The scaler mode in the Pierre Auger Observatory to study heliospheric modulation of cosmic rays
The impact of the solar activity on the heliosphere has a strong influence on the modulation of the flux of low energy galactic cosmic rays arriving at Earth. Different instruments, such as neutron monitors or muon detectors, have been recording the variability of the cosmic ray flux at ground level...
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paper:paper_02731177_v49_n11_p1563_Dasso2023-06-08T15:25:40Z The scaler mode in the Pierre Auger Observatory to study heliospheric modulation of cosmic rays Dasso, Sergio Ricardo Cherenkov detectors Cosmic rays Interplanetary coronal mass ejections Particle detectors Cherenkov Detectors Cosmic ray flux Count rates Forbush decrease Galactic cosmic rays Ground level Heliospheres Heliospheric modulation Interplanetary coronal mass ejections Low energies Muon detectors Neutron monitors Pierre Auger observatory Secondary particles Self calibration Solar activity Surface detectors Time variations Total counts Augers Buildings Galaxies Interplanetary spacecraft Modulation Observatories Particle detectors Planetary surface analysis Solar energy Cosmic rays The impact of the solar activity on the heliosphere has a strong influence on the modulation of the flux of low energy galactic cosmic rays arriving at Earth. Different instruments, such as neutron monitors or muon detectors, have been recording the variability of the cosmic ray flux at ground level for several decades. Although the Pierre Auger Observatory was designed to observe cosmic rays at the highest energies, it also records the count rates of low energy secondary particles (the scaler mode) for the self-calibration of its surface detector array. From observations using the scaler mode at the Pierre Auger Observatory, modulation of galactic cosmic rays due to solar transient activity has been observed (e.g., Forbush decreases). Due to the high total count rate coming from the combined area of its detectors, the Pierre Auger Observatory (its detectors have a total area greater than 16,000 m 2) detects a flux of secondary particles of the order of ∼10 8 counts per minute. Time variations of the cosmic ray flux related to the activity of the heliosphere can be determined with high accuracy. In this paper we briefly describe the scaler mode and analyze a Forbush decrease together with the interplanetary coronal mass ejection that originated it. The Auger scaler data are now publicly available. © 2011 COSPAR. Published by Elsevier Ltd. All rights reserved. Fil:Dasso, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02731177_v49_n11_p1563_Dasso http://hdl.handle.net/20.500.12110/paper_02731177_v49_n11_p1563_Dasso |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Cherenkov detectors Cosmic rays Interplanetary coronal mass ejections Particle detectors Cherenkov Detectors Cosmic ray flux Count rates Forbush decrease Galactic cosmic rays Ground level Heliospheres Heliospheric modulation Interplanetary coronal mass ejections Low energies Muon detectors Neutron monitors Pierre Auger observatory Secondary particles Self calibration Solar activity Surface detectors Time variations Total counts Augers Buildings Galaxies Interplanetary spacecraft Modulation Observatories Particle detectors Planetary surface analysis Solar energy Cosmic rays |
| spellingShingle |
Cherenkov detectors Cosmic rays Interplanetary coronal mass ejections Particle detectors Cherenkov Detectors Cosmic ray flux Count rates Forbush decrease Galactic cosmic rays Ground level Heliospheres Heliospheric modulation Interplanetary coronal mass ejections Low energies Muon detectors Neutron monitors Pierre Auger observatory Secondary particles Self calibration Solar activity Surface detectors Time variations Total counts Augers Buildings Galaxies Interplanetary spacecraft Modulation Observatories Particle detectors Planetary surface analysis Solar energy Cosmic rays Dasso, Sergio Ricardo The scaler mode in the Pierre Auger Observatory to study heliospheric modulation of cosmic rays |
| topic_facet |
Cherenkov detectors Cosmic rays Interplanetary coronal mass ejections Particle detectors Cherenkov Detectors Cosmic ray flux Count rates Forbush decrease Galactic cosmic rays Ground level Heliospheres Heliospheric modulation Interplanetary coronal mass ejections Low energies Muon detectors Neutron monitors Pierre Auger observatory Secondary particles Self calibration Solar activity Surface detectors Time variations Total counts Augers Buildings Galaxies Interplanetary spacecraft Modulation Observatories Particle detectors Planetary surface analysis Solar energy Cosmic rays |
| description |
The impact of the solar activity on the heliosphere has a strong influence on the modulation of the flux of low energy galactic cosmic rays arriving at Earth. Different instruments, such as neutron monitors or muon detectors, have been recording the variability of the cosmic ray flux at ground level for several decades. Although the Pierre Auger Observatory was designed to observe cosmic rays at the highest energies, it also records the count rates of low energy secondary particles (the scaler mode) for the self-calibration of its surface detector array. From observations using the scaler mode at the Pierre Auger Observatory, modulation of galactic cosmic rays due to solar transient activity has been observed (e.g., Forbush decreases). Due to the high total count rate coming from the combined area of its detectors, the Pierre Auger Observatory (its detectors have a total area greater than 16,000 m 2) detects a flux of secondary particles of the order of ∼10 8 counts per minute. Time variations of the cosmic ray flux related to the activity of the heliosphere can be determined with high accuracy. In this paper we briefly describe the scaler mode and analyze a Forbush decrease together with the interplanetary coronal mass ejection that originated it. The Auger scaler data are now publicly available. © 2011 COSPAR. Published by Elsevier Ltd. All rights reserved. |
| author |
Dasso, Sergio Ricardo |
| author_facet |
Dasso, Sergio Ricardo |
| author_sort |
Dasso, Sergio Ricardo |
| title |
The scaler mode in the Pierre Auger Observatory to study heliospheric modulation of cosmic rays |
| title_short |
The scaler mode in the Pierre Auger Observatory to study heliospheric modulation of cosmic rays |
| title_full |
The scaler mode in the Pierre Auger Observatory to study heliospheric modulation of cosmic rays |
| title_fullStr |
The scaler mode in the Pierre Auger Observatory to study heliospheric modulation of cosmic rays |
| title_full_unstemmed |
The scaler mode in the Pierre Auger Observatory to study heliospheric modulation of cosmic rays |
| title_sort |
scaler mode in the pierre auger observatory to study heliospheric modulation of cosmic rays |
| publishDate |
2012 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02731177_v49_n11_p1563_Dasso http://hdl.handle.net/20.500.12110/paper_02731177_v49_n11_p1563_Dasso |
| work_keys_str_mv |
AT dassosergioricardo thescalermodeinthepierreaugerobservatorytostudyheliosphericmodulationofcosmicrays AT dassosergioricardo scalermodeinthepierreaugerobservatorytostudyheliosphericmodulationofcosmicrays |
| _version_ |
1768546019083026432 |