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Title: Focusing and imaging of cold neutrons with a permanent magnetic lens

Abstract

This paper reports imaging of objects with slow neutrons, specifically very cold neutrons (VCN) and cold neutrons (CN) at Institut Laue Langevin (ILL), using novel, permanent magnet (Nd 2Fe 14B) compound refractive lenses (MCRL) with a large 2.5 cm bore diameter. The MCRL focuses and images spin-up neutrons and defocuses spin-down neutrons, via a large, radial magnetic field gradient. A single lens neutron microscope, comprised of a MCRL objective lens with 2-fold magnification was tested, using very cold (slow) neutrons at 45 Å wavelength. One-to-one imaging was obtained using 16.7 Å, polarized neutrons. The magnetic field gradient of the MCRL was measured by raster-scanned pencil beams on D33. Finally, a compound neutron microscope was realized, using a MCRL condenser lens, which provided increased illumination of objects, and a MCRL as objective lens to produce 3.5-fold magnification.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [5];  [6]
+ Show Author Affiliations
  1. Adelphi Technology, Inc., Redwood City, CA (United States)
  2. Technical Univ. of Munich (Germany)
  3. Univ. of Vienna (Austria)
  4. Inst. Laue-Langevin (ILL), Grenoble (France)
  5. Kyoto Univ. (Japan)
  6. Stanford Univ., CA (United States)
Publication Date:
Research Org.:
Adelphi Technology, Inc., Redwood City, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1595878
Grant/Contract Number:  
[SC0007684]
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
[ Journal Volume: 91; Journal Issue: 1]; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; magnetic neutron optics; magnetic neutron lenses; neutron microscope; neutron optics; focusing and imaging of cold neutrons; neutron lenses; polarized neutron microscope

Citation Formats

Cremer, Jay T., Filter, Hanno, Klepp, Jürgen, Geltenbort, Peter, Dewhurst, Charles, Oda, Tatsuro, and Pantell, Richard H. Focusing and imaging of cold neutrons with a permanent magnetic lens. United States: N. p., 2020. Web. doi:10.1063/1.5116759.
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Cremer, Jay T., Filter, Hanno, Klepp, Jürgen, Geltenbort, Peter, Dewhurst, Charles, Oda, Tatsuro, & Pantell, Richard H. Focusing and imaging of cold neutrons with a permanent magnetic lens. United States. doi:10.1063/1.5116759.
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Cremer, Jay T., Filter, Hanno, Klepp, Jürgen, Geltenbort, Peter, Dewhurst, Charles, Oda, Tatsuro, and Pantell, Richard H. Fri . "Focusing and imaging of cold neutrons with a permanent magnetic lens". United States. doi:10.1063/1.5116759.
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@article{osti_1595878,
title = {Focusing and imaging of cold neutrons with a permanent magnetic lens},
author = {Cremer, Jay T. and Filter, Hanno and Klepp, Jürgen and Geltenbort, Peter and Dewhurst, Charles and Oda, Tatsuro and Pantell, Richard H.},
abstractNote = {This paper reports imaging of objects with slow neutrons, specifically very cold neutrons (VCN) and cold neutrons (CN) at Institut Laue Langevin (ILL), using novel, permanent magnet (Nd2Fe14B) compound refractive lenses (MCRL) with a large 2.5 cm bore diameter. The MCRL focuses and images spin-up neutrons and defocuses spin-down neutrons, via a large, radial magnetic field gradient. A single lens neutron microscope, comprised of a MCRL objective lens with 2-fold magnification was tested, using very cold (slow) neutrons at 45 Å wavelength. One-to-one imaging was obtained using 16.7 Å, polarized neutrons. The magnetic field gradient of the MCRL was measured by raster-scanned pencil beams on D33. Finally, a compound neutron microscope was realized, using a MCRL condenser lens, which provided increased illumination of objects, and a MCRL as objective lens to produce 3.5-fold magnification.},
doi = {10.1063/1.5116759},
journal = {Review of Scientific Instruments},
number = [1],
volume = [91],
place = {United States},
year = {2020},
month = {1}
}
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DOI:  10.1063/1.5116759
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