Investigations of Forbush decreases in the PAMELA experiment

International Conference on Particle Physics and Astrophysics

物理学;天文学

Lagoida, I.A.^1 ; Voronov, S.A.^1 ; Mikhailov, V.V.^1

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

115409, Russia^1

关键词: Earth's surface;    Forbush decrease;    Forbush effects;    Galactic cosmic rays;    Muon hodoscopes;    Neutron monitors;    Satellite detectors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/798/1/012038/pdf
DOI  :  10.1088/1742-6596/798/1/012038

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

A phenomenon in cosmic ray physics now called Forbush decrease (FD), or Forbush effect was discovered by S. Forbush in 1937 [1], it is a sudden decrease of galactic cosmic ray (GCR) intensity near the Earth. However, despite of the long term investigations the nature of this phenomenon is still not completely understood. Today this effect is studied mostly by the neutron monitors and muon hodoscopes, which are located on the Earth's surface. But these monitors can detect only products of GCR interaction with the Earth atmosphere. Satellite detectors allow to obtain more accurate information about the characteristics of FD. Examples of FDs registered by the PAMELA telescope and observed with Oulu neutron monitor are presented. About 10 events with amplitude more than 3% have been registered from 2006 till 2016 with the PAMELA experiment.