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Ce:LaBr$_3$ crystals with SiPM array readout and temperature control for the FAMU experiment at RAL

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arxiv 2003.08971 v1 pith:7IQ6JP2V submitted 2020-03-19 physics.ins-det

M.Bonesini , R.Benocci , R.Bertoni , M.Clemenza , D.Ghittori , R.Mazza , E.Vallazza , A.deBari
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A.Menegolli M.Prata M.Rossella M.Baruzzo E.Mocchiutti
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classification physics.ins-det
keywords readoutsipmtemperaturearoundarraycaencrystalslabr3
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Compact X-rays detectors made of 1/2 inch Ce:LaBr3 crystals of cubic shape with SiPM array readout have been developed for the FAMUexperiment at RIKEN-RAL, to instrument regions of difficult access. Due to the high photon yield of Ce:LaBr3 it was possible to use a simple readout scheme based on CAEN V1730 digitizers, without a dedicated amplification stage. The drift with temperature of SiPM gain was corrected by using CAEN A7885D regulated power supply chips with temperature feedback. Energy resolutions (FWHM) around 3:5% at the 137Cs peak and around 9% at the 57Co peak were obtained.

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