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SUMMARY:UHE cosmic rays and the NUSES mission
DTSTART;VALUE=DATE-TIME:20261209T101500Z
DTEND;VALUE=DATE-TIME:20261209T114500Z
DTSTAMP;VALUE=DATE-TIME:20261001T232001Z
UID:indico-event-2215@partphys-indico.unige.ch
DESCRIPTION:The origins of ultra-high energy hadronic cosmic rays (UHECRs)
  remain an open question in astroparticle physics. Their spectrum between 
 10 PeV and 100 EeV is still affected by large statistical and systematic e
 rrors\, as well as the determination of their composition. Direct detectio
 n of UHECRs is not possible in this energy range from high-altitude balloo
 ns or space-based experiments due to the exposure limitations\; hence\, de
 tection is performed by large extensive air shower arrays extending over t
 housands of kilometres in desertic regions\, like the Pierre Auger Observa
 tory and the Telescope Array. Such detectors also proved sensitive to hori
 zontal neutrinos beyond 10 PeV\, a direction from which hadronic showers a
 re highly suppressed. Observations from space offer access to much larger 
 atmospheric volumes and could significantly increase the exposure to the h
 ighest-energy cosmic rays and neutrinos. While ambitious concepts such as 
 POEMMA require large-aperture optics and sizeable satellites\, compact ins
 truments can provide an important pathfinder for these techniques.\n\nNUSE
 S is a satellite mission currently under development hosting two payloads\
 , Zirè and Terzina. Terzina is a compact Cherenkov telescope designed to 
 observe the fast optical emission from extensive air showers near the Eart
 h's limb. It searches for downward-going showers produced by very-high-ene
 rgy cosmic rays above the limb and upward-going showers initiated by Earth
 -skimming neutrinos below it. Its focal plane is equipped with Silicon Pho
 tomultipliers (SiPMs)\, providing the fast response and sensitivity requir
 ed to detect faint\, nanosecond-scale Cherenkov signals.\n\nThis seminar p
 resents the status of the NUSES mission and of the Terzina payload\, its m
 ain design features and scientific objectives\, and simulation studies per
 formed to assess its expected performance.\n\nhttps://partphys-indico.unig
 e.ch/event/2215/
LOCATION:Ecole de physique Auditoire Stückelberg
URL:https://partphys-indico.unige.ch/event/2215/
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