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Proceedings Paper

Imaging solar neutrons below 10 MeV in the inner heliosphere
Author(s): Ulisse Bravar; Paul J. Bruillard; Erwin O. Flueckiger; Alec L. MacKinnon; John R. Macri; Procheta Mallik; Mark L. McConnell; Michael R. Moser; James M. Ryan
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Paper Abstract

Inner heliosphere measurements of the Sun can be conducted with the proposed Solar Sentinel spacecraft and mission. One of the key measurements that can be made inside the orbit of the Earth is that of lower energy neutrons that arise in flares from nuclear reactions. Solar flare neutrons below 10 MeV suffer heavy weak-decay losses before reaching 1 AU. For heliocentric radii as close as 0.3 AU, the number of surviving neutrons from a solar event is dramatically greater. Neutrons from 1-10 MeV provide a new measure of heavy ion interactions at low energies, where the vast majority of energetic ions reside. Such measurements are difficult because of locally generated background neutrons. An instrument to make these measurements must be compact, lightweight and efficient. We describe our progress in developing a low-energy neutron telescope that can operate and measure neutrons in the inner heliosphere and take a brief look at other possible applications for this detector.

Paper Details

Date Published: 18 August 2005
PDF: 10 pages
Proc. SPIE 5901, Solar Physics and Space Weather Instrumentation, 59010I (18 August 2005); doi: 10.1117/12.617392
Show Author Affiliations
Ulisse Bravar, Univ. of New Hampshire (United States)
Paul J. Bruillard, Univ. of New Hampshire (United States)
Erwin O. Flueckiger, Univ. of Bern (Switzerland)
Alec L. MacKinnon, Univ. of Glasgow (United Kingdom)
John R. Macri, Univ. of New Hampshire (United States)
Procheta Mallik, Univ. of New Hampshire (United States)
Mark L. McConnell, Univ. of New Hampshire (United States)
Michael R. Moser, Univ. of Bern (Switzerland)
James M. Ryan, Univ. of New Hampshire (United States)

Published in SPIE Proceedings Vol. 5901:
Solar Physics and Space Weather Instrumentation
Silvano Fineschi; Rodney A. Viereck, Editor(s)

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