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Refractive and diffractive neutron optics with reduced chromatic aberration

Poulsen, S. O.; Poulsen, H. F. and Bentley, Phillip LU (2014) In Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment 767. p.415-420
Abstract
Thermal neutron beams are an indispensable tool in physics research. The spatial and the temporal resolution attainable in experiments are dependent on the flux and collimation of the neutron beam which remain relatively poor, even for modern neutron sources. These difficulties may be mitigated by the use of optics for focusing and imaging. Refractive and diffractive optical elements, e.g. compound refractive lenses and Fresnel zone plates, are attractive due to their low cost, and simple alignment. These optical elements, however, suffer from chromatic aberration, which limit their effectiveness to highly monochromatic beams. This paper presents two novel concepts for focusing and imaging non-monochromatic thermal neutron beams with... (More)
Thermal neutron beams are an indispensable tool in physics research. The spatial and the temporal resolution attainable in experiments are dependent on the flux and collimation of the neutron beam which remain relatively poor, even for modern neutron sources. These difficulties may be mitigated by the use of optics for focusing and imaging. Refractive and diffractive optical elements, e.g. compound refractive lenses and Fresnel zone plates, are attractive due to their low cost, and simple alignment. These optical elements, however, suffer from chromatic aberration, which limit their effectiveness to highly monochromatic beams. This paper presents two novel concepts for focusing and imaging non-monochromatic thermal neutron beams with well-known optical elements: (1) a fast mechanical transfocator based on a compound refractive lens, which actively varies the number of individual lenses in the beam path to focus and image a time-of-flight beam, and (2) a passive optical element consisting of a compound refractive lens, and a Fresnel zone plate, which may focus and image both continuous and pulsed neutron beams. (C) 2014 Elsevier B.V. All rights reserve (Less)
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author
organization
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Contribution to journal
publication status
published
subject
keywords
Neutron optics, Neutron imaging, Compound refractive lenses, Zone, plates, Aberration, Microscopy
in
Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
volume
767
pages
415 - 420
publisher
Elsevier
external identifiers
  • wos:000344994600054
  • scopus:84908042443
ISSN
0167-5087
DOI
10.1016/j.nima.2014.09.031
language
English
LU publication?
yes
id
6e1bd334-c34e-4a84-b1aa-3dd80030fcb0 (old id 4982758)
date added to LUP
2015-01-27 11:28:28
date last changed
2017-10-22 04:24:46
@article{6e1bd334-c34e-4a84-b1aa-3dd80030fcb0,
  abstract     = {Thermal neutron beams are an indispensable tool in physics research. The spatial and the temporal resolution attainable in experiments are dependent on the flux and collimation of the neutron beam which remain relatively poor, even for modern neutron sources. These difficulties may be mitigated by the use of optics for focusing and imaging. Refractive and diffractive optical elements, e.g. compound refractive lenses and Fresnel zone plates, are attractive due to their low cost, and simple alignment. These optical elements, however, suffer from chromatic aberration, which limit their effectiveness to highly monochromatic beams. This paper presents two novel concepts for focusing and imaging non-monochromatic thermal neutron beams with well-known optical elements: (1) a fast mechanical transfocator based on a compound refractive lens, which actively varies the number of individual lenses in the beam path to focus and image a time-of-flight beam, and (2) a passive optical element consisting of a compound refractive lens, and a Fresnel zone plate, which may focus and image both continuous and pulsed neutron beams. (C) 2014 Elsevier B.V. All rights reserve},
  author       = {Poulsen, S. O. and Poulsen, H. F. and Bentley, Phillip},
  issn         = {0167-5087},
  keyword      = {Neutron optics,Neutron imaging,Compound refractive lenses,Zone,plates,Aberration,Microscopy},
  language     = {eng},
  pages        = {415--420},
  publisher    = {Elsevier},
  series       = {Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment},
  title        = {Refractive and diffractive neutron optics with reduced chromatic aberration},
  url          = {http://dx.doi.org/10.1016/j.nima.2014.09.031},
  volume       = {767},
  year         = {2014},
}