Welcome To Guard Patrol Products
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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 itagpro item tracker designing a precision tracking system to be positioned inside a free magnetized quantity for the cost identification of low energy crossing particles. The devised system is demonstrated ready to provide a spatial resolution higher than 2 mm. Scintillators, Photon Solid State detector, particle tracking units. Among the planned activities was the development of a mild spectrometer seated in a 20-30 m3 magnetized air volume, the Air Core Magnet (ACM). The entire design should be optimised for the willpower of the momentum and charge of muons within the 0.5 - 5 GeV/c vary (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 here demonstrated in a position to provide the necessary spatial decision in reconstructing the place of the crossing particle by profiting of the cost-sharing between adjacent bars readout in analog mode. SiPMs are excellent candidates in replacing customary photomultipliers in lots of experimental circumstances. Tests have been performed with laser beam pulses and radioactive source so as to characterize the scintillator bar response and SiPM behaviour. Here we briefly current the observed behaviour of the SiPM utilized in our tests relating to the primary sources of noise and the impact of temperature on its response and linearity. Several fashions and packaging have been thought of. The principle source of noise which limits the SiPM’s single photon resolution is the "dark current" fee. It's originated by charge carriers thermally created within the sensitive volume and present in the conduction band and subsequently it is dependent upon the temperature. The dependence of the darkish current single pixel price as a perform of the temperature has been investigated utilizing Peltier cells so as to change and keep the temperature managed.
Dark present fee depends also on the Vwk as proven in Fig. 3. With a purpose to have low charges of darkish current the worth of Vbias has been mounted at 1.5 V giving a working voltage Vwk of 29 V. It is clear that, if necessary, it may be convenient to use a bias voltage regulator which robotically compensates for temperature variations. Not all the time the pixels of the SiPM work independently from each other. Photoelectrons (p.e.) can migrate from the hit pixel to another not directly fired by a photon. Optical cross-talk between pixels results in a non-Poissonian behaviour of the distribution of fired pixels. An estimate of the optical cross discuss chance can be obtained by the ratio double-to-single pulse charge as a perform of the temperature. The likelihood relies upon weakly on the temperature and the measured degree of cross-talk (15-16%) is compatible with the one reported within the datasheet. SiPM response as soon as its fundamental parameters and cells configuration are given.