Relation of muon flux local anisotropy with primary spectrum index

International Conference on Particle Physics and Astrophysics

物理学;天文学

Dmitrieva, A.N.^1 ; Ampilogov, N.V.^1 ; Astapov, I.I.^1 ; Barbashina, N.S.^1 ; Kovylyaeva, A.A.^1 ; Shutenko, V.V.^1 ; Yakovleva, E.I.^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe shosse 31, Moscow

115409, Russia^1

关键词: Anisotropy vector;    Annual variations;    Arrival direction;    Atmospheric conditions;    Cosmic-ray particles;    Primary particles;    Primary spectra;    Vertical projection;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012047/pdf
DOI  :  10.1088/1742-6596/798/1/012047

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Muon hodoscope URAGAN allows to obtain the angular distribution of the muon flux. This distribution may be characterized by a vector of local anisotropy (the sum of the vectors of the particle arrival directions, normalized to the total number of muons). It was shown that annual variations in the vertical projection of the anisotropy vector AZare not related with changes in atmospheric conditions. The dependence of AZon the index of the primary particles spectrum γ was calculated for several zenith angle intervals with the help of simulation of generation and propagation of secondary cosmic ray particles through the atmosphere using the CORSIKA package. Experimental temporal series of the vertical projection of the local anisotropy AZfor several intervals of zenith angles were obtained for 2007-2015. According to the obtained AZtime series, annual and diurnal changes of Δγwere estimated.