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SUMMARY:Ultra-High-Energy Cosmic Rays and the Telescope Array Experiment
DTSTART;VALUE=DATE-TIME:20260715T010000Z
DTEND;VALUE=DATE-TIME:20260715T014500Z
DTSTAMP;VALUE=DATE-TIME:20260718T210009Z
UID:indico-contribution-8960@indico.icrr.u-tokyo.ac.jp
DESCRIPTION:Speakers: Heungsu Shin ()\nThe year 1912 marked the beginning 
 of modern astroparticle physics\, when Victor Hess discovered penetrating 
 radiation of extraterrestrial origin. Since then\, the energy frontier of 
 cosmic rays has steadily expanded. In 1962\, a primary cosmic ray with an 
 energy of about 100 EeV was observed for the first time. However\, more th
 an 60 years after that observation\, many fundamental questions about ultr
 a-high-energy cosmic rays remain unresolved.\n\nAs part of the effort to a
 ddress these questions\, the Telescope Array (TA) experiment was establish
 ed as an international collaboration in which Japanese universities and re
 search institutes\, including the Institute for Cosmic Ray Research\, have
  played an important role. Since 2008\, TA has been observing ultra-high-e
 nergy cosmic rays as the largest ultra-high-energy cosmic-ray observatory 
 in the Northern Hemisphere. In recent years\, its extension project\, TA×
 4\, has been deployed to increase the exposure at the highest energies.\n\
 nIn this talk\, I will first review the history of ultra-high-energy cosmi
 c-ray observations\, and then present recent results from the TA experimen
 t. Finally\, I will briefly introduce proposed next-generation ultra-high-
 energy cosmic-ray observatories\, such as GCOS.\n\nhttps://indico.icrr.u-t
 okyo.ac.jp/event/1254/contributions/8960/
LOCATION:Kashiwa Large Seminar Room 601 (Kashiwa)
URL:https://indico.icrr.u-tokyo.ac.jp/event/1254/contributions/8960/
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