Neutron focusing lens using polycapillary fibers

Journal Article · Mon Apr 18 00:00:00 EDT 1994 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.111709· OSTI ID:5003734

Chen, H; Mildner, D F.R. ^[1]; Xiao, Q F ^[2]

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1. National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
2. X-Ray Optical Systems, Inc., Albany, New York 12222 (United States)

Multiple mirror reflection at small grazing angles from the smooth surfaces of the narrow channels of polycapillary fibers can be used to transport, bend, and focus thermal neutron beams. We report the results of the focusing of a polychromatic cold neutron beam using a compact lens of borosilicate fibers and with a focal distance of 57 mm. The intensity profile of the beam at the focus is approximately conical in shape with a full width at half-maximum of 0.49 mm, and with an average gain in intensity of about 20. These experimental results agree well with those obtained by computer simulation.

• DOE Contract Number: FG02-91ER81220; FG02-92ER81411
• OSTI ID: 5003734
• Journal Information: Applied Physics Letters; (United States), Journal Name: Applied Physics Letters; (United States) Vol. 64:16; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

663610* -- Neutron Physics-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BEAMS
BLOOD VESSELS
BODY
BOROSILICATE GLASS
CAPILLARIES
CARDIOVASCULAR SYSTEM
COMPUTERIZED SIMULATION
CURRENT DENSITY
ELEMENTARY PARTICLES
FERMIONS
FIBERS
FOCUSING
GLASS
HADRONS
NEUTRON BEAMS
NEUTRONS
NUCLEON BEAMS
NUCLEONS
ORGANS
PARTICLE BEAMS
SIMULATION
THERMAL NEUTRONS