The Fluid Science Laboratory (FSL) is a multiuser facility developed and built by the European Space Agency (ESA). Its launch onboard the Columbus Laboratory, a module of the International Space Station (ISS) is foreseen in June 2005 according to the present planning. FSL can host sequentially Experiment Containers dedicated to a specific experiment in various scientific areas like fluid science, crystal growth, foams and directional solidification within transparent media and, owing to its adaptable diagnostic tools and its modularity on several levels, complementary science areas such as colloid and aerosol physics, particle agglomeration and plasma crystals are envisaged. The visualisation, monitoring and control of the experiment is based on a set of optical diagnostics included in the FSL facility such as visualisation in two perpendicular directions, velocimetry, ESPI and Wollaston interferometry, Schlieren working in transmission and reflection modes, infrared and a high speed camera. The paper will describe the optical tools included in FSL and their performances.
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