Nagoya University: Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI)

Nagoya University

Japanese


KMI Topics
"Nuclear emulsion and its scanning"
Toshiyuki Nakano
(KMI, Nagoya University)
April 15, 2015 (Wed) 17:30-
KMI Science Symposia (ES635)
Abstract:

Recently, the OPERA experiment has reported a 4.2sigma evidence for nu_mu -> nu_tau oscillations in appearance mode. This experiment was performed by using 9 million nuclear emulsion films, of which dimension is 4x5 inches, since nuclear emulsion was the almost only detector to identify tau neutrino interactions. Nuclear emulsion is a true 3-dimensional tracking detector with sub-micron spatial resolution. However only a percent of nuclear emulsion was scanned in the OPERA experiment due to the slow speed of the nuclear emulsion read-out systems. Now we developed a new generation of nuclear emulsion scanning system 'HTS'. One of the goal of HTS is 2 orders of magnitude faster than previous systems. The nuclear emulsion films of the 2nd flight of GRAINE project, which is a balloon borne high resolution gamma-ray telescope with nuclear emulsion, will be scanned by HTS as commissioning this May.

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