Browsing by Autor "M. Ohnishi"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • Thumbnail Image
    Item type: Item ,
    Status of the world-wide network of solar neutron telescopes in solar cycle 24
    (2009) Y. Matsubara; Y. Muraki; T. Sako; Y. Itow; T. Sakai; S. Shibata; T. Yuda; M. Ohnishi; H. Tsuchiya; Y. Katayose
    A network of solar neutron telescopes has been developed since the middle of solar cycle 22. We have detected several important solar neutron events until the end of solar cycle 23 using solar neutron telescopes, but the accumulation of more solar neutron events is indispensable to eclucidate the acceleration mechanism of high energy particles. The data of the solar magnetic field with a space resolution of 0.3 arcsec obtained by Hinode satellite will be useful to understand solar neutron events more efficiently than during the previous solar cycles. In this paper we discuss the expected scientific results obtained by the world-wide network of solar neutron telescopes during solar cycle 24.
  • Thumbnail Image
    Item type: Item ,
    The overview of the ALPACA Experiment
    (2017) M. Ohnishi; T. Asaba; K. Hibino; N. Hotta; M. Kataoka; Y. Katayose; C. Kato; K. Kawata; H. Kojima; R. Mayta
    The ALPACA experiment is a new project aimed at wide field-of-view high-sensitivity observations of high-energy cosmic rays and cosmic gamma rays, launched between Bolivia and Japan in 2016. It is composed of an 83,000 m$^2$ air shower array and a 5,400 m$^2$ underground muon detector array, on a highland at the altitude of 4,740 m, halfway up Mount Chacaltaya on the outskirts of La Paz, Bolivia.