 130 nm). The source is stable, shot-to-shot fluctuations being of the order of few percent. Thanks to the above mentioned performance, we recently start first two-photon pump-probe test experiments, both on gas-phase and solid-state samples.
The picture shows the yield of Acetylene ions, in a two-color resonant ionization experiment, as a function of the pump-probe delay.
In this case, the harmonic signal at 130 nm was used as a pump, and the seed laser at 390 nm as probe.
This first result on a low-density gas-phase sample clearly demonstrates the feasibility of pump-probe experiments with sub-ps temporal resolution using our radiation source.
We acknowledge the help of the Elettra machine group and, in particular, the precious contribution of A. Carniel, S. Krecic and M. Vento.




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Photons for Medicine and Materials Science
Melbourne, Australia
19-21/02, 2010



Workshop on Fermentation Technology for Large Scale Protein Production
Trieste, Italy
26-30/04, 2010