This paper describes a method for the measurement of gain and linearity of photomultipliers (PMTs). Gain and linearity are two fundamental parameters to use properly a PMT in several physics experiments. In the developed system light is laser generated and adressed to the PMT through a set of optical fibers. The data acquisition system consists in a commercial 16 channel digitizer coupled to a custom front-end board. With the chosen digitizer the system is scalable to test up to 16 PMTs, with the aid of a light distribution system and a multi-channel version of the front-end board. Data analysis is performed by a custom acquisition software. A 1.5» Hamamatsu PMT is used to validate the system.
Longhitano F., Buscemi M., Barbato F.C.T., Bonanno D.L., Bongiovanni D.G., Caruso R., et al. (2018). A laser-based system for a fast and accurate measurement of gain and linearity of photomultipliers. JOURNAL OF INSTRUMENTATION, 13(1), T01007-T01007 [10.1088/1748-0221/13/01/T01007].
A laser-based system for a fast and accurate measurement of gain and linearity of photomultipliers
Buscemi M.;
2018-01-24
Abstract
This paper describes a method for the measurement of gain and linearity of photomultipliers (PMTs). Gain and linearity are two fundamental parameters to use properly a PMT in several physics experiments. In the developed system light is laser generated and adressed to the PMT through a set of optical fibers. The data acquisition system consists in a commercial 16 channel digitizer coupled to a custom front-end board. With the chosen digitizer the system is scalable to test up to 16 PMTs, with the aid of a light distribution system and a multi-channel version of the front-end board. Data analysis is performed by a custom acquisition software. A 1.5» Hamamatsu PMT is used to validate the system.
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