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The outcomes obtained in laboratory tests, using scintillator bars learn by silicon photomultipliers are reported. The present approach is step one for designing a precision monitoring system to be placed inside a free magnetized volume for the cost identification of low energy crossing particles. The devised system is demonstrated in a position to provide a spatial resolution higher than 2 mm. Scintillators, wireless item locator Photon Solid State detector, particle monitoring gadgets. Among the many deliberate activities was the development of a gentle spectrometer seated in a 20-30 m3 magnetized air volume, the Air Core Magnet (ACM). The whole design must be optimised for the determination of the momentum and charge of muons in the 0.5 - 5 GeV/c range (the mis-identification is required to be lower than 3% at 0.5 GeV/c). 1.5 mm is required contained in the magnetized air quantity. On this paper we report the outcomes obtained with a small array of triangular scintillator bars coupled to silicon photomultiplier (SiPM) with wavelength shifter (WLS) fibers.



This bar profile is right here demonstrated able to supply the mandatory spatial decision 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 changing commonplace photomultipliers in lots of experimental conditions. Tests have been performed with laser beam pulses and radioactive source with a purpose to characterize the scintillator bar response and SiPM behaviour. Here we briefly current the observed behaviour of the SiPM utilized in our assessments regarding the main sources of noise and iTagPro support the effect of temperature on its response and linearity. Several fashions and packaging have been considered. The principle supply of noise which limits the SiPM’s single photon resolution is the "dark current" rate. It is originated by cost carriers thermally created within the delicate quantity and current within the conduction band and therefore it depends on the temperature. The dependence of the darkish present single pixel rate as a function of the temperature has been investigated using Peltier cells in order to change and iTagPro bluetooth tracker keep the temperature managed.



Dark current price depends also on the Vwk as proven in Fig. 3. To be able to have low rates of dark current the value of Vbias has been fixed at 1.5 V giving a working voltage Vwk of 29 V. It is clear that, iTagPro USA if essential, it can be handy to make use of a bias voltage regulator which mechanically compensates for temperature variations. Not at all times the pixels of the SiPM work independently from each other. Photoelectrons (p.e.) can migrate from the hit pixel to another indirectly fired by a photon. Optical cross-speak between pixels leads to a non-Poissonian behaviour of the distribution of fired pixels. An estimate of the optical cross speak likelihood can be obtained by the ratio double-to-single pulse fee as a function of the temperature. The probability depends weakly on the temperature and the measured level of cross-talk (15-16%) is appropriate with the one reported in the datasheet. SiPM response once its basic parameters and cells configuration are given.