학술논문
Performance of the COMPASS II shashlyk calorimeter ECAL0 read out by SiPMs.
Document Type
Article
Author
Source
Subject
*CALORIMETERS
*PIXELS
*ELECTRIC capacity
*ELECTRONS
*PERFORMANCES
*DENSITY
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Language
ISSN
0168-9002
Abstract
The matrix of 3 × 3 modules of the EM calorimeter ECAL0 (COMPASS II) read out by MPPC S12572-010P SiPMs with the pixel density of 104 mm−2 and an area of 3 × 3 mm2 is studied in the range of electron energies 1–30 GeV. It is observed that the MPPC has additional response nonlinearity and a significantly smaller dynamic range of output signals than expected. The influence of parasitic capacitance between pixels on the pixel gain is discussed and proposed as explanation. The energy resolution of the calorimeter is measured to be σ E ∕ E = 7. 1 % (1 + 0. 06 ∕ E) ∕ E ⨁ 1. 4 % E 0. 25 , where electron energy E is given in GeV. • New-generation shashlyk calorimeter read out by SiPMs is studied with test beams. • High-pixel-density SiPM MPPC S12572-10 has additional response nonlinearity. • Influence of parasitic capacitance between pixels on the pixel gain is discussed. • Energy resolution of the calorimeter is measured and parameterized. [ABSTRACT FROM AUTHOR]