Sofia_SIRAD_LAZIO

Sofia_SIRAD The first variant of apparatus Sofia_SIRAD for on board of ISS investigations mechanical structure was design; The first variant of apparatus Sofia_SIRAD for on board of ISS investigations mechanical structure was design; The prototype of small size power supply for space instrument operating on the Russian Segment of ISS was produced; The prototype of small size power supply for space instrument operating on the Russian Segment of ISS was produced; The trigger system on base of plastic scintillation counters as mechanical design as electronic scheme was developed and produced; The trigger system on base of plastic scintillation counters as mechanical design as electronic scheme was developed and produced; Preliminary software algorithms was developed; Preliminary software algorithms was developed;

The prototypes of small size power supply and trigger system

Small size power supply for operating on the Russian Segment of ISS 3 plastic scintillation counters Electronics of trigger system PC-104 tower AC/DC converter for ground work

LAZIO The mechanical structure design of apparatus LAZIO detectors for investigations on board of ISS was developed; The mechanical structure design of apparatus LAZIO detectors for investigations on board of ISS was developed; The small dimension power supply for LAZIO detectors was developed The small dimension power supply for LAZIO detectors was developed Three scintillation detectors on base of photomultipliers HP6780 and front-end electronics was developed; Three scintillation detectors on base of photomultipliers HP6780 and front-end electronics was developed; Two scintillation detectors on base of photodiodes (SiPM) and front-end electronics was developed; Two scintillation detectors on base of photodiodes (SiPM) and front-end electronics was developed; The trigger system of apparatus LAZIO was developed; The trigger system of apparatus LAZIO was developed; 16 tiles (plastic scintillator+shifter and photodiode) was produced 16 tiles (plastic scintillator+shifter and photodiode) was produced

Apparatus LAZIO

Design of LAZIO scintillation detectors SC1&3+SiPM H Area of mechanical connection Distributor board A View A SC1&3+SiPM Tiles

SiPM Silicon Photomultiplier (SiPM) The SiPM consists of the array (matrix) of p-n-junctions (~103 mm -2 ) joint together on a common silicon substrate. Each p-n-junction working in limited Geiger mode with a gain 106, but SiPM in whole is analogue detector, because the SiPM output signal is a sum of the signals from p-n-junctions fired by photons Comparison of characteristics vacuum and SiPM CharacteristicsPMSiPM 1.Efficeincy % 470 nm 590 nm 670 nm < Gain factor Noise-factor1, Threshold sensitivity (S/N) Time jitter, psec~ Bias voltage Volts

SiPM + Plastic scintillator = Tile Tile: Plastic scintillator 3x3x0.5 cm 3 Shifter SiPM