Scintillation optical-electronic converter of gamma radiation based on silicon photomultiplier

Bokatyi, I.O., Korotaev, V.V., Romanova, G.E., Timofeev A.N., Ryzhova, V.A.

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Бокатый И.О., Коротаев В.В., Романова Г.Э., Тимофеев А.Н., Рыжова В.А. Сцинтилляционный оптико-электронный преобразователь гамма-излучения на основе кремниевого фотоэлектронного умножителя // Оптический журнал. 2023. Т. 90. № 7. С. 38–50. http://doi.org/10.17586/1023-5086-2023-90-07-38-50

Bokaty I.O., Korotaev V.V., Romanova G.E., Timofeev A.N., Ryzhova V.A. Scintillation optical-electronic converter of gamma radiation based on silicon photomultiplier [in Russian] // Opticheskii Zhurnal. 2023. V. 90. № 7. P. 38–50. http://doi.org/10.17586/1023-5086-2023-90-07-38-50

For citation (Journal of Optical Technology):

Ilya O. Bokatyi, Valery V. Korotaev, Galina E. Romanova, Alexander N. Timofeev, and Viktoria A. Ryzhova, "Scintillation optical-electronic converter of gamma radiation based on a silicon photomultiplier," Journal of Optical Technology. 90(7), 376-383 (2023). https://doi.org/10.1364/JOT.90.000376

Abstract:

Subject of study. Scintillation optical-electronic converter of gamma radiation based on silicon photomultiplier. Purpose of the work. Development of an optical-electronic converter of gamma radiation for personal use and operation as part of the distributed radiation monitoring systems with an increased range of linearity of the transfer characteristic and improved relative energy resolution for personal use and work as part of distributed radiation monitoring systems in the field. Method. Analysis of signal conversion processes in a scintillation optical-electronic converter of gamma radiation, computer simulation and experimental study of the converter. Main results. The optical-electronic gamma-radiation converter for personal use and work as part of the distributed radiation monitoring systems in the field was developed. A method for choosing the dimensions of the optical system for matching of a scintillation crystal and a silicon photomultiplier, as well as the type and parameters of its reflective surfaces was developed, which made it possible to increase the linearity range of the transducer transfer characteristic by increasing the uniformity of the photomultiplier irradiation. An algorithm for estimating the contribution of signal losses from photons arriving at a microcell of a silicon photomultiplier during the restoration of its sensitivity to the relative energy resolution of the converter in experimental studies of the uniformity of irradiation distribution is proposed. Practical significance. An optical-electronic converter of gamma radiation has been developed with an increased up to two times the range of linearity of the transfer characteristic with an integral nonlinearity of the energy characteristic of no more than 1% and improved by at least 10% relative energy resolution for the peak energy of 662 keV of the reference 137Cs source. The optical-electronic converter is designed for personal use and operation as part of distributed radiation monitoring systems in the field.

Keywords:

optical-electronic converter of gamma radiation, gamma spectrometer, silicon photoelectronic multiplier, scintillation crystal, energy resolution, radiation monitoring

OCIS codes: 120.0280, 230.0250, 290.5930, 040.5250, 300.6350

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