Test and characterisation of SiPMs for the MEGII high resolution Timing Counter

• Published in: Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Vol. 824; pp. 145 - 147
• Main Authors: Simonetta, M., Biasotti, M., Boca, G., Cattaneo, P.W., De Gerone, M., Gatti, F., Nardò, R., Nishimura, M., Ootani, W., Pizzigoni, G., Prata, M.C., Rossella, M., Shibata, N., Uchiyama, Y., Yoshida, K.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 11-07-2016
• Subjects: Accelerators; Arrays; Electric potential; Gain; High resolution Timing Counter; Pixels; Positrons; Silicon photomultiplier; SiPM; Time measurements; Voltage; SiPM; Silicon photomultiplier; High resolution Timing Counter
• ISSN: 0168-9002; 1872-9576
• DOI: 10.1016/j.nima.2015.11.023

The MEGII Timing Counter will measure the positron time of arrival with a resolution of ~ 30ps relying on two arrays of scintillator pixels read out by 6144 Silicon Photomultipliers (SiPMs) from AdvanSiD. They are characterised, measuring their breakdown voltage, to assure that the gains of the SiPMs of each pixel are as uniform as possible, to maximise the pixel resolution. Gain measurements have also been performed.
•Characterisation of SiPMs for MEG-II Timing Counter is illustrated.•SiPMs breakdown voltage and gain measurement are reported.•The criterion for the choice of each single pixel SiPMs is explained.