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The possibility to build a SiPM-readout muon detector (SiRO), using plasticscintillators with optical fibers as sensitive volume and readout by SiPMphoto-diodes, is investigated. SiRO shall be used for tracking cosmic muonsbased on amplitude discrimination. The detector concept foresees a stack of 6active layers, grouped in 3 sandwiches for determining the muon trajectoriesthrough 3 planes. After investigating the characteristics of the photodiodes,tests have been performed using two detection modules, each being composed froma plastic scintillator sheet, $100 \times 25 \times 1\,$cm$^{3}$, with 12parallel, equidistant ditches; each ditch filled with an optical fiber of$1.5\,$mm thickness and always two fibers connected to form a channel. Theattenuation of the light response along the optical fiber and across thechannels have been tested. The measurements of the incident muons based on theinput amplitude discrimination indicate that this procedure is not efficientand therefore not sufficient, as only about 30\% of the measured events couldbe used in the reconstruction of the muon trajectories. Based on the studiespresented in this paper, the layout used for building the SiRO detector will bechanged as well as the analog acquisition technique will be replaced by adigital one.

A feasibility study to track cosmic muons using a detector with SiPM devices based on amplitude discrimination