A monolithic polycapillary focusing optic for polychromatic neutron diffraction applications

We have conducted measurements at five different thermal neutron wavelengths to determine the transmission characteristics of a tapered monolithic focusing lens with a focal length of 100 mm, suitable for time-of-flight diffraction. Both the width of the focused beam and the intensity gain of the op...

Full description

Saved in:
Bibliographic Details
Published in:Review of scientific instruments 2002-05, Vol.73 (5), p.1985-1993
Main Authors: Mildner, D. F. R., Chen-Mayer, H. H., Gibson, W. M., Gnäupel-Herold, T., Miller, M. E., Prask, H. J., Schultz, A. J., Vitt, R., Youngman, R.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have conducted measurements at five different thermal neutron wavelengths to determine the transmission characteristics of a tapered monolithic focusing lens with a focal length of 100 mm, suitable for time-of-flight diffraction. Both the width of the focused beam and the intensity gain of the optic increase as a function of wavelength. We have performed similar measurements on a polychromatic beam on a pulsed neutron source, where the results are subject to background from short wavelength neutrons. The use of a beryllium filter shows the increased effective gain for the longer wavelengths at the expense of an increased focused beam width by a factor of 2.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.1470236