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First results with the ANET Compact Thermal Neutron Collimator

Authors :: Marco Costa
Oriol Sans-Planell
Saverio Altieri
V. Monti
Roberto Bedogni
Lorenzo Visca
E. Durisi
Francesco Grazzi
L. Menzio
E. Mafucci
Source :: Journal of instrumentation 16 (2021): P11025-1–P11025-9. doi:10.1088/1748-0221/16/11/P11025, info:cnr-pdr/source/autori:Sans-Planell O.; Costa M.; Durisi E.; Mafucci E.; Menzio L.; Monti V.; Visca L.; Grazzi F.; Bedogni R.; Altieri S./titolo:First results with the ANET Compact Thermal Neutron Collimator/doi:10.1088%2F1748-0221%2F16%2F11%2FP11025/rivista:Journal of instrumentation/anno:2021/pagina_da:P11025-1/pagina_a:P11025-9/intervallo_pagine:P11025-1–P11025-9/volume:16
Publication Year :: 2021
Publisher :: IOP Publishing, 2021.
Abstract: This paper presents the first determination of the spatial resolution of the ANET Compact Neutron Collimator, obtained with a measuring campaign at the LENA Mark-II TRIGA reactor in Pavia. This novel collimator consists of a sequence of collimating and absorbing channels organised in a chessboard-like geometry. It has a scalable structure both in length and in the field of view. It is characterized by an elevated collimation power within a limited length. Its scalability and compactness are added values with respect to traditional collimating system. The prototype tested in this article is composed of 4 concatenated stages, each 100mm long, with a channel width of 2.5mm, delivering a nominal L/D factor of 160. This measuring campaign illustrates the use of the ANET collimator and its potential application in neutron imaging for facilities with small or medium size neutron sources.<br />Comment: 9 pages, 8 figures, prepared for submission to JINST