Methods to maximize detector count rates on small-angle neutron scattering diffractometers at reactor sources: II. Optimizing sample, source and detector sizes

Published

February 1, 2024

Author(s)

John Barker

Abstract

Methods for maximizing the detector count rate for the same scattering angle range and resolution are related to choosing the optimum pinhole collimation parameters which include the source and sample aperture sizes and collimation lengths on small-angle neutron scattering diffractometers located at reactor neutron sources. Calculations and experimental measurements are presented that show further enhancements in count rate can be achieved by using new larger sample cells that increase the sample diameter from the current standard size of 19 mm to 40 mm. To accommodate the larger beam sizes at the detector, existing and new detector placement strategies are presented to extend the scattering angle range beyond what is capable with a single 2-D detector.

Citation

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Volume

1059

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.nima.2023.168973

Local Download

Keywords

a single 2-D detector.Neutron scattering, Small-angle scattering, Pinhole collimation, Diffractometer optimization, Diffractometer resolution, Detector layout, Nuclear reactor

Citation

Barker, J. (2024), Methods to maximize detector count rates on small-angle neutron scattering diffractometers at reactor sources: II. Optimizing sample, source and detector sizes, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, [online], https://doi.org/10.1016/j.nima.2023.168973, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=956462 (Accessed October 7, 2025)