Jul 12 – 23, 2021
Europe/Berlin timezone

Energy spectrum and the shower maxima of cosmic rays above the knee region measured with the NICHE detectors at the TA site

Jul 14, 2021, 12:00 PM
1h 30m


Talk CRI | Cosmic Ray Indirect Discussion


Yugo Omura (Osaka City University)


The Non-Imaging CHErenkov Array (NICHE) is a low energy extension to Telescope Array (TA) using an array of closely spaced (~100 m) light collectors covering an area of ~2 square km. It is being deployed in the field-of-view of the FD for the TA Low Energy Extension (TALE) and overlaps with the TALE FD in the energy range above 2 PeV. Cosmic ray air showers with energies 1-100 PeV will be reconstructed using the Lateral Distribution of Cherenkov light from the air showers. This method allows shower energy and the maximum of shower depth (Xmax) to be determined. A prototype of the array, j-NICHE, has been making routine observations with 14 detectors since May, 2019. We will present the latest results of NICHE including the energy spectrum and the shower maximum distribution around the cosmic ray knee.

Collaboration Telescope Array
Subcategory Experimental Results

Primary author

Yugo Omura (Osaka City University)


Prof. Douglas Bergman (University of Utah) John Krizmanic (4NASA/Goddard Space Flight Center) Mr Ryosuke Tsuda (Osaka City University) Prof. Yoshiki Tsunesada (Osaka City University)

Presentation materials