The present invention relates to a system capable of carrying out efficient and stable system operation control even if a usage rate of the entire system varies under a situation in which the characteristics of storage units, such as maximum available total capacity and speed performance, are largely different from each other. In the light source element, a plurality of the lenses are arranged at a central zone, the plurality of lenses being arranged in a plurality of rows. The nacelle includes a guiding assembly, too. An optical fiber advance mechanism be used to advance andor retract the length of optical fiber to align it within the hollow probe. The experiment utilizes the same pulse sequence for acquiring various one-dimensional and multi-dimensional spectra, with independent receivers tuned to individual resonance frequencies.