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On the Challenges of Measuring Energetic Particles in the Inner Belt: A Geant4 Simulation of an Energetic Particle Detector Instrument, REPTile-2


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dc.creatorKhoo, L
dc.creatorLi, X
dc.creatorSelesnick, R
dc.creatorSchiller, Q
dc.creatorZhang, K
dc.creatorZhao, H
dc.creatorHogan, B
dc.creatorCantilina, J
dc.creatorSims, A
dc.creatorBauch, E
dc.creatorValade, T
dc.creatorBoyajian, S
dc.creatorKohnert, R
dc.date.accessioned2022-11-16T20:55:03Z
dc.date.available2022-11-16T20:55:03Z
dc.date.created2022
dc.identifier10.1029/2021JA030249en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021JA030249en_US
dc.identifier.urihttps://aurora.auburn.edu/handle/11200/50461
dc.identifier.urihttp://dx.doi.org/10.35099/aurora-529
dc.description.abstractFollowing the retirement of the community supported Van Allen Probes mission, the quest for high-quality energetic particle measurements in the radiation belts is likely to be taken on by smaller spacecraft like CubeSats in the foreseeable future. Here we introduce the Relativistic Electron Proton Telescope integrated little experiment-2 (REPTile-2), a miniaturized (similar to 1.5 U) solid-state charged particle telescope that aims to undertake this challenging task. It incorporates detailed pulse-height analysis to enable 60 electron channels and 60 proton channels and includes anticoincidence detectors to minimize unwanted background contamination. This paper presents a description of the REPTile-2 design and emphasizes the importance of extensive Geant4-based analysis to inform the design of a new energetic particle detector and characterize the instrument response. Our analysis shows that REPTile-2 can measure similar to 0.3-similar to 4 MeV electrons and similar to 6.7-35 MeV protons with energy resolution ( increment E/E) of 7%-38% for electrons and 1.5%-5% for protons. Results from a Sr-90/Y-90 radioactive source test have verified the instrument performance and the validity of the Geant4 simulations. These energetic particle measurements will enable a new scientific understanding of the inner radiation belt, where unwanted contamination from the unforgiving penetration of highly energetic protons (tens of MeV to GeV) is common, and provide detailed quantification of the inner belt electrons and protons in the low-Earth orbit that is crucial for space weather modeling.en_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.ispartofJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICSen_US
dc.relation.ispartofseries2169-9380en_US
dc.rights©American Geophysical Union 2022. This is this the version of record co-published by the American Geophysical Union and John Wiley & Sons, Inc. It is made available under the CC-BY-NC-ND 4.0 license. Item should be cited as: Khoo, L. Y., Li, X., Selesnick, R. S., Schiller, Q., Zhang, K., Zhao, H., ... & Kohnert, R. (2022). On the Challenges of Measuring Energetic Particles in the Inner Belt: A Geant4 Simulation of an Energetic Particle Detector Instrument, REPTile‐2. Journal of Geophysical Research: Space Physics, 127(4), e2021JA030249.en_US
dc.titleOn the Challenges of Measuring Energetic Particles in the Inner Belt: A Geant4 Simulation of an Energetic Particle Detector Instrument, REPTile-2en_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume127en_US
dc.citation.issue4en_US
dc.description.statusPublisheden_US
dc.description.peerreviewYesen_US
dc.creator.orcid0000-0002-1654-2176en_US
dc.creator.orcid0000-0002-1683-3192en_US
dc.creator.orcid0000-0001-8292-7691en_US
dc.creator.orcid0000-0003-0412-1064en_US

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