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In this paper, we introduce a laboratory prototype of a solar energeticparticle (SEP) detector which will operate along with other space-basedinstruments to give us more insight into the SEP physics. The instrument isdesigned to detect protons and electrons with kinetic energies from 10 to 100MeV and from 1 to 10 MeV respectively. The detector is based on a scintillationcylinder divided into separated disks to get more information about detectedparticles. Scintillation light from isolated segments is collected by opticalfibers and registered with silicon photo-multipliers (SiPM). The work containsthe result of laboratory testing of the detector prototype. The detectorchannels were calibrated, energy resolution for every channel was obtained.Moreover, we present an advanced integral data acquisition and analysistechnique based on Bayesian statistics, which will allow operation even duringSEP events with very large fluxes.  The work is motivated by the need for better measurement tools to studyacceleration and transport of SEP in the heliosphere as well as by the need forthe monitoring tool to mitigate radiation hazard for equipment and people inspace.

Prototype of a segmented scintillator detector for particle flux measurements on spacecraft