The automatic gain-matching in the PIBETA CsI calorimeter - Physics > Instrumentation and DetectorsReport as inadecuate




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Abstract: Segmented electromagnetic calorimeters are used to determine both the totalenergy and direction momentum components of charged particles and photons. Atrade off is involved in selecting the degree of segmentation of thecalorimeter as the spatial and energy resolutions are affected differently.Increased number of individual detectors reduces accidental particle pile-upper detector but introduces complications related to ADC pedestals and pedestalvariations, exacerbates the effects of electronic noise and ground loops, andrequires summing and discrimination of multiple analog signals. Moreover,electromagnetic showers initiated by individual ionizing particles spread overseveral detectors. This complicates the precise gain-matching of the detectorelements which requires an iterative procedure. The PIBETA calorimeter is a240-module pure CsI non-magnetic detector optimized for detection of photonsand electrons in the energy range 5-100 MeV. We present thecomputer-controlled, automatic, in situ gain-matching procedure that wedeveloped and used routinely in several rare pion and muon decay experimentswith the PIBETA detector.



Author: E. Frlez 1, M. Bychkov 1, D. Pocanic 1 1 University of Virginia

Source: https://arxiv.org/







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