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The outcomes obtained in laboratory tests, using scintillator bars read by silicon photomultipliers are reported. The present method is step one for designing a precision monitoring system to be positioned inside a free magnetized volume for the cost identification of low energy crossing particles. The devised system is demonstrated in a position to offer a spatial resolution better than 2 mm. Scintillators, ItagPro Photon Solid State detector, iTagPro bluetooth tracker particle tracking devices. Among the many deliberate activities was the development of a light spectrometer seated in a 20-30 m3 magnetized air quantity, iTagPro bluetooth tracker the Air Core Magnet (ACM). The entire design must be optimised for the willpower of the momentum and ItagPro charge of muons in the 0.5 - 5 GeV/c vary (the mis-identification is required to be lower than 3% at 0.5 GeV/c). 1.5 mm is required inside the magnetized air volume. On this paper we report the results obtained with a small array of triangular scintillator bars coupled to silicon photomultiplier (SiPM) with wavelength shifter (WLS) fibers.

This bar profile is here demonstrated in a position to provide the mandatory spatial resolution in reconstructing the place of the crossing particle by profiting of the charge-sharing between adjoining bars readout in analog mode. SiPMs are excellent candidates in replacing commonplace photomultipliers in lots of experimental conditions. Tests have been carried out with laser beam pulses and radioactive supply with a view to characterize the scintillator iTagPro official bar response and SiPM behaviour. Here we briefly present the noticed behaviour of the SiPM used in our tests concerning the main sources of noise and the impact of temperature on its response and linearity. Several models and iTagPro bluetooth tracker packaging have been thought of. The main source of noise which limits the SiPM’s single photon resolution is the "dark current" fee. It is originated by charge carriers thermally created within the delicate volume and current in the conduction band and therefore it depends upon the temperature. The dependence of the dark current single pixel rate as a function of the temperature has been investigated using Peltier cells so as to alter and keep the temperature managed.

Dark current rate depends also on the Vwk as proven in Fig. 3. With a purpose to have low charges of darkish current the value of Vbias has been mounted at 1.5 V giving a working voltage Vwk of 29 V. It is clear that, if crucial, it can be handy to use a bias voltage regulator which automatically compensates for temperature variations. Not at all times the pixels of the SiPM work independently from one another. Photoelectrons (p.e.) can migrate from the hit pixel to a different circuitously fired by a photon. Optical cross-talk between pixels leads to a non-Poissonian behaviour of the distribution of fired pixels. An estimate of the optical cross discuss chance could be obtained by the ratio double-to-single pulse rate as a perform of the temperature. The likelihood depends weakly on the temperature and the measured degree of cross-talk (15-16%) is compatible with the one reported in the datasheet. SiPM response once its fundamental parameters and cells configuration are given.