A model of the cosmic ray induced atmospheric neutron environment
2015 (English)In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 62, 230-240 p.Article in journal (Refereed) Published
In order to optimise the design of space instruments making use of detection materials with low atomic numbers, an understanding of the atmospheric neutron environment and its dependencies on time and position is needed. To produce a simple equation based model, Monte Carlo simulations were performed to obtain the atmospheric neutron fluxes produced by charged galactic cosmic ray interactions with the atmosphere. Based on the simulation results the omnidirectional neutron environment was parametrized including dependencies on altitude, magnetic latitude and solar activity. The upward- and downward-moving component of the atmospheric neutron flux are considered separately. The energy spectra calculated using these equations were found to be in good agreement with data from a purpose built balloon-borne neutron detector, high altitude aircraft data and previously published simulation based spectra.
Place, publisher, year, edition, pages
2015. Vol. 62, 230-240 p.
Atmospheric neutrons, Monte Carlo, Cosmic rays, Instrumental background
IdentifiersURN: urn:nbn:se:kth:diva-160042DOI: 10.1016/j.astropartphys.2014.10.002ISI: 000346548200024ScopusID: 2-s2.0-84908461780OAI: oai:DiVA.org:kth-160042DiVA: diva2:793348
FunderSwedish National Space Board
QC 201503062015-03-062015-02-132015-03-06Bibliographically approved