Experimental results of the first ANET resolution campaign with the compact neutron collimator

Issue title: UCANS IX Online Conference

Guest editors: David Baxter, Thomas Gutberlet, Koichi Kino, Yoshiaki Kiyanagi, Hiroaki Kumada, Yoshi Otake, Masato Takamura and Xuewu Wang

Article type: Research Article

Authors: Sans-Planell, Oriol^{a; b; *} | Costa, Marco^{a; b} | Durisi, Elisabetta^{a; b} | Mafucci, Ettore^{a; b} | Menzio, Luca^{a; b} | Monti, Valeria^{a; b} | Visca, Lorenzo^{a; b} | Grazzi, Francesco^{c; d} | Bedogni, Roberto^e | Altieri, Saverio^{f; g}

Affiliations: [a] Universita degli Studi di Torino, Via Pietro Giuria 1, 10125, Torino, Italy | [b] INFN, Sezione di Torino, Via Pietro Giuria 1, 10125, Torino, Italy | [c] Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy | [d] INFN, Sezione di Firenze, Via Sansone 1, 50019, Sesto Fiorentino, Italy | [e] INFN, Laboratori Nazionali di Frascati, Via Enrico Fermi 40, 00044, Frascati, Italy | [f] Università degli Studi di Pavia, Via Agostino Bassi, 6, 27100 Pavia, Italy | [g] INFN, Sezione di Pavia, Via Agostino Bassi, 6, 27100 Pavia, Italy

Correspondence: [*] Corresponding author: Oriol Sans-Planell, Università degli Studi di Torino, Istituto Nazionale di Fisica Nucleare, Sezione di Torino, Via Pietro Giuria 1, 10125 Torino, Italy. E-mail: [email protected].

Abstract: This paper presents the first determination of the improvement in beam divergence when including the ANET Compact Neutron Collimator on an existing thermal neutron beam, 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 100 mm long, with a channel width of 2.5 mm, delivering a nominal L/D factor of 160. This measuring campaign illustrates the use of the ANET collimator and its potential application in ne

Keywords: Neutron imaging, neutron collimation, compact neutron collimator

DOI: 10.3233/JNR-220028

Journal: Journal of Neutron Research, vol. 24, no. 3-4, pp. 403-409, 2022