Speaker
David Ruffolo
(Mahidol University)
Description
Ionizing radiation in the Earth’s troposphere is mainly due to Galactic cosmic
rays, but ground level enhancements (GLEs) can produce relativistic ions with such enormous
intensity that their ionization effect in the Earth’s lower atmosphere is significant. One
of the largest GLEs ever observed occurred on January 20, 2005, which resulted
in very large increases in the count rates of ground-based particle detectors, especially
near the polar regions. We use data recorded by two neutron monitor stations located
near the magnetic south pole (McMurdo) and north pole (Inuvik) to reconstruct particle
energy spectra at the top of the atmosphere for each location as a function of time. We
create realistic atmospheric models from measured meteorological data and use them
along with the reconstructed particle flux to perform Monte Carlo simulations of
particle-air interactions. We calculate atmospheric ionization at different altitudes and
times during this GLE for each location. The time-dependent ionization profiles
will also be useful for studying radiation dosage on aircraft. Partially supported by the Thailand Research Fund and a postdoctoral fellowship from Mahidol University.
| Registration number following "ICRC2015-I/" | 262 |
|---|---|
| Collaboration | -- not specified -- |
Primary author
Warit Mitthumsiri
(urn:LiveId)
Co-authors
Dr
Achara Seripienlert
(Rajamangala University of Technology Thanyaburi)
Alejandro Sáiz
(Mahidol University)
David Ruffolo
(Mahidol University)
Pierre-Simon MANGEARD
(urn:Google)
Ms
Usanee Tortermpun
(Mahidol University)
