Browsing by Autor "R. Mayta"

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ALPAQUITA Array in the ALPACA Project
(2017) K. Kawata; T. Asaba; K. Hibino; N. Hotta; M. Kataoka; Y. Katayose; C. Kato; Hironori Kojima; R. Mayta; P. Miranda
We are now proposing a new project which consists of a large air shower array (83,000 m^2) and a muon detector array (5,400 m^2) located at the altitude of 4,740 m near La Paz in Bolivia to observe 100 TeV gamma rays in the southern sky. The ALPAQUITA array is a prototype air shower array which will be constructed at the ALPACA site. This array consists of 45 scintillation counters of 1 m^2 in area each, and its effective area is approximately 8,000 m^2 (1/10 of ALPACA air shower array). In the present paper, we report on the current status and the performance of the ALPAQUITA array
Chemostratigraphic correlation of Devonian-Carboniferous sedimentary sequences at Roboré SUB-BASIN, Bolivia
(Elsevier BV, 2024) Grony Garbán; Héctor A. Ostera; R. Mayta
DIFFERENTIAL SPECTRUM OF NEUTRONS AT CHACALTAYA-BOLIVIA
(American Institute of Physics, 2009) R. Mayta; Alessandro Zanini; R. Ticona; A. Velarde; C. J. Solano Salinas; Jose A. Bellido; David Wahl; Óscar Saavedra
We describe the Neutron Spectrometer Experiment installed at Chacaltaya Cosmic Rays Observatory (68° O, 16.2° S), located in Bolivia, at 5230 m.a.s.l. This experimental system is constituted by passive detectors which register the flux of neutrons, in an energy range of 10 KeV–20 MeV. Using the unfolding code BUNTO a peak around 1 MeV of the characteristic spectrum of neutrons was obtained. Experimental values, observed during April of 2008, are compared with similar ones carried out in 1997 at the same place, in order to look for eventual changes due to local atmosphere. A similar experiment was also carried up at the Laboratory of Testa Grigia‐Italy (45.56° N, 7.42° E,. 3480 m.a.l.s). Data of both stations allow us to compare the spectra in order to explain the difference of neutron flux of these two stations.
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.