Neutron optical imaging study of neutron moderator and beam extraction system

J. Füzi, E. Dávid, T. Kozlowski, P. Lewis, G. Messing, F. Mezei, S. Penttila, L. Rosta, M. Russina, G. Török

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The study of the performance of a cold-hydrogen moderator and a supermirror-based neutron beam extraction system of the flight path 12 at LANSCE has been performed based on energy-resolved neutron optical imaging. We have developed a pinhole camera system with a 2D position-sensitive 3He multiwire proportional chamber neutron detector with delay line position encoding (0.75 mm pixel size), together with a standalone time-of-flight electronic system with 1.2 μs dead time. We have determined the efficiency, resolution, and counting rate saturation of the detector. In particular, we have considered an impact of these parameters on the quality of the images. The neutron images of the moderator were taken as a function of the neutron wavelength given by the time-of-flight information. The images were recorded as arrays of 256×256×2000 pixels; x and y coordinates, and time of flight. Information obtained from the images includes a distribution of the brightness on the neutron moderator, the efficiency and geometrical accuracy of the beam extraction system, and the reflectivity of the supermirror-coated elements of its optics. Our results demonstrate that the pinhole optical camera-based neutron imaging method combined with time-of-flight information is an extremely efficient tool to characterize neutron sources and neutron beam extraction systems.

Original languageEnglish
Pages (from-to)1315-1317
Number of pages3
JournalPhysica B: Condensed Matter
Volume385-386
DOIs
Publication statusPublished - Nov 15 2006

Fingerprint

Particle beam extraction
moderators
Moderators
Neutrons
Imaging techniques
neutrons
Neutron beams
neutron beams
Pixels
pixels
Pinhole cameras
pinhole cameras
Neutron detectors
flight paths
Flight paths
neutron counters
Neutron sources
Electric delay lines
pinholes
delay lines

Keywords

  • Neutron imaging
  • Neutron optics
  • Spallation sources

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Neutron optical imaging study of neutron moderator and beam extraction system. / Füzi, J.; Dávid, E.; Kozlowski, T.; Lewis, P.; Messing, G.; Mezei, F.; Penttila, S.; Rosta, L.; Russina, M.; Török, G.

In: Physica B: Condensed Matter, Vol. 385-386, 15.11.2006, p. 1315-1317.

Research output: Contribution to journalArticle

Füzi, J, Dávid, E, Kozlowski, T, Lewis, P, Messing, G, Mezei, F, Penttila, S, Rosta, L, Russina, M & Török, G 2006, 'Neutron optical imaging study of neutron moderator and beam extraction system', Physica B: Condensed Matter, vol. 385-386, pp. 1315-1317. https://doi.org/10.1016/j.physb.2006.06.062
Füzi J, Dávid E, Kozlowski T, Lewis P, Messing G, Mezei F et al. Neutron optical imaging study of neutron moderator and beam extraction system. Physica B: Condensed Matter. 2006 Nov 15;385-386:1315-1317. https://doi.org/10.1016/j.physb.2006.06.062
Füzi, J. ; Dávid, E. ; Kozlowski, T. ; Lewis, P. ; Messing, G. ; Mezei, F. ; Penttila, S. ; Rosta, L. ; Russina, M. ; Török, G. / Neutron optical imaging study of neutron moderator and beam extraction system. In: Physica B: Condensed Matter. 2006 ; Vol. 385-386. pp. 1315-1317.
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