Focusing and imaging of cold neutrons with a permanent magnetic lens

Cremer, Jay T.; Filter, Hanno; Klepp, Jürgen; Geltenbort, Peter; Dewhurst, Charles; Oda, Tatsuro; Pantell, Richard H.

doi:10.1063/1.5116759

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

Journal Article · 09 January 2020 · Review of Scientific Instruments

DOI: https://doi.org/10.1063/1.5116759 · OSTI ID:1595878

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Adelphi Technology, Inc., Redwood City, CA (United States); Adelphi Technology Inc.
Technical Univ. of Munich (Germany)
Univ. of Vienna (Austria)
Inst. Laue-Langevin (ILL), Grenoble (France)
Kyoto Univ. (Japan)
Stanford Univ., CA (United States)

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.

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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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