22 documents found, page 1 of 3
Muography in the university and in the museum
Afonso, L.; Alexandre, I.; Andringa, S.; Assis, P.; Blanco, O.; Bezzeghoud, M.; Borges, J.; Caldeira, B.; Cazon, L.; Costa, J.; Dobrilla, P.; Duarte, M.The LouMu team joins together specialists in particle detectors and in cosmic ray analyses, geophysicists and science communicators to muograph an underground gallery of an old mine, now open to visitors of a science museum. The muon telescope is made of Resistive Plate Chambers (RPCs) developed to operate stably and with low consumption at remote locations, and it has been tested in the Coimbra University, bef...
Muography for Underground Geological Surveys: Ongoing Application at the Lousal...
Teixeira, P.; Afonso, L.; Andringa, S.; Assis, P.; Bezzeghoud, M.; Blanco, A.; Borges, J. F.; Caldeira, B.; Cazon, L.; Dobrilla, P.; Lopes, L.The use of muons for geophysical surveys has been proved successful in numerous projects around the planet. The use of muography in an underground environment has an easy side, when compared to the surface, due to the absence of the background radiation. On the other hand, the muon flux is much lower than what is measured on the surface. Geological and underground conditions should be considered when defining t...
Studies on the response of a water-Cherenkov detector of the Pierre Auger Obser...
Aab, A.; Abreu, P.; Aglietta, M.; Albury, J.M.; Allekotte, I.; Almela, A.; Castillo, J. Alvarez; Alvarez-Muñiz, J.; Batista, R. Alves; Anastasi, G.A.
MARTA: a high-energy cosmic-ray detector concept for high-accuracy muon measure...
Abreu, P. et al. (45 authors); Andringa, S.; Assis, P.; Blanco, A.; Brogueira, P; Carolino, N.; Cazon, L.; Conceição, R.; Cunha, O; Diogo, F.A new concept for the direct measurement of muons in air showers is presented. The concept is based on resistive plate chambers (RPCs), which can directly measure muons with very good space and time resolution. The muon detector is shielded by placing it under another detector able to absorb and measure the electromagnetic component of the showers such as a water-Cherenkov detector, commonly used in air shower ...
Multi-messenger Observations of a Binary Neutron Star Merger
Pierre Auger and other collaborations (3541 authors); Mura, G.La; Abreu, P.; Andringa, S.; Assis, P.; Blanco, A.; Cazon, L.; Conceição, R.; Diogo, F.On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of $\sim 1.7\,{\rm{s}}$ with respect to the merger time. From the gravitational-wave signal, th...
Muon counting using silicon photomultipliers in the AMIGA detector of the Pierr...
Pierre Auger collaboration (422 authors); Abreu, P.; Andringa, S.; Assis, P.; Blanco, A.; Cazon, L.; Conceição, R.; Diogo, F.; Espadanal, J.; Lopes, L.AMIGA (Auger Muons and Infill for the Ground Array) is an upgrade of the Pierre Auger Observatory designed to extend its energy range of detection and to directly measure the muon content of the cosmic ray primary particle showers. The array will be formed by an infill of surface water-Cherenkov detectors associated with buried scintillation counters employed for muon counting. Each counter is composed of three...
Search for High-energy Neutrinos from Binary Neutron Star Merger GW170817 with ...
ANTARES, IceCube, Pierre Auger, LIGO Scientific, Virgo collaboration (1941 authors); Abreu, P.; Andringa, S.; Assis, P.; Blanco, A.; Cazon, L.The Advanced LIGO and Advanced Virgo observatories recently discovered gravitational waves from a binary neutron star inspiral. A short gamma-ray burst (GRB) that followed the merger of this binary was also recorded by the Fermi Gamma-ray Burst Monitor (Fermi-GBM), and the Anti-Coincidence Shield for the Spectrometer for the International Gamma-Ray Astrophysics Laboratory (INTEGRAL), indicating particle acceler...
Sensitivity of EAS measurements to the energy spectrum of muons
Espadanal, J.; Cazon, L.; Conceição, R.We have studied how the energy spectrum of muons at production affects some of the most common measurements related to muons in extensive air shower studies, namely, the number of muons at the ground, the slope of the lateral distribution of muons, the apparent muon production depth, and the arrival time delay of muons at ground. We found that by changing the energy spectrum by an amount consistent with the dif...
Hadronic physics with the Pierre Auger Observatory
Cazon, L.Extensive air showers are the result of billions of particle reactions initiated by single cosmic rays at ultra-high energy. Their characteristics are sensitive both to the mass of the primary cosmic ray and to the fine details of hadronic interactions. Ultra-high energy cosmic rays can be used to experimentally extend our knowledge on hadronic interactions in energy and kinematic regions beyond those tested by...
Search for correlations between the arrival directions of IceCube neutrino even...
IceCube, Pierre Auger, Telescope Array collaboration (870 authors); Abreu, P.; Andringa, S.; Assis, P.; Blanco, A.; Cazon, L.; Conceicao, R.; Diogo, F.This paper presents the results of different searches for correlations between very high-energy neutrino candidates detected by IceCube and the highest-energy cosmic rays measured by the Pierre Auger Observatory and the Telescope Array. We first consider samples of cascade neutrino events and of high-energy neutrino-induced muon tracks, which provided evidence for a neutrino flux of astrophysical origin, and st...