Numerical modeling of neutron spectra above the martian surface preliminary results
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Numerical modeling of neutron spectra above the Martian surface (preliminary results). Krylov A.R., Shvetsov V.N., Timoshenko G.N. 141980, JINR, Dubna, Russia. Soil model. Four elements: Si, O, Fe, H Elements percentage [i] : O – 56.7 w. % Si – 26.6 w. % + H 2 O Fe – 16.7 w. %

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Numerical modeling of neutron spectra above the Martian surface (preliminary results)

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Numerical modeling of neutron spectra above the martian surface preliminary results

Numerical modeling of neutron spectra above the Martian surface(preliminary results)

Krylov A.R., Shvetsov V.N., Timoshenko G.N.

141980, JINR, Dubna, Russia

“The First year of HEND operation


Soil model

Soil model

  • Four elements: Si, O, Fe, H

  • Elements percentage [i]:

    • O – 56.7 w. %

    • Si – 26.6 w. % + H2O

    • Fe – 16.7 w. %

      Joseph Masarik and Robert C. Reedy Journal of Geophysical Research, vol.101, No. E8, p.p. 18,891-18,912, August 25, 1996.

“The First year of HEND operation


Soil x sessions

Soil X-sessions

Soil & water densities = 1 g/cm3

“The First year of HEND operation


Numerical modeling of neutron spectra above the martian surface preliminary results

GCR

Astroparticle Physics,

16(2001), 13-46

RUNJOB Collaboration

“The First year of HEND operation


Numerical modeling of neutron spectra above the martian surface preliminary results

GCR

“The First year of HEND operation


Computer codes

Computer Codes

  • LAHET (Los Alamos High Energy Transport), Bertini model for intranuclear cascade

    +

  • MCNP4B (Monte Carlo N-Particle)

“The First year of HEND operation


Neutron spectra on 400 km orbit

Neutron Spectra on 400 km Orbit

“The First year of HEND operation


Neutron spectra on 400 km orbit1

Neutron Spectra on 400 km Orbit

“The First year of HEND operation


Neutron spectra on 400 km orbit2

Neutron Spectra on 400 km Orbit

“The First year of HEND operation


Neutron spectra on 400 km orbit3

Neutron Spectra on 400 km Orbit

“The First year of HEND operation


Conclusion perspectives

CONCLUSION, PERSPECTIVES

  • Taking into account the modulation of GCR flux due to Solar activity

  • Comparison of the results, obtained with different computer codes (different models) & data libraries

  • Soil content specification

  • Importance of the “Ratio’s” information

“The First year of HEND operation


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