Begonia Design Report

CARSEN IRINA; FINAZZI LUCAS; IZRAELEVITCH FEDERICO; BARELLA MARIANO; FAR MÓNICA; GOLMAR FEDERICO; LEVY PABLO; BURRONI TOMÁS; FERREIRA CHASE TOMÁS; GOMEZ MARLASCA FERNANDO; SANCA GABRIEL

2019-07-01/2019-12-24

Electrónica

Espacio-Cargas

The objective of this project was the development of an electronic board that, as a complement to LabOSat-01, can characterize an SiPM working in DC-current mode in space. In parallel, it works as a technological demonstrator to validate the DC-DC converter which will be used in future missions as well. It also carries a second experiment, the measurement of SOI transistors as dosimeters. The main part of the design consists of two independent and redundant experiment modules for an SiPM, each of these has a DC-DC converter to power each SiPM, along with the necessary electronics for the measurements. The SiPMs are excited with an LED with varying light intensities. Apart from this, it has a temperature sensor and a selection logic that allows LabOSat-01 to control which parts of the board are functioning or in a low power stand by mode and to select which measurement is to be sent.The SiPM and LED pairs are placed inside aluminum and epoxy light-tight containers that where verified to block out all light in the visible range. The only light influx received by the SiPM is that generated by the LED. The firmware developed for this project has two test routines. The first of these is run everyday and measures the LED-current-SiPM-current experiment (II curve) and SOI tran-sistors current-voltage experiment (IV curve), besides environmental parameters. The second one runs for approximately 100 minutes (the satellite decides when it can be run) measuring the dark current, and all the related parameters.