@inproceedings{d9bd1161890743399cbdd4ec30c581c5,
title = "Development of the LunaH-Map miniature neutron spectrometer",
abstract = "There is strong evidence that water-ice is relatively abundant within permanently shadowed lunar surface materials, particularly at the poles. Evidence for water-ice has been observed within the impact plume of the LCROSS mission and is supported by data gathered from the Lunar Exploration Neutron Detector (LEND) and the Lunar Prospector Neutron Spectrometer (LPNS). Albedo neutrons from the Moon are used for detection of hydrogen, where the epi-Thermal neutron flux decreases as hydrogen content increases. The origin on the concentration of water within permanently shadowed regions is not completely understood, and the Lunar Polar Hydrogen Mapper (LunaH-Map) mission is designed to provide a high-resolution spatial distribution of the hydrogen content over the southern pole using a highly elliptical, low perilune orbit. The LunaH-Map spacecraft is a 6U cubesat consisting of the Miniature Neutron Spectrometer (Mini-NS). Mini-NS is not collimated, requiring a low altitude to achieve a higher spatial resolution compared to previous missions. To develop a compact neutron detector for epi-Thermal neutrons, the Mini-NS comprises of 2-cm thick slabs of CLYC (Cs2LiYCl6), which provide a sensitivity similar to a 10-Atm, 5.7-cm diameter He-3 tubes, as used in LPNS. The Mini-NS digital processing electronics can discriminate by shape and height to determine signal (albedo neutrons) from background (cosmic rays). The Mini-NS achieves a total active sensing area of 200 cm2 and is covered with a cadmium sheet to shield against thermal neutrons. The research and development on the detector modules show a robust design ready for space flight.",
keywords = "CLYC, Lunar hydrogen, Moon, Neutron spectrometer, Water-ice",
author = "Johnson, {Erik B.} and Craig Hardgrove and Richard Starr and Sam Vogel and Rebecca Frank and Graham Stoddard and Stephen West and James Christian",
note = "Funding Information: We would like to thank the support from NASA for funding this project and for providing the SLS EM-1 launch vehicle to conduct this science. Though not listed as an author, a number of people on the LunaH Map Team has provided valued information on the design of the Mini-NS. Dr. Amanda Cook and Dr. Tony Colaprete at AMES provided support for our vibrational testing, which is much appreciated. We would also like to thank Ethan Cascio at MGH to help setup and run tests with the proton therapy beam. Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIX 2017 ; Conference date: 07-08-2017 Through 09-08-2017",
year = "2017",
doi = "10.1117/12.2276273",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "James, {Ralph B.} and Michael Fiederle and Arnold Burger and Payne, {Stephen A.} and Larry Franks",
booktitle = "Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XIX",
}