JEM-EUSO Telescope

JEM-EUSO will locate for the first time sources of cosmic rays and will mark the historic opening of non-photonic astronomy, based upon the study of charged particles. The main scientific questions to which JEM-EUSO will have to answer are : what are the sources able to accelerate the very energetic RCUEs particles (beyond 1020 eV) ? What is the acceleration mechanism ? Is there a link between the RCUEs sources and other sources already known in the Universe ? Can we use the RCUEs as messengers to probe the cosmos ?

JEM-EUSO aims at observing giant air showers induced in the Earth's atmosphere by cosmic ultra-energetic rays (RCUE).

IRAP Responsible : Peter von Balmoos

The experiment

EUSO BALLON is both a demonstrator and the precursor of JEM-EUSO and of any space mission dedicated to the study of ultra-energetic cosmic rays. The IRAP researchers will soon test a prototype of the detection plane (PDM, consisting of multi-anode multipliers) with a Fresnel lens in space conditions : study a true background noise and observe the fluorescence photons emitted by air showers. From the stratospheric balloon, EUSO BALLON will then allow the first detection of a giant air-shower « from the above » and will open the way to space, that is to say, towards JEM-EUSO.


EUSO-BALLON is intended as a « light » balloon with a full « cycle » over three years (implementation, integration, calibration, testing, balloon flight(s), data mining). The JEM-EUSO collaboration provides the focal plane (assembled PDM), and the Fresnel lens, the integration, the ground testing and the flight(s) are realized by a team gathering IRAP and CNES members.

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