A Raman Imaging Microscope (alpha300 R, WITec) is installed in the CAS laboratory. The instrument is equipped with two lasers operating at 488 and 785 nm, and two spectrometers with a resolution of 1 cm-1
. The lateral resolution of the microscope can reach the submicron level in the most favorable configuration. Microspectroscopy is the primary technique to analyze spectroscopic properties in 2D and 3D space, enabling the study of composite materials. With this technique it is thus possible to examine samples like meteorites and interstellar dust, and to assess the role of different substrates in the interaction with the ice mantles. The Raman microscope is coupled with a customized design cryostat, configured with a tunable gas inlet capable of depositing spatially resolved ice samples to address their surface diffusion properties.