Speaker
Dr
Francesco Saverio Cafagna
(INFN - Bari)
Description
The JEM-EUSO (Extreme Universe Space Observatory on-board of the
Japanese Experiment Module on the ISS) mission has the primary
scientific objective of doing astromony and astrophysics detecting
extreme energy cosmic rays (EECRs), above 10$^{20}$ eV, measuring particle
arrival directions and energies. This will extend the knowledge of the
sources, spectra and composition of the cosmic rays beyond the so
called Greisen-Zatsepin-Kusmin (GZK) cut-off, constraining the
acceleration and emission models in that energy range.
JEM-EUSO apparatus has beed designed to detect the UV photons (330-400
nm) emitted in the shower produced by the EECR interaction with the
atmosphere. Using the Earth as a target, JEM-EUSO is designed to
detect, during the five year of the planned lifetime, more than 1000
events having an energy greater than 7x10$^{19}$ eV. This will be possible
thanks to a super-wide-field of view (60 degree) telescope of about
2.5 m looking downward from the ISS to the night sky. Three fresnel
lenses will compose the optics block that will focus the UV photons
onto a focal surface, housing 4932 multi anode photomultiliers.
The JEM-EUSO mission is the joint effort of institutions from 13
countries; it is planned to be launched in the 2017, using an H2B
rocket, transferred to ISS by means of an H2 Transfer Vehicle (HTV)
and attached to the Exposure Facility of the Japanese Experiment
Module (JEM).
The detector description and design perfomances will be presented.
for the collaboration
Jem-Euso Collaboration
Primary author
Dr
Francesco Saverio Cafagna
(INFN - Bari)
