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Dive into the research topics where Nobuhiro Sakaki is active.

Publication


Featured researches published by Nobuhiro Sakaki.


International Journal of Modern Physics A | 2005

Photomultiplier development and wavelength shifter manufacturing to increase the detection of faint fluorescence signals

Mario Edoardo Bertaina; Toshikazu Ebisuzaki; K. Hirota; Yoshiya Kawasaki; Nobuhiro Sakaki; M. Sato; Hirohiko M. Shimizu; T. Shinohara; Yoshiyuki Takizawa

RIKEN has developed in collaboration with Hamamatsu a new type of Multi Anode Photomultiplier (MAPMT), R8900 series, with a large sensitive area of ~ 83% of the physical surface. The performance of R8900 is reviewed in the following. RIKEN has also manufactured a new type of wavelength shifter (w.s.) film to shift near-UV light (330 ÷ 400 nm) to visible one. This film uses POPOP as a shifter and EPO-TEX as a substrate. The quantum efficiency of the film reaches ~ 80%.


Archive | 2008

Balloon-borne measurement of UV nightglow and clouds for the JEM-EUSO mission

Nobuhiro Sakaki; Yoshiyuki Takizawa; Yoshiya Kawasaki; E. Al


Archive | 2003

Propagation of Ultra-High Energy Nucleus in the Intergalactic Photon Field

Tetsuya Yamamoto; Kenichi Mase; M. Takeda; Nobuhiro Sakaki; M. Teshima


Archive | 2001

Anisotropy of cosmic-ray arrival direction at 1018eV observed by AGASA

M. Teshima; M. Chikawa; M. Fukushima; N. Hayashida; Kohei Honda; N. Inoue; Kenichi Kadota; F. Kakimoto; Shigeyuki Kakizawa; Keigo Kamata; S. Kawaguchi; S. Kawakami; Y. Kawasaki; Norio Kawasumi; E. Kusano; A. M. Mahrous; Kenichi Mase; Taisuke Minagawa; Y. Morizane; M. Nagano; H. Ohoka; Satoko Osone; Nobuhiro Sakaki; Makoto Sasaki; Masaki Sasano; Kenji Shinozaki; M. Takeda; R. Torii; Itsuro Tsushima; Yukio Uchihori


NUCL PHYS B-PROC SUPPL | 1998

Recent results from the AGASA experiment

N. Hayashida; Kohei Honda; N. Inoue; Kenichi Kadota; F. Kakimoto; Keigo Kamata; S. Kawaguchi; Y. Kawasaki; Norio Kawasumi; Hidemitsu Kitamura; E. Kusano; Y. Matsubara; Kazuaki Murakami; Motohiko Nagano; D. Nishikawa; H. Ohoka; Nobuhiro Sakaki; Makoto Sasaki; Kenji Shinozaki; N. Souma; M. Takeda; M. Teshima; R. Torii; Itsuro Tsushima; Yukio Uchihori; Tetsuya Yamamoto; Shuhei Yoshida; H. Yoshii


Archive | 2007

Instrument Overview of the JEM-EUSO Mission

Fumiyoshi Kajino; I.H. Park; Naoya Inoue; B. Khrenov; M. Teshima; O. Catalano; A. Santangelo; Toshikazu Ebisuzaki; G. Medina-Tanco; L. Tkachev; V. Mitev; Yoshiyuki Takizawa; Nobuhiro Sakaki; H. Mase; J. Adams; Y. Takahashi; P. Gorodetzky; Yoshiya Kawasaki; Hirokazu Ikeda; Mario E. Bertaina; Mitsuteru Sato; P. Picozza


Archive | 2005

Characteristics of Multi-Anode PhotoMultiplier Tube for the EUSO Focal Surface Detector

Yoshiya Kawasaki; Mario E. Bertaina; Nobuhiro Sakaki; Makiko Sato; Hirohiko M. Shimizu; Yoshiyuki Takizawa; Yukio Uchihori; N. Inoe; Iwao Ohtsu; Keita Inoue; Toshiyukj Sawabe; Fumiyoshi Kajino


Archive | 2001

Properties of EHE gamma-ray initiated air showers and their search by AGASA

Kenji Shinozaki; M. Chikawa; M. Fukushima; N. Hayashida; Kohei Honda; N. Inoue; Kenichi Kadota; F. Kakimoto; Shigeyuki Kakizawa; Keigo Kamata; S. Kawaguchi; S. Kawakami; Y. Kawasaki; Norio Kawasumi; E. Kusano; A. M. Mahrous; Kenichi Mase; Taisuke Minagawa; Y. Morizane; Motohiko Nagano; H. Ohoka; Satoko Osone; Nobuhiro Sakaki; Makoto Sasaki; Masaki Sasano; M. Takeda; M. Teshima; R. Torii; Itsuro Tsushima; Yukio Uchihori


Archive | 2001

Energy spectrum above 3 x 1018 EV observed with AGASA

M. Chikawa; M. Fukushima; N. Hayashida; Kohei Honda; N. Inoue; Kenichi Kadota; F. Kakimoto; Shigeyuki Kakizawa; Keigo Kamata; S. Kawaguchi; S. Kawakami; Y. Kawasaki; Norio Kawasumi; E. Kusano; A. M. Mahrous; Kenichi Mase; Taisuke Minagawa; Y. Morizane; Motohiko Nagano; H. Ohoka; Satoko Osone; Nobuhiro Sakaki; Makoto Sasaki; Masaki Sasano; Kenji Shinozaki; M. Takeda; M. Teshima; R. Torii; Itsuro Tsushima; Yukio Uchihori


Archive | 2001

Fluorescence efficiency of electrons in the atmosphere above the ocean

M. Nagano; Keizo Kobayakawa; Akira Masaike; Nobuhiro Sakaki

Collaboration


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F. Kakimoto

Tokyo Institute of Technology

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Yukio Uchihori

National Institute of Radiological Sciences

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Kazuaki Murakami

Nagoya University of Foreign Studies

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