KEYWORDS: Data acquisition, Software development, Cameras, Interfaces, Data storage, Control systems, Sensors, Photodiodes, Electronics, Field programmable gate arrays
We present the data acquisition and control software for the operation of the Mini-Extreme Universe Space Observatory (EUSO), a space-based fluorescence telescope for the observation of extensive air showers and atmospheric phenomena. This framework has been extensively tested alongside the development of Mini-EUSO and was finalized ahead of the successful launch of the instrument to the ISS on August 22, 2019. The data acquisition, housekeeping, and subsystem control is achieved using custom-designed front-end electronics based on a Xilinx Zynq XC7Z030 chip interfaced with a PCIe/104 CPU module via the integrated Zynq processing system. The instrument control interface is handled using an object-oriented C++ design, which can be run both autonomously and interactively as required. Although developed for Mini-EUSO, the modular design of both the software and hardware can easily be scaled up to larger instrument designs and adapted to different subsystem and communication requirements. As such, this framework will also be used in the upgrade of the EUSO-TA instrument and potentially for the next EUSO-SPB2 NASA Balloon flight. The software and firmware presented are open source and released with detailed and integrated documentation.
Idea of ultrahigh cosmic rays (UHECR) measurement from satellites was suggested by Linsley in 1981 and since
has being developed into projects of cosmic rays telescopes for International Space Station (ISS): JEM-EUSO -
to be installed on the Japanese experimental module and KLYPVE - on the Russian ISS segment. A series of
space-based detectors for measurements of background phenomena in those telescopes were developed in Russia
(Universitetsky-Tatiana, Universitetsky-Tatiana-2 , Chibis satellites). The satellite Lomonosov with UHECR
detector TUS on its board will be launched in 2013. TUS contains multi-channel photo receiver and Fresnel-type
mirror manufactured with use of special multi-layer carbon plastic technology in RSC “Energia". In this paper
one and two component optical systems with 360 cm entrance diameter and 400 cm focal distance for wide angle
detector KLYPVE are studied. In one component case using generalized Davies-Cotton systems (Fresnel-type
mirror with ellipsoidal gross surface) it is possible to obtain 8-10° field of view (FoV) with focal spot size less
than pixel size equal to 15 x 15 mm. In two component system (parabolic mirror and a Fresnel lens, mounted
close to photo receiver) it is possible to increase FoV up to 10-12° and significantly simplify the primary mirror
construction.
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