Cosmic ray observations from Livingston Island
Astronomía
Physics
Astronomy
0103 physical sciences
Física
01 natural sciences
0105 earth and related environmental sciences
DOI:
10.1016/j.asr.2022.02.046
Publication Date:
2022-03-04T10:25:11Z
AUTHORS (8)
ABSTRACT
Agencia Estatal de Investigación<br/>ORCA, from the Spanish name Observatorio de Rayos Cósmicos Antártico, is a cosmic ray detector devoted to the observation of secondary cosmic rays at Juan Carlos I Spanish Antarctic Base (62° 39′ 46″ S, 60° 23′ 20″ W, 12 m above sea level). ORCA was installed at the beginning of January 2019 after performing a latitudinal survey from Vigo (Spain) to Livingston Island aboard the Sarmiento de Gamboa Research Vessel. ORCA was in commissioning phase from January 2019 to March 2020, being in normal operation mode from March 2020. A vertical cutoff rigidity of 2.37GV has been computed at ORCA location and during the first year of operation, i. e. from March 2020 to March 2021. ORCA consists of three detectors stacked in a shared structure that maintains the relative distances between the detectors. A muon telescope (ORCM), a neutron monitor without any shielding around (ORCB) and a 3NM64 neutron monitor (ORCA). This configuration allows the measurement of neutron count rates at two different energy thresholds, muon count rate and muon incident directions. Measurements recorded during the first year of operation and ORCA potential capabilities are shown in this work.<br/>
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