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A model of the cosmic ray induced atmospheric neutron environment
KTH, School of Engineering Sciences (SCI), Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0001-7011-7229
KTH, School of Engineering Sciences (SCI), Physics.
2015 (English)In: Astroparticle physics, ISSN 0927-6505, E-ISSN 1873-2852, Vol. 62, 230-240 p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
Atmospheric neutrons, Monte Carlo, Cosmic rays, Instrumental background
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-160042DOI: 10.1016/j.astropartphys.2014.10.002ISI: 000346548200024Scopus ID: 2-s2.0-84908461780OAI: oai:DiVA.org:kth-160042DiVA: diva2:793348
Funder
Swedish National Space Board
Note

QC 20150306

Available from: 2015-03-06 Created: 2015-02-13 Last updated: 2017-12-04Bibliographically approved

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Pearce, Mark

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