1.0KMI - Nagoya Universityhttps://www.kmi.nagoya-u.ac.jp/engUltra high energy cosmic rays and LHCf data - KMI - Nagoya Universityrich600338<blockquote class="wp-embedded-content" data-secret="iEgOGYDo4A"><a href="https://www.kmi.nagoya-u.ac.jp/eng/seminar/878/">Ultra high energy cosmic rays and LHCf data</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.kmi.nagoya-u.ac.jp/eng/seminar/878/embed/#?secret=iEgOGYDo4A" width="600" height="338" title="“Ultra high energy cosmic rays and LHCf data” — KMI - Nagoya University" data-secret="iEgOGYDo4A" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
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The origins of the cosmic rays with energies above 10^18eV(UHECRs) have remained a persistent mystery for decades.To study the acceleration mechanism and find the UHECR sources, onemust make careful measurements of the energyspectrum, the composition and the arrival directions.Telescope Array (TA) is specifically designed to measure these UHECRproperties precisely.The energy spectrum showsthe “ankle” structure around 10^18.7eV.At 10^19.75eV, there is thesecond bending point where the UHECR flux startsto decrease.The composition analysis using the longitudinaldevelopment measurement shows that proton is dominantabove 10^18.2eV. …