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The chance to construct a SiPM-readout muon detector (SiRO), using plastic scintillators with optical fibers as sensitive quantity and readout by SiPM photo-diodes, is investigated. SiRO shall be used for monitoring cosmic muons based mostly on amplitude discrimination. The detector concept foresees a stack of 6 energetic layers, grouped in three sandwiches for determining the muon trajectories by means of three planes. The attenuation of the sunshine response along the optical fiber and throughout the channels have been tested. The measurements of the incident muons primarily based on the input amplitude discrimination indicate that this procedure will not be efficient and due to this fact not sufficient, iTagPro locator as only about 30% of the measured events might be used in the reconstruction of the muon trajectories. Based on the studies offered on this paper, the layout used for building the SiRO detector will likely be changed as nicely as the analog acquisition approach will likely be replaced by a digital one.

On this course we intention to setup a multi-purpose, mobile muon monitoring detector based on SiPM readout, called SiRO, the SiPM ReadOut muon detector. The aim of the present paper is to research the possibility to determine the muon incidence and iTagPro their trajectories using scintillator layers readout by optical fibers seen by SiPM gadgets and analysing the amplitude of the occasions. The final idea of the SiRO detector is introduced in addition to checks and measurements with a setup of two first detection modules are described. Unirea salt mine from Slanic Prahova, Romania. The fist prototype is composed of 6 active layers (Fig. 1), each layer consisting of four detection modules. 3 with 12 parallel and equidistant ditches on its surface, each ditch full of optical fibers. Two adjoining optical fibers are linked to a SiPM system to kind a channel, so that each detection module have six channels. In Figure 2 a sketch of one active layer is offered.

Each group of two energetic layers (from top to bottom), with the optical fibers positioned on perpendicular instructions, characterize a sandwich, which ought to decide the position in the input XY airplane of the incident charged particle. Thus, as we can see in Fig. 1, six active layers with four SiRO modules each, grouped in three sandwiches, are put in coincidence to allow the reconstruction of the muon trajectory. The six active layers are indicated as Det1 to Det6 and comprise 24 channels each, so the whole system will give data from 144 individual channels. The 24 signals from each energetic layer are used as an enter by a trigger module to create coincidences by a certain multiplicity criteria in order to produce a set off sign, marking an event of interest. The set off signal is distributed by daisy chain along 3 modules sixty four Channel Digitizer (V1740 CAEN). These modules enable to open an acquisition window with selected pre-trigger time, compensating in this way the necessary delay to supply the trigger pulse.

A USB2.Zero Bridge (V1718 CAEN) is used to transfer the digitized signals to a Pc. Each channel of the digitizer has a SRMA memory, where the event may be readout by utilizing the PCI-VME bridge module. The occasions are learn sequentially and transmitted to the pc. To check the performances of the planned SiRO detector, i.e. its properties, iTagPro in addition to its fluctuations associated to bias voltage, ItagPro temperature, or the space between the interaction level and the SiPM machine, two detection modules have been constructed and positioned in containers for optical screening. To interpret the light signal produced at the interplay of a charged particle with the sensitive quantity of the detector, gadgets like photomultipliers or photodiodes are used to convert the light yield into electrical output through photoelectric impact. Similar to photodiodes, a Silicon Photomultiplier is a semiconductor device, but their sensitive quantity is divided into a matrix of lots of of independent micro-cells, also named pixels, related in parallel. Each micro-cell is operated in Geiger mode, the output signal of the SiPM system being proportional with the variety of independent pixels triggered concurrently.