Akimichi Taketa

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The unknown constituents of the interior of our home planet have provoked the human imagination and driven scientific exploration. We herein demonstrate that large neutrino detectors could be used in the near future to significantly improve our understanding of the Earth's inner chemical composition. Neutrinos, which are naturally produced in the(More)
K. Abe, 56 H. Aihara, 56 C. Andreopoulos, I. Anghel, A. Ariga, T. Ariga, R. Asfandiyarov, M. Askins, J.J. Back, P. Ballett, M. Barbi, G.J. Barker, G. Barr, F. Bay, P. Beltrame, V. Berardi, M. Bergevin, S. Berkman, T. Berry, S. Bhadra, F.d.M. Blaszczyk, A. Blondel, S. Bolognesi, S.B. Boyd, A. Bravar, C. Bronner, F.S. Cafagna, G. Carminati, S.L. Cartwright,(More)
Since 2007, the Telescope Array (TA) experiment, based in Utah, USA, has been observing ultra high energy cosmic rays to understand their origins. The experiment involves a surface detector (SD) array and three fluorescence detector (FD) stations. FD stations, installed surrounding the SD array, measure the air fluorescence light emitted from extensive air(More)
T.Nonaka, T.Abu-Zayyad, M.Allen, R.Azuma, J.W.Belz, D.R.Bergman, S.A.Blake, O.Brusova, R.Cady, Z.Cao, J.Chiba, M.Chikawa , I.S.Cho, H.Fujii, T.Fujii, T.Fukuda, M.Fukushima, K.Hayashi, N.Hayashida, K.Hibino, K.Honda, P.Huentemeyer, G.Hughes,D.Ikeda, N.Inoue, D.Ivanov, S.Iwamoto, C.H.Jui, K.Kadota, F.Kakimoto, H.Kang, K.Kasahara, H.Kawai, S.Kawana, E.Kido,(More)
The air fluorescence detectors (FDs) of the Telescope Array (TA) experiment have been constructed in a dessert of Utah, USA. We can measure the longitudinal developments of EASs directly with the FDs by detecting air fluorescence lights and determine the primary energies of ultra-high energy cosmic rays. In order for accurate observation and measurements of(More)
We performed photometric calibration of the PhotoMultiplier Tube (PMT) and readout electronics used for the new fluorescence detectors of the Telescope Array (TA) experiment using Rayleigh scattered photons from a pulsed nitrogen laser beam. The experimental setup, measurement procedure, and ∗Corresponding author. E-mail address:(More)
  • T . Abu - Zayyad, Ryo Aida, +131 authors Z . Zundel
  • 2012
We study the anisotropy of Ultra-High Energy Cosmic Ray (UHECR) events collected by the Telescope Array (TA) detector in the first 40 months of operation. Following earlier studies, we examine event sets with energy thresholds of 10 EeV, 40 EeV, and 57 EeV. We find that the distributions of the events in right ascension and declination are compatible with(More)
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