Optical setup for two-colour experiments at the low density matter beamline of FERMI. (23rd October 2017)

• Record Type: Journal Article
• Authors: Finetti, Paola; Demidovich, Alexander; Plekan, Oksana; Fraia, Michele Di; Cucini, Riccardo; Callegari, Carlo; Cinquegrana, Paolo; Sigalotti, Paolo; Ivanov, Rosen; Danailov, Miltcho B; Fava, Claudio; De Ninno, Giovanni; Coreno, Marcello; Grazioli, Cesare; Feifel, Raimund; Squibb, Richard J; Mazza, Tommaso; Meyer, Michael; Prince, Kevin C
• Is Part Of: Journal of optics. Volume 19:Number 11(2017:Nov.)
• Publication Date: 2017-10-23
• Subjects: free electron laser -- two colour spectroscopy -- pump-probe; Optics -- Periodicals; 535.05
• DOI: 10.1088/2040-8986/aa8fbd
• Languages: English
• ISSNs: 2040-8978

Abstract

Abstract: The low density matter beamline of the free electron laser facility FERMI is dedicated to the study of atomic, molecular and cluster systems, and here we describe the optical setup available for two-colour experiments. Samples can be exposed to ultrashort pulses from a Ti:Sapphire source (fundamental, or second or third harmonic), and ultrashort light pulses of FERMI in the EUV/soft x-ray region with a well-defined temporal delay, and negligible jitter (<10 fs) compared to the pulse durations (40–100 fs). Detection schemes available include electron, ion and optical spectroscopy. The majority of experiments using this apparatus are pump-and-probe, where either wavelength can be pump or probe, but the system is also useful for other techniques, such as multi-photon spectroscopy, cross-correlation measurements and alignment of molecules in space.