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

Journal Article · · Review of Scientific Instruments
DOI: https://doi.org/10.1063/1.5116759 · OSTI ID:1595878

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.

Research Organization:
Adelphi Technology, Inc., Redwood City, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0007684
OSTI ID:
1595878
Journal Information:
Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 91; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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