12 May 2015 FEL-based transient grating spectroscopy
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Abstract
In this manuscript we report on a compact experimental set-up (“mini-TIMER”) conceived for transient grating (TG) experiments based on free electron laser (FEL) radiation. This set-up has been tested at the seeded FEL facility FERMI (Elettra, Trieste, Italy) and allowed us to observe the first FEL-stimulated TG signal. This experimental result is of the greatest relevance in the context of developing coherent non-linear optical methods into the extreme ultraviolet (EUV) and soft X-ray (SXR) range. Such a challenging task will be addressed in the next future at FERMI by using the present set-up and the forthcoming EIS-TIMER beamline, which is being installed at FERMI and will start the commissioning phase in the second semester 2015. The possibility to use TGs generated by FEL radiation at sub-optical wavelengths would allow developing EUV/SXR four-wave-mixing (FWM) applications, so far considered only theoretically and widely believed to be potentially able to provide major breakthroughs in several fields of science.
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F. Bencivenga, F. Bencivenga, R. Cucini, R. Cucini, F. Capotondi, F. Capotondi, A. Battistoni, A. Battistoni, R. Mincigrucci, R. Mincigrucci, E. Giangrisostomi, E. Giangrisostomi, A. Gessini, A. Gessini, M. Manfredda, M. Manfredda, I. P. Nikolov, I. P. Nikolov, E. Pedersoli, E. Pedersoli, E. Principi, E. Principi, C. Svetina, C. Svetina, P. Parisse, P. Parisse, F. Casolari, F. Casolari, M. B. Danailov, M. B. Danailov, M. Kiskinova, M. Kiskinova, C. Masciovecchio, C. Masciovecchio, } "FEL-based transient grating spectroscopy", Proc. SPIE 9512, Advances in X-ray Free-Electron Lasers Instrumentation III, 951212 (12 May 2015); doi: 10.1117/12.2186121; https://doi.org/10.1117/12.2186121
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