In A Thin film Proton Recoil spectrometer is being developed in view of ITER diagnostics. The recoil proton spectrometer consists of a thin LaBr 3 scintillating crystal (Oslash 1" times 2.5 mm) coupled to an array of 12 Silicon Photomultipliers connected in parallel. The dependence of the energy resolution on the bias voltage and the geometrical efficiency of the SiPMs has been investigated illuminating with gamma sources a similar LaBr 3 crystal (Oslash 1" times 1") coupled to two arrays of 5 and 12 elements, respectively. A resolution of less than 9% FWHM on the 137Cs 662keV peak has been obtained with the 12 elements array. Measurements to assess the LaBr 3 light yield in response to protons have been performed and presented.
Fazzi, A., Nocente, M., Tardocchi, M., Varoli, V., Gorini, G., Lorenzoli, M., et al. (2013). A large area SiPM array coupled to a LaBr 3 crystal for a TPR spectrometer. In 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC), Seoul, South Korea, 27 Oct.-2 Nov. 2013. Piscataway, NJ : IEEE [10.1109/NSSMIC.2013.6829683].
A large area SiPM array coupled to a LaBr 3 crystal for a TPR spectrometer
NOCENTE, MASSIMO;GORINI, GIUSEPPE;CAZZANIGA, CARLO
2013
Abstract
In A Thin film Proton Recoil spectrometer is being developed in view of ITER diagnostics. The recoil proton spectrometer consists of a thin LaBr 3 scintillating crystal (Oslash 1" times 2.5 mm) coupled to an array of 12 Silicon Photomultipliers connected in parallel. The dependence of the energy resolution on the bias voltage and the geometrical efficiency of the SiPMs has been investigated illuminating with gamma sources a similar LaBr 3 crystal (Oslash 1" times 1") coupled to two arrays of 5 and 12 elements, respectively. A resolution of less than 9% FWHM on the 137Cs 662keV peak has been obtained with the 12 elements array. Measurements to assess the LaBr 3 light yield in response to protons have been performed and presented.
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