Open AccessAdditively Manufactured NdFeB Polyphenylene Sulfide Halbach Magnets to Generate Variable Magnetic Fields for Neutron Reflectometry
Author(s) -
Tej N. Lamichhane,
Timothy Charlton,
Brian S. Andrews,
Devanshi Malaviya,
Arjun K. Pathak,
Haile Ambaye,
M. Doucet,
Valeria Lauter,
John Katsaras,
Brian Post,
Mariappan Parans Paranthaman
Publication year - 2022
Publication title -
3d printing and additive manufacturing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.917
H-Index - 26
eISSN - 2329-7670
pISSN - 2329-7662
DOI - 10.1089/3dp.2020.0340
Subject(s) - neodymium magnet , halbach array , magnet , neutron reflectometry , materials science , neutron , polarization (electrochemistry) , magnetic field , physics , mechanical engineering , nuclear physics , neutron scattering , chemistry , engineering , small angle neutron scattering , quantum mechanics
Halbach arrays are the most efficient closed structures for generating directed magnetic fields and gradients, and are widely used in various electric machines. We utilized fused deposition modeling-based Big Area Additive Manufacturing technology to print customized, compensated concentric Halbach array rings, using polyphenylene sulfide-bonded NdFeB permanent magnets for polarized neutron reflectometry. The Halbach rings could generate a 0 ≤ B ≤ 0.30 T field, while preserving 90% polarization of an axial neutron beam. Polarized neutron beams are used to study a wide range of structural and magnetic phenomena spanning physics, chemistry, and biology. In this study, we demonstrate the effectiveness of additive manufacturing for producing prototype Halbach arrays, characterize their magnetic properties, and generated magnetic fields, and discuss the conservation of neutron beam polarization as a function of magnetic field.