Browsing by Autor "R. Ticona"

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Análisis de la radiación gamma de UAE en el hemisferio sur
(1995) R. Ticona; I. Poma; K. Honda; I. Tsushima; N Kawazumi; K. Hashimoto; T. Matano
Analysis of Background Cosmic Ray Rate in the 2010-2012 Period from the LAGO-Chacaltaya Detectors
(2016) C. Sarmiento‐Cano; Luis Arturo Nuñez-Castiñeyra; H. Asorey; Luis A. Núñez; Pedro Miranda; C. J. Solano Salinas; R. Ticona
The Latin American Giant Observatory (LAGO) is an extended Cosmic Rays observatory composed by a network of Cherenkov Detectors (WCDs) spread over Latin America. This work will report the analysis of three years of data from three LAGO WCD located in Cerro Chacaltaya, Bolivia, at 5200 m a.s.l. Background cosmic ray rate from these detectors is checked for DAQ issues and inconsistencies, and corrected for atmospheric effects. An analysis for short transients up to the minute timescale is performed, in search for coincidence with transients observed by satellites. Sidereal and solar long term epoch data analysis are also presented.
Búsqueda de radiación gamma de alta energía en el hemisferio sud
(1999) R Bustos; R. Ticona; N Marticic; K. Choque
Cálculo del coeficiente barométrico del 12-NM64 en el monte Chacaltaya
(1998) R. Ticona; Angel León Coloma Carrasco; O Burgoa
CHAOTIC PROPERTIES OF HIGH ENERGY COSMIC RAYS
(2006) A. Ticona; R. Ticona; N. Martinić; I. Poma; R. Gutiérrez–Sánchez; R. de la Calle; E. Rodrı́guez
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.
Effects of the May 10, 2024 Solar Storm on the South Atlantic Anomaly: A Case Study in Bolivia
(2025) C. A. H. Condori; R. Ticona; P. Miranda; C. A. Guerrero; E. Romero‐Hernández; E. Peréz‐Tijerina; R. Raljevic; M. Subieta-Vázquez
<title>Abstract</title> We analyzed the strongest geomagnetic storm of the past two decades, which occurred on May 10, 2024, focusing on plasma data from spacecraft, Earth's magnetic field variations recorded at the Villa Remedios Magnetic Observatory, and neutron data from the 12-NM64 monitor, both located in La Paz, Bolivia. Situated within the South Atlantic Magnetic Anomaly (SAA), this region offers a unique perspective on geomagnetic disturbances, emphasizing the relevance of localized studies. The Villa Remedios Magnetic Observatory recorded a Dst drop of -560 nT, significantly larger than the -412 nT reported by the Kyoto station, underscoring pronounced regional variations likely amplified by SAA's influence. Concurrently, the neutron monitor at Chacaltaya registered a Forbush decrease on May 10, linked to coronal mass ejections (CMEs) and solar flares that occurred on May 8. This decrease was followed by a prolonged 13-day recovery, mirroring patterns observed in the Dst index. The combined data highlight the intricate interplay between solar activity and its terrestrial impacts, revealing significant correlations among CMEs, solar wind velocity, proton and electron fluxes, and geomagnetic disturbances. What did we learn from this geomagnetic storm? The importance of considering the geographical location and magnetic environment when analyzing such phenomena.
Estudio de fuentes de radiación gamma de UAE en el hemisferio sur
(1996) R. Ticona; A Burgoa; I. Poma
Fractality in high energy cosmic rays
(Elsevier BV, 2003) N. Martinić; R. Ticona; I. Poma; F. Osco; René Gutierrez
PROYECTO LAGO BOLIVIA
(2009) A. Velarde; R. Ticona; Perales Miranda; H. Rivera; Janneth M. Quispe
Simultaneous observation at sea level and at 5200 m.a.s.l. of high energy particles in the South Atlantic Anomaly
(Elsevier BV, 2010) C. R. A. Augusto; C. E. Navia; K. H. Tsui; H. Shigueoka; P. Miranda; R. Ticona; A. Velarde; O. Saavedra
Solar neutron events in association with large solar flares in November 2003
(Elsevier BV, 2005) K. Watanabe; Y. Muraki; Y. Matsubara; Kazuaki Murakami; T. Sako; P. Miranda; R. Ticona; A. Velarde; F. Kakimoto; S. Ogio