The Pierre Auger Observatory scaler mode for the study of solar activity modulation of galactic cosmic rays

Journal Article · Sat Jan 01 00:00:00 EST 2011 · JINST 6:P01003,2011

DOI:https://doi.org/10.1088/1748-0221/6/01/P01003· OSTI ID:1013150

Abreu, P; Aglietta, M; Ahn, E J; Allard, D; Allekotte, I; Allen, J; Alvarez Castillo, J; Alvarez-Muniz, J; Ambrosio, M; Aminaei, A; Anchordoqui, L

Since data-taking began in January 2004, the Pierre Auger Observatory has been recording the count rates of low energy secondary cosmic ray particles for the self-calibration of the ground detectors of its surface detector array. After correcting for atmospheric effects, modulations of galactic cosmic rays due to solar activity and transient events are observed. Temporal variations related with the activity of the heliosphere can be determined with high accuracy due to the high total count rates. In this study, the available data are presented together with an analysis focused on the observation of Forbush decreases, where a strong correlation with neutron monitor data is found.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1013150
• Report Number(s): FERMILAB-PUB-11-037-AD-AE-CD-TD; TRN: US201110%%486
• Journal Information: JINST 6:P01003,2011, Vol. 6; ISSN 1748-0221
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCURACY
FORBUSH DECREASE
HELIOSPHERE
MODULATION
NEUTRON MONITORS
SCALERS
SOLAR ACTIVITY
TRANSIENTS
Astrophysics