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The outcomes obtained in laboratory assessments, utilizing scintillator bars read by silicon photomultipliers are reported. The current approach is step one for designing a precision monitoring system to be positioned inside a free magnetized volume for itagpro bluetooth the cost identification of low power crossing particles. The devised system is demonstrated ready to provide a spatial resolution better than 2 mm. Scintillators, Photon Solid State detector, particle tracking devices. Among the many planned actions was the construction of a gentle spectrometer seated in a 20-30 m3 magnetized air volume, the Air Core Magnet (ACM). The entire design ought to be optimised for the willpower of the momentum and charge of muons in the 0.5 - 5 GeV/c range (the mis-identification is required to be less than 3% at 0.5 GeV/c). 1.5 mm is required inside the magnetized air quantity. In 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 ready to offer the required spatial resolution in reconstructing the position of the crossing particle by profiting of the cost-sharing between adjoining bars readout in analog mode. SiPMs are excellent candidates in replacing standard photomultipliers in many experimental situations. Tests have been performed with laser beam pulses and radioactive supply in order to characterize the scintillator bar response and SiPM behaviour. Here we briefly present the observed behaviour of the SiPM used in our assessments regarding the main sources of noise and the effect of temperature on its response and linearity. Several fashions and packaging have been thought of. The primary source of noise which limits the SiPM’s single photon resolution is the "dark current" price. It's originated by charge carriers thermally created in the sensitive volume and present within the conduction band and subsequently it relies on the temperature. The dependence of the darkish current single pixel rate as a perform of the temperature has been investigated using Peltier cells in order to alter and keep the temperature controlled.

Dark current charge depends also on the Vwk as proven in Fig. 3. With a view to have low rates of dark present the value of Vbias has been fastened at 1.5 V giving a working voltage Vwk of 29 V. It is evident that, if needed, it may be convenient to make use of a bias voltage regulator which mechanically compensates for temperature variations. Not all the time the pixels of the SiPM work independently from one another. Photoelectrons (p.e.) can migrate from the hit pixel to a different in a roundabout way 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 discuss chance may be obtained by the ratio double-to-single pulse rate as a perform of the temperature. The chance relies upon weakly on the temperature and the measured level of cross-talk (15-16%) is appropriate with the one reported in the datasheet. SiPM response as soon as its primary parameters and cells configuration are given.