Seminar Details

FLUKA Simulation of the Radiation Environment on the Surface of Mars

Jeremy Northum, Texas A&M University
Thursday, May 9, 2:00 PM - Special Seminar
NSCL Lecture Hall

Uncertainties persist regarding the carcinogenic risk associated with exposure to galactic cosmic rays (GCRs). While Fe ions represent only 0.03% of the GCR spectrum in terms of particle abundance, they contribute nearly 30% of the dose equivalent. Because of this, Fe-ion beams are often used for radiation biology studies geared towards understanding the biological effects of exposure to GCRs. It is anticipated that Fe ions may not contribute as significantly to the dose equivalent on the surface of Mars as compared to free space. The present study uses the Monte Carlo code FLUKA to simulate the response of a tissue-equivalent proportional counter on the surface of Mars to provide dosimetry values and microdosimetry distributions. Additionally, differential energy spectra will be generated in order to determine the fractional contribution to frequency, dose, and dose equivalent for each elemental ion from H to Ni on the surface of Mars. It is anticipated that these data will provide relevant benchmarks for use in future mission planning studies.