Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 245-254 |
| Number of pages | 10 |
| Journal | 3D Printing and Additive Manufacturing |
| Volume | 9 |
| Issue number | 4 |
| DOIs | |
| State | Published - Aug 1 2022 |
Funding
A.K.P. acknowledges financial support from the the State University of New York (SUNY), Buffalo State, Office of Undergraduate Research Program, and the startup fund from SUNY, Buffalo State. A portion of this research used resources at the SNS, a Department of Energy (DOE) Office of Science User Facility operated by the ORNL. Neutron measurements were carried out on the magnetism reflectometer at the SNS, which is sponsored by the Scientific User Facilities Division, Office of Basic Energy Sciences, DOE. Thanks to Robert Fredette, Bunting Dubois Magnetics, for helping to magnetize the printed magnets. This article has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the U.S. DOE. The publisher, by accepting the article for publication, acknowledges that the U.S. government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this article, or to allow others to do so, for U.S. government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). Magnet printing research was supported by the Critical Materials Institute, an Energy Innovation Hub funded by the U.S. DOE, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office. Halbach array fabrication and characterization research were supported by the Laboratory Directed Research and Development program of the ORNL. J.K. is supported through the Scientific User Facilities Division of the U.S. DOE, Office of Science, sponsored by the Basic Energy Science Program, DOE Office of Science, under Contract DEAC05-00OR22725.
| Funders | Funder number |
|---|---|
| Basic Energy Science Program | |
| Critical Materials Institute | |
| SUNY, Buffalo State | |
| Scientific User Facilities Division | |
| U.S. Department of Energy | |
| Advanced Manufacturing Office | |
| Office of Science | |
| Office of Energy Efficiency and Renewable Energy | |
| Basic Energy Sciences | DE-AC05-00OR22725 |
| Oak Ridge National Laboratory | |
| Laboratory Directed Research and Development | |
| State University of New York |
Keywords
- Halbach arrays
- PPS polymer NdFeB composite magnets
- neutron reflectivity
- printed NdFeB-bonded magnets
