The Mini-EUSO space experiment ("UV atmosphere" in Russian Space Program) is a telescope designed to perform observations of night-time Earth in the UV spectrum. The instrument comprises a compact ...

/pdf/science-of-mini-euso-detector-on-board-the-international-wjbw9swvmd.pdf

Science of Mini-EUSO detector on board the International Space Station

Mini-EUSO (Extreme Universe Space Observatory) is a small-scale prototype cosmic-ray detector that will measure Earth‘s UV emission and other atmospheric phenomena from space. It will be placed in the International Space Station (ISS) behind a UV transparent window looking to the nadir. The launch is planned this year (2019). Consisting of a multi-anode photomultiplier (MAPMT) camera and a 25 cm diameter Fresnel lens system, Mini EUSO has a 44° field of view (FoV), a 6.5 km² spatial resolution on the ground and a 2.5 ms temporal resolution. In principle, Mini-EUSO will be sensitive to extensive air shower (EAS) from cosmic-rays with energies above 1021 eV.
A mobile, steerable UV laser system will be used to test the expected energy threshold and performance of Mini-EUSO. The laser system will be driven to remote locations in the Western US and aimed across the field of view of Mini-EUSO when the ISS passes overhead during dark nights. It will emit pulsed 355 nm UV laser light to produce a short speed-of-light track in the detector. The brightness of this track will be similar to the track from an EAS resulting from a cosmic-ray of up to 1021 eV. The laser energy is selectable with a maximum of around 90 mJ per pulse. The energy calibration factor is stable within 5 %. The characteristics of the laser system and Mini-EUSO have been implemented inside the JEM-EUSO OffLine software framework, and laser simulation studies are ongoing to determine the best way to perform a field measurement.

/pdf/uv-laser-system-test-of-mini-euso-1o5fz3qr9x.pdf

UV Laser System Test of Mini-EUSO

Mini-EUSO (Extreme Universe Space Observatory) is a small-scale prototype cosmic-ray detector that will measure Earth`s UV emission and other atmospheric phenomena from space. It will be placed in the International Space Station (ISS) behind a UV-transparent window looking to the nadir. The launch is planned this year (2019). Consisting of a multi-anode photomultiplier (MAPMT) camera and a $25$ cm diameter Fresnel lens system, Mini-EUSO has a \ang{44} field of view (FoV), a $6.5$ km$^2$ spatial resolution on the ground and a $2.5\ \mu$s temporal resolution. In principle, Mini-EUSO will be sensitive to extensive air shower (EAS) from cosmic-rays with energies above $10^{21}$ eV. A mobile, steerable UV laser system will be used to test the expected energy threshold and performance of Mini-EUSO. The laser system will be driven to remote locations in the Western US and aimed across the field of view of Mini-EUSO when the ISS passes overhead during dark nights. It will emit pulsed $355$ nm UV laser light to produce a short speed-of-light track in the detector. The brightness of this track will be similar to the track from an EAS resulting from a cosmic-ray of up to $10^{21}$ eV. The laser energy is selectable with a maximum of around $90$ mJ per pulse. The energy calibration factor is stable within $5\ \% $. The characteristics of the laser system and Mini-EUSO have been implemented inside the JEM-EUSO OffLine software framework, and laser simulation studies are ongoing to determine the best way to perform a field measurement.

Laser test with Mini-EUSO

The Mini-EUSO instrument is an UV telescope to be placed aboard the International Space Sta-tion (ISS) in the framework of the JEM-EUSO project. Mini-EUSO will map the Earth in the UV range (300 - 400 nm) with a spatial resolution of 5 km and a temporal resolution of 2.5 μs.
Therefore, Mini-EUSO offers an excellent opportunity to study a variety of physics phenomena such as transient luminous events and meteors, as well as searching for strange quark matter and test the detection of space debris. Mini-EUSO will serve also as a pathfinder for the study of Extreme Energy Cosmic Rays from space. A review on the expected performance of Mini-EUSO in detecting a variety of physical phenomena simulated with the EUSO Simulation and Analysis Framework (ESAF) package is described.

/pdf/simulations-of-mini-euso-observations-of-uv-phenomena-in-the-5c11qma9bf.pdf

Simulations of mini-EUSO observations of UV phenomena in the atmosphere

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Simulations of mini-EUSO observations of UV phenomena in the atmosphere