%0 Conference Proceedings
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%@resumeid 8JMKD3MGP5W/3C9JJ4U
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%3 Abstract IAU-2009_Guilherme_Grams.pdf
%B 60th International Astronautical Congress - IAU
%X Cosmic rays are high-energy particles with source in the interstellar space. When these impinge the top of the atmosphere, interact with atmospheric constituents, producing secondary particles. Among them are the muons that have a huge penetration capacity and maintain the incident direction of the primary cosmic rays. A multi-directional telescope (MDT) for detection of high-energy galactic cosmic rays (GCRs) - muons was installed in 2001 and upgraded in 2005, through an international cooperation between Brazil, Japan and USA, and operated since then at the Southern Space Observatory - SSO/CRS/INPE - MCT, (29,4ºS, 53,8ºW, 480m), Sao Martinho da Serra, RS, in the South of Brazil. This telescope is a component detector of the Global Muon Detector Network (GMDN), which has been developed in an international collaboration lead by Shinshu University, Japan. The main objective of this work is to study the directional intensity of muons, which are produced by primary cosmic rays with energy between 50 GeV and 170 GeV and observed at the Earths surface. We analyze the data collected by the muon detector telescope  MDT at the SSO in 2006 and 2007. The Telescope consists of two layers of 4x7 detectors with a total observation area of 28 square meters. The counting of muons in each directional channel is made by a coincidence of pair of pulses, one from a detector in the upper layer and the other from a detector in the lower layer. The SSOs MDT equipped with 119 directional channels for muon count rate measurement is capable of detecting muons incident with the zenith angle between 0º and 75,53º. A statistical analysis was made with the MDT muon count rate for all the directional channels. The average and the standard deviation of the muon count rate in each directional component are calculated to deduce the zenith angle dependence of the rate. Preliminary results have shown lower (higher) count rate with larger (smaller) zenith angle, as expected from the production and propagation of muons in the atmosphere.
%@mirrorrepository sid.inpe.br/mtc-m19@80/2009/08.21.17.02.53
%T Preliminary statistical study of the directional intensity of cosmic ray muons observed at the brazilian southern space observatory
%@secondarytype PRE CI
%8 August, 13-14
%@group CRS-CCR-INPE-MCT-BR
%@group CRS-CCR-INPE-MCT-BR
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%@group DGE-CEA-INPE-MCT-BR
%@group DGE-CEA-INPE-MCT-BR
%2 sid.inpe.br/mtc-m19@80/2009/12.23.22.04.56
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%4 sid.inpe.br/mtc-m19@80/2009/12.23.22.04
%D 2009
%A Grams, Guilherme,
%A Nelson Jorge Schuch,
%A Braga, Carlos Roberto,
%A Kane, Rajaram Purushottam,
%A Echer, Ezequiel,
%A Munakata, Kazuoki,
%C Rio de Janeiro, RS
%@area CEA