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SUMMARY:Studies of heliospheric modulation of cosmic rays at ShICRA SB RAS
  and prospects of their further development
DTSTART;VALUE=DATE-TIME:20210609T114000Z
DTEND;VALUE=DATE-TIME:20210609T120500Z
DTSTAMP;VALUE=DATE-TIME:20260906T174634Z
UID:indico-contribution-136@indico.nevod.mephi.ru
DESCRIPTION:Speakers: Petr Gololobov (Yu.G. Shafer Institute of Cosmophysi
 cal Research and Aeronomy SB RAS)\nThe ShICRA SB RAS has been conducting t
 heoretical and experimental studies of cosmic rays and their modulation in
  the heliosphere for over 60 years. The results of experimental studies of
  variations in the cosmic ray intensity include the creation of original m
 ethods for the primary processing of the registration data of neutron moni
 tors and muon telescopes\, in particular\, the methods of crossed telescop
 es\, receiving vectors\, and global survey\, which are currently used to s
 olve various fundamental and applied problems. In 1964\, an analysis of th
 e data obtained at the Yakutsk spectrograph was used to explain the nature
  of the observed daily variation in the cosmic ray intensity. A significan
 t contribution to the theoretical study of cosmic rays was the discovery o
 f the regular (diffusion) acceleration mechanism in 1977. Based on this me
 chanism\, a theory of cosmic ray acceleration in the solar corona in linea
 r and quasilinear versions was developed\, the observation of storm partic
 les at the interplanetary shock fronts was explained\, and the acceleratio
 n at the Earth's bow shock was described. Thus\, this mechanism explains t
 he origin of cosmic rays in the heliosphere in a wide energy range from 10
 ^3 to 10^10 eV. Using the global survey method to predict geomagnetic stor
 ms in real-time\, the Institute maintains continuous ground-based monitori
 ng of cosmic rays. We study the tensor anisotropy of cosmic rays\, the nor
 th-south asymmetry of the heliosphere\, and the behavior of the energy spe
 ctrum of cosmic ray decrease in large-scale disturbances of the solar wind
 . A great achievement was creating a basic model of heliospheric modulatio
 n of cosmic rays\, which correctly describes the 11-year variations in the
  intensity of cosmic rays with energies from tens of MeV to tens of GeV ob
 served in various experiments.\nIn recent years\, we study cosmic ray decr
 ease in magnetic clouds. A new mechanism for the Forbush decrease formatio
 n in magnetic clouds is proposed. The Forbush decrease occurs due to energ
 y losses of particles in the inductive electric field of a moving cloud an
 d their quasi-trapping in the helical magnetic field. There are no free pa
 rameters in this theory\; the calculation results agree with observations.
 \nThe registration of cosmic rays will be continued on the new Yakutsk spe
 ctrograph. The analysis of its data will allow us to determine the cosmic 
 ray anisotropy parameters\, isolate the effects of the east-west asymmetry
 \, and study the energy spectra of Forbush decreases in detail ground-leve
 l enhancements of solar cosmic rays. In future theoretical studies\, it is
  planned to consider several topical issues of space physics\, in particul
 ar\, the injection of solar cosmic rays into the interplanetary space\; th
 eir composition\; self-consistent acceleration of charged particles\, and 
 generation of MHD turbulence in flare processes\; the effect of coronal ma
 ss ejections on the space-time distribution of solar and galactic cosmic r
 ays. As a result\, this will help to understand the physical processes in 
 the heliosphere better and\, therefore\, more accurately predict the space
  weather in the vicinity of the Earth.\n\nhttps://indico.nevod.mephi.ru/ev
 ent/6/contributions/136/
LOCATION:Online Zoom
URL:https://indico.nevod.mephi.ru/event/6/contributions/136/
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