ANSTO Publications Online >
Journal Publications >
Journal Articles >

Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/3762

Title: The ABC of powder diffractometer detector coverage
Authors: Andersen, KH
Bentley, PM
Cussen, LD
Keywords: Diffractometers
Radiation Detectors
Powers
Neutron Spectrometers
Cylindrical Configuration
Scattering
Issue Date: 1-Apr-2011
Publisher: Wiley-Blackwell
Citation: Andersen, K.H., Bentley, P.M., Cussen, L.D. (2011). The ABC of powder diffractometer detector coverage. Journal of Applied Crystallography, 44(Part 2), 295-298.
Abstract: This article addresses the question of the most effective detector configuration for neutron spectrometers using a discussion of a particular case - constant-wavelength powder diffractometers at continuous neutron sources. A first variation uses an essentially one-dimensional `banana' detector coupled with out-of-scattering-plane beam divergence before and after the sample. A second variation uses an incident beam tightly defined both in- and out-of-plane coupled to a `4 pi' detector covering all possible scattering angles after the sample. It is widely believed that the 4 pi arrangement is superior for most varieties of neutron spectrometer but is more difficult and more expensive to implement. Starting from a commonly used overall instrument figure-of-merit, this article presents simple arguments leading to the surprising conclusion that this is untrue for these constant-wavelength powder diffractometers, provided only that the cylindrical samples used with the banana detector have a height greater than 2.4 times their diameter. © 2011, Wiley-Blackwell. The definitive version is available at www3.interscience.wiley.com
URI: http://dx.doi.org/10.1107/S0021889811005498
http://apo.ansto.gov.au/dspace/handle/10238/3762
ISSN: 0021-8898
Appears in Collections:Journal Articles

Files in This Item:

There are no files associated with this item.

Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback