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3 March 2003 UV and optical characterization of the EUSO focal plane detectors
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Abstract
The Extreme Universe Space Observatory (EUSO) is an international program recently approved by ESA for accommodation on the International Space Station. The aim of this telescope is to detect the very rare ultra-high-energy cosmic ray events looking downward the Earth atmosphere from the Space Station. The interaction between these cosmic rays and nitrogen molecules in the atmosphere produces fluorescence radiation in the ultraviolet, in the region ranging from 300 nm up to 400 nm. This radiation is collected by Fresnel lenses onto a focal plane detector composed of about 5000 Multi-Anodes Photomultiplier tubes (MAPMT) providing 2 × 105 4-mm2 pixels. The phase A of this complex program started in March 2002 and it will last one year. During this period the MAPMTs will be fully tested and characterized in the UV region of interest and the focal plane architecture will be designed taking into account the constraints given by the optical design and the results from tests. The test measurements will give information on the response, by changing parameters such as the incidence angle, the gain, the dinode biasing. Ageing effects will be also evaluated. This paper reports on the results of UV measurements on MAPMT obtained at the INFN in Florence, Italy, and it presents the concept study of the UV filter system and the evaluation of a new compact light collector/filter device to be coupled with the detector.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Emanuele Pace, Gianni Corti, and Piero Mazzinghi "UV and optical characterization of the EUSO focal plane detectors", Proc. SPIE 4858, Particle Astrophysics Instrumentation, (3 March 2003); https://doi.org/10.1117/12.458550
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