EUSO-SPB (EUSO Super Pressure Balloon) is an experiment on board a super pressure balloon for a long duration flight. EUSO-SPB was launched at 22:50 UTC on April 24th, 2017, from the NASA balloon launch site in Wanaka (New Zealand) and landed on the South Pacific Ocean on May 7th. Data analysis is in progress.

The instrument is an updated version of the first EUSO-Balloon payload. It includes a full original JEM-EUSO PDM (photon detection module with 2304 pixels), as in EUSO-Balloon, and a Fresnel lens optical system, 1 m each side, covering a field of view of ±6 degree. An improved version of the trigger allows to catch high energy cosmic ray events. The different parts of the instrument were realized in several countries in Europe and America and in Japan. The full integration of the telescope was made in Colorado at the School of Mines. Laser tests were done at the Telescope Array site. Hang tests were performed in Palestine (Texas).

The achieved data are now analyzed to search UV pulse signatures of UHECR air showers, meteoroids, atmosphere TLEs, SQM, LSPs. Moreover, slowly varying UV light signals, as airglow and bioluminescence also over the ocean, are under study.

NASA Credit

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