An instrument for measuring scintillators efficiently based on silicon photomultipliers

An instrument used for measuring multiple scintillators’ light output and energy resolution was developed. The instrument consisted of a light sensor array which was composed of 64 discrete SiPMs (Silicon Photomultipliers), a corresponding individual channel readout electronics system, and a data pr...

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Bibliographic Details
Published in:Review of scientific instruments 2016-11, Vol.87 (11), p.113308-113308
Main Authors: Yang, M. J., Zhang, Z. M., Wang, Y. J., Li, D. W., Zhou, W., Tang, H. H., Liu, Y. T., Chai, P., Shuai, L., Huang, X. C., Liu, S. Q., Zhu, M. L., Jiang, X. P., Zhang, Y. W., Li, T., Ma, B., Sun, S. F., Sun, L. Y., Wang, Q., Lu, Z. R., Zhang, T., Wei, L.
Format: Article
Language:English
Subjects:
Algorithms
Crosstalk
Data processing
Energy resolution
Measuring instruments
Performance evaluation
Photomultiplier tubes
Polytetrafluoroethylene
Scientific apparatus & instruments
Scintillation counters
Sensor arrays
Silicon
Technology assessment
Temperature dependence
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Summary:An instrument used for measuring multiple scintillators’ light output and energy resolution was developed. The instrument consisted of a light sensor array which was composed of 64 discrete SiPMs (Silicon Photomultipliers), a corresponding individual channel readout electronics system, and a data processing algorithm. A Teflon grid and a large interval between adjacent SiPMs were employed to eliminate the optical cross talk among scintillators. The scintillators’ light output was obtained by comparing with a reference sample with known light output. Given the SiPM temperature dependency and the difference among each SiPM, a temperature offset correction algorithm and a non-uniformity correction algorithm were added to the instrument. A positioning algorithm, based on nine points, was designed to evaluate the performance of a scintillator array. Tests were performed to evaluate the instrument’s performance. The uniformity of 64 channels for light output measurement was better than 98%, the stability was better than 98% when temperature varied from 15 °C to 40 °C, and the nonlinearity under 511 keV was better than 2%. This instrument was capable of selecting scintillators and evaluating the packaging technology of scintillator arrays with high efficiency and accuracy.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4968563