Mini-EUSO optics design and tests

Takizawa, Y.; Kasuga, Hiroshi; Ohmori, Hitoshi; Casolino, M.; Ebisuzaki, Toshikazu

doi:10.22323/1.301.0367

Cited by 8 publications

(8 citation statements)

References 4 publications

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“…The optics simulation is performed through the simulator developed in RIKEN [6] or a parametrical simulator. In the latter case, the position of the spot on the focal surface is parametrized in analytical way as a function of the entrance angle.…”

Section: The Simulation Frameworkmentioning

confidence: 99%

Simulations for the JEM-EUSO program with ESAF

Fenu¹,

Shinozaki²,

Miyamoto³

et al. 2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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Section: The Simulation Frameworkmentioning

confidence: 99%

Simulations for the JEM-EUSO program with ESAF

Fenu¹,

Shinozaki²,

Miyamoto³

et al. 2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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“…Mini-EUSO is raising the Technology Readiness Level (TRL) of the JEM-EUSO instrumentation. One of the technological objectives is the use of Fresnel lenses in space [13,14,15]. The lenses are 10 mm thick, and they have a 25 cm diameter, which is quite thin and suits well to the needs and requirements of a space based experiment by being light and compact.…”

Section: Mini-eusomentioning

confidence: 99%

UV Laser System Test of Mini-EUSO

Kungel¹,

Bertaina²,

Bisconti³

et al. 2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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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 km 2 spatial resolution on the ground and a 2.5 µs 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.

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“…The Mini-EUSO instrument (Figure 3) comprises a compact telescope with a large field of view (±22 • ), based on an optical system employing two 25 cm diameter Fresnel lenses (focal length 30 cm) for increased light collection [24]. The UV light is focused onto one PDM module and stored on on-board disks.…”

Section: Mini-eusomentioning

confidence: 99%

The EUSO program to study UHECR from space: status and perspectives.

Casolino¹

2017

Proceedings of 35th International Cosmic Ray Conference — PoS(ICRC2017)

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The study of Ultra High Energy Cosmic Rays (UHECRs) offers unique possibilities to probe the energies currently inaccessible by man-made accelerators. The last years have shed light on several characteristics of these particles, but-due to their extremely low flux-their origin, nature and acceleration mechanisms are still unclear. Space-based observations have a potential for a large increase in statistics and capability to cover the whole sky, allowing for a direct comparison of spectra and direction of arrival from different regions and sources. Even a relatively small detector, with the exposure of a few times that of Auger, would be able to clarify the differences between the Northern and Southern sky, confirm the existence of TA hot spot, and measure multipolar anisotropies with high precision. To achieve this goal within the constraints of power, mass, size and bandwidth of space detectors, a number of novel technologies-from optics to sensors, front-end and read-out electronics-have been developed over the years. Several scaled versions of a large area space-borne telescope have been built: in August 2014 a balloon flight (EUSO-BALLOON) was successfully launched from Timmins (CA); since February 2015 a ground based detector (EUSO-TA) has been operating at the Telescope Array site in Utah. In 2017 a Super Pressure Balloon (EUSO-SPB) flew from Wanaka, New Zealand. In parallel, a series of missions have been realized by the Moscow State University to study the UV background and transient phenomena from night-time Earth: the Tatiana-1 and-2, Vernon, and TUS satellite-borne detectors. The next steps of the JEM-EUSO program include: a) MINI-EUSO-a detector to be placed inside the International Space Station (2017); b) A second SPB flght, c) K-EUSO-the first reflector based mission to perform UHECR science from space, paving the way to d) POEMMA, a Multi-Messenger devoted mission. In this work we discuss the current status of research and plans of the JEM-EUSO program.

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Mini-EUSO optics design and tests

Cited by 8 publications

References 4 publications

Simulations for the JEM-EUSO program with ESAF

Simulations for the JEM-EUSO program with ESAF

UV Laser System Test of Mini-EUSO

The EUSO program to study UHECR from space: status and perspectives.

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