Model for induced ionization by galactic cosmic rays in the Earth atmosphere and ionosphere

Details Model for induced ionization by galactic cosmic rays in the Earth atmosphere and ionosphere Model for induced ionization by galactic cosmic rays in the Earth atmosphere and ionosphere

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009adspr..44.1002v&link_type=abstract

Advances in Space Research, Volume 44, Issue 9, p. 1002-1007.

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The ionization profiles produced by galactic cosmic rays in the Earth atmosphere and ionosphere are obtained on the basis of Monte Carlo simulations. Cascade processes in the atmosphere are simulated using CORSIKA 6.52 code with FLUKA 2006 and QGSJET II hadronic interaction subroutines. Proton induced showers are considered using a realistic atmospheric model (US Standard Atmosphere). The energy deposit from different components is taken into account, namely electromagnetic, hadron and muon components. The curvature of the atmosphere is considered in the computer code. On the basis of the computed ionization yield function the ion pair production rate in the atmosphere is obtained for different conditions and locations. The model is applicable to the entire atmosphere, from ground level to upper atmosphere. Several applications of the obtained results are discussed. The Monte Carlo simulation model considers nuclear interactions below the altitude of 35 km. It is compared with analytical-numerical electron production rate model. The latter model which takes into account the electromagnetic interactions above altitudes of 35 km has two main regions of application: above 50 km (thin target model) and between 35 and 50 km (intermediate target model). A good agreement between the CORSIKA results and analytical-numerical model results is found above altitude of 35 km.

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