Additively Manufactured NdFeB Polyphenylene Sulfide Halbach Magnets to Generate Variable Magnetic Fields for Neutron Reflectometry

Lamichhane, Tej Nath; Charlton, Timothy R.; Andrews, Brian; Malaviya, Devanshi; Pathak, Arjun K.; Ambaye, Haile; Doucet, Mathieu; Lauter, Valeria; Katsaras, John; Post, Brian K.; Paranthaman, Mariappan Parans

doi:10.1089/3dp.2020.0340

Title: Additively Manufactured NdFeB Polyphenylene Sulfide Halbach Magnets to Generate Variable Magnetic Fields for Neutron Reflectometry

Journal Article · 02 August 2021 · 3D Printing and Additive Manufacturing

DOI: https://doi.org/10.1089/3dp.2020.0340 · OSTI ID:1884026

Lamichhane, Tej Nath ^[1];

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
State Univ. of New York (SUNY), Buffalo, NY (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States).
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)

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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office; State University of New York (SUNY); University of Tennessee-Battelle

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1884026

Journal Information:: 3D Printing and Additive Manufacturing, Journal Name: 3D Printing and Additive Manufacturing Journal Issue: 4 Vol. 9; ISSN 2329-7662

Publisher:: Mary Ann Liebert, Inc.Copyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
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Title: Additively Manufactured NdFeB Polyphenylene Sulfide Halbach Magnets to Generate Variable Magnetic Fields for Neutron Reflectometry

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