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Verification of magnetic field models based on measurements of solar cosmic ray protons in the magnetosphere

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Abstract

Measurements of solar cosmic ray (SCR) protons in the magnetosphere can be used to verify models of the Earth’s magnetic field. The latitudinal profiles of precipitating SCRs with energies of 1–90 MeV were measured on the CORONAS-F low-orbiting satellite during a strong magnetic storm on October 29–30, 2003. A flux of precipitating protons can remain equal to the interplanetary flux only due to a strong pitch angle diffusion that originates when the radius of the field line curvature is close to that of the particle rotation Larmor radius. The observed boundaries of the strong diffusion region can be compared with the boundaries anticipated according to the models of the magnetic field of the Earth’s magnetosphere. The adiabaticity parameter values, calculated for several instants of the CORONAS-F satellite pass based on the TS05 and parabolic models, do not always correspond to measurements. How possible changes in the model configurations of the magnetic field can allow us to eliminate discrepancies with the experiment and to explain why solar protons with energies of several megaelectronvolts penetrate deep in the Earth’s inner magnetosphere is considered here.

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Authors and Affiliations

  1. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow, 119991, Russia

    L. L. Lazutin & E. A. Murav’eva

  2. Institute of Experimental Physics, Slovak Academy of Sciences, 04001, Kosice, Slovakia

    K. Kudela & M. Slivka

Authors
  1. L. L. Lazutin
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  2. E. A. Murav’eva
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  3. K. Kudela
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  4. M. Slivka
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Original Russian Text © L.L. Lazutin, E.A. Murav’eva, K. Kudela, M. Slivka, 2011, published in Geomagnetizm i Aeronomiya, 2011, Vol. 51, No. 2, pp. 202–213.

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Lazutin, L.L., Murav’eva, E.A., Kudela, K. et al. Verification of magnetic field models based on measurements of solar cosmic ray protons in the magnetosphere. Geomagn. Aeron. 51, 198–209 (2011). https://doi.org/10.1134/S0016793211010087

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  • DOI: https://doi.org/10.1134/S0016793211010087

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