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A balloon-borne measurement of high latitude atmospheric neutrons using a licaf neutron detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0003-0441-4959
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0001-5191-9306
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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Number of Authors: 15
2013 (English)In: 2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), IEEE conference proceedings, 2013, , 8 p.6829591- p.Conference paper, Published paper (Refereed)
Abstract [en]

PoGOLino is a scintillator-based neutron detector. Its main purpose is to provide data on the neutron flux in the upper stratosphere at high latitudes at thermal and nonthermal energies for the PoGOLite instrument. PoGOLite is a balloon borne hard X-ray polarimeter for which the main source of background stems from high energy neutrons. No measurements of the neutron environment for the planned flight latitude and altitude exist. Furthermore this neutron environment changes with altitude, latitude and solar activity, three variables that will vary throughout the PoGOLite flight. PoGOLino was developed to study the neutron environment and the influences from these three variables upon it. PoGOLino consists of two Europium doped Lithium Calcium Aluminium Fluoride (Eu:LiCAF) scintillators, each of which is sandwiched between 2 Bismuth Germanium Oxide (BGO) scintillating crystals, which serve to veto signals produced by gamma-rays and charged particles. This allows the neutron flux to be measured even in high radiation environments. Measurements of neutrons in two separate energy bands are achieved by placing one LiCAF detector inside a moderating polyethylene shield while the second detector remains unshielded. The PoGOLino instrument was launched on March 20th 2013 from the Esrange Space Center in Northern Sweden to an altitude of 30.9 km. A description of the detector design and read-out system is presented. A detailed set of simulations of the atmospheric neutron environment performed using both PLANETOCOSMICS and Geant4 will also be described. The comparison of the neutron flux measured during flight to predictions based on these simulations will be presented and the consequences for the PoGOLite background will be discussed.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2013. , 8 p.6829591- p.
Series
IEEE Nuclear Science Symposium Conference Record, ISSN 1095-7863
Keyword [en]
atmospheric, balloon-borne, LiCAF, neutrons, PoGOLino, PoGOLite, polarimetry, X-ray
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:kth:diva-138915DOI: 10.1109/NSSMIC.2013.6829591ISI: 000347163502170Scopus ID: 2-s2.0-84904213057ISBN: 978-147990534-8 (print)OAI: oai:DiVA.org:kth-138915DiVA: diva2:681930
Conference
2013 60th IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2013; Seoul; South Korea; 27 October 2013 through 2 November 2013
Projects
PoGOLite
Funder
Knut and Alice Wallenberg Foundation
Note

QC 20140218

Available from: 2013-12-20 Created: 2013-12-20 Last updated: 2015-12-03Bibliographically approved

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Kole, MerlinKiss, MozsiPearce, Mark

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