Photon-in, Photon-Out Gas-Phase Experiments at the SPring-8 Compact SASE Source SCSS

The study of the interaction of electromagnetic radiation with matter is currently undergoing a revolution with the advent of coherent, intense, ultrafast radiation sources at short wavelengths. In the extreme ultraviolet (EUV) to soft X-ray wavelength region sources based on high-harmonic generation can provide attosecond pulses, and in the soft X-ray to hard X-ray region free electron lasers provide unprecedented intensities of coherent radiation. In this article we describe some gas phase fluorescence spectroscopy experiments performed using the SPring-8 compact SASE source [1], which was originally constructed as a test facility for the SPring-8 Angstrom compact free electron laser SACLA [2].