Analog frontend for signal processing for MCA based on STM32 microcontroller

Abstract This paper presents the design and implementation of an analog signal processing front-end board for a multichannel analyzer (MCA) based on the STM32 microcontroller. The board utilizes commercially available electronic components and is capable of processing both fast signals from various scintillation materials and longer signals from pre-amplifiers used with silicon detectors. Energy spectra were recorded for an alpha source (Ra-226) using a silicon detector and a CsI(Tl) scintillator, as well as for a gamma source (Cs-137) using a NaI(Tl) scintillator coupled with a photomultiplier tube. The measurement results demonstrate that the developed analog front-end, combined with the STM32-based MCA, is suitable for alpha and gamma spectrometry applications.