A universal test platform for research and development of planar radiation detectors for use in medicine has been created having the possibility of obtaining complete information about the characteristics of the detector before creating a detecting module with specialized electronics. 5 jobs were created with the ability to perform the following work: measurement of the electrophysical characteristics of individual detectors and selected detection elements of the matrices based on the station with manual movement of microprobes; determination of the yield of suitable detector elements of matrices using a test station with automated microprobe movement and automated collection and processing of electrophysical measurement data; measurement of the energy resolution (ER) of individual silicon detectors, “scintillator-silicon photosensor” type detectors and measurement of the ER of selected matrix elements before creating a detection module with specialized electronics.

A spectrometric stand for measuring the energy resolution of unpackaged single-channel silicon planar detectors has been developed and manufactured. The developed spectrometric stand makes it possible to reject detectors with unsatisfactory spectrometric characteristics at an early stage of manufacturing the detecting modules. Also, a technique has been developed for studying the spectrometric characteristics of unpackaged silicon detectors intended for the manufacture of detecting modules for ionizing radiation for various purposes.

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В статье исследуются поперечные колебания неоднородной круглой тонкой пластины. С помощью метода возмущений получены асимптотические формулы для частот свободных колебаний пластины, толщина и модуль Юнга которой линейно зависят от радиуса. Проанализировано влияние условий закрепления края пластины на частоты и поведение частот при фиксированной массе пластины. Для низших частот колебаний пластины асимптотические результаты сравниваются с результатами конечноэлементного анализа.Ключевые слова: свободные колебания пластин, неоднородная круглая пластина, метод возмущений. * Работа выполнена при частичной финансовой поддержке РФФИ (гранты № 18-01-00832-a и 19-01-00208-a).

The use of detection modules based on a silicon planar uncooled detector and a scintillator in combination with readout electronics makes it possible to create detection complexes for spectrometric detection of X-ray and gamma radiation in various fields of research, including nuclear physics, nuclear power engineering, high-energy physics, medicine, etc. The results of a study of detection complexes with silicon detectors with an active area of 22 and 55 mm and cesium iodide scintillators doped with thallium in the energy range from 50 keV to 0.662 MeV are presented.