Forbush decrease in the intensity of cosmic rays in a toroidal model of a magnetic cloud

The time dynamics of the particle distribution function in a magnetic cloud with the shape of a toroidal segment with the characteristic (forceless) structure of a magnetic field has been calculated. The shape of the cloud at the subsequent propagation in the interplanetary space has been determined...

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Bibliographic Details
Published inJETP letters Vol. 102; no. 11; pp. 697 - 700
Main Authors Petukhova, A. S., Petukhov, I. S., Petukhov, S. I.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.12.2015
Subjects
Astrophysics and Cosmology
Atomic
Biological and Medical Physics
Biophysics
Molecular
Optical and Plasma Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Quantum Information Technology
Solid State Physics
Spintronics
Forbush Decrease
JETP Letter
Back Trajectory
Magnetic Cloud
Particle Distribution Function
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Summary:The time dynamics of the particle distribution function in a magnetic cloud with the shape of a toroidal segment with the characteristic (forceless) structure of a magnetic field has been calculated. The shape of the cloud at the subsequent propagation in the interplanetary space has been determined by the kinematic model. The magnetic field of the cloud is calculated using the freezing-in condition. A significant effect of regions connecting the magnetic cloud with the Sun on the propagation of particles in the region of perturbation has been revealed. The calculation of the particle density and anisotropy of the intensity demonstrates reasonable agreement with the measurements. The results indicate the decisive role of the characteristic structure of the magnetic field in the time dynamics of the Forbush decrease in the intensity of cosmic rays.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364015230125