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1 Bio-Algorithms and Med-Systems

1 2014

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Calibration of photomultipliers gain used in the J-PET detector

Bednarski T., Czerwiński E., Moskal P., Białas P., Giergiel K., Kapłon Ł., Kochanowski A., Korcyl G., Kowal J., Kowalski P., Kozik T., Krzemień W., Molenda M., Moskal I., Niedźwiecki S., Pałka M., Pawlik M., Raczyński L., Rudy Z., Salabura P., Gupta-Sharma N., Silarski M., Słomski A., Smyrski J., Strzelecki A., Szymański K. J., Wiślicki W., Witkowski P., Zieliński M., Zoń N.

Bio-Algorithms and Med-Systems

2014

Vol. 10, no. 1

13--17

Photomultipliers are commonly used in commercial PET scanner as devices that convert light produced in scintillator by gamma quanta from positron-electron annihilation into electrical signal. For proper analysis of obtained electrical signal, a photomultiplier gain curve must be known, since gain can be significantly different even between photomultipliers of the same model. In this article, we describe single photoelectron method used for photomultiplier calibration applied for J-PET scanner, a novel PET detector being developed at Jagiellonian University. A description of calibration method, an example of calibration curve, and a gain of few Hamamatsu R4998 photomultipliers are presented.