Setup for polarized neutron imaging using in situ 3He cells at the Oak Ridge National Laboratory High Flux Isotope Reactor CG-1D beamline

I Dhiman; Ralf Ziesche; Tianhao Wang; Hassina Bilheux; Lou Santodonato; X Tong; C Y Jiang; Ingo Manke; Wolfgang Treimer; Tapan Chatterji; Nikolay Kardjilov

doi:10.1063/1.5001525

Setup for polarized neutron imaging using in situ ³He cells at the Oak Ridge National Laboratory High Flux Isotope Reactor CG-1D beamline

Rev Sci Instrum. 2017 Sep;88(9):095103. doi: 10.1063/1.5001525.

Authors

Affiliations

¹ Neutron Science Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
² Helmholtz Centre Berlin for Materials and Energy, D-14109 Berlin, Germany.
³ Institute Laue-Langevin, 38042 Grenoble Cedex, France.

PMID: 28964173
DOI: 10.1063/1.5001525

Abstract

In the present study, we report a new setup for polarized neutron imaging at the ORNL High Flux Isotope Reactor CG-1D beamline using an in situ ³He polarizer and analyzer. This development is very important for extending the capabilities of the imaging instrument at ORNL providing a polarized beam with a large field-of-view, which can be further used in combination with optical devices like Wolter optics, focusing guides, or other lenses for the development of microscope arrangement. Such a setup can be of advantage for the existing and future imaging beamlines at the pulsed neutron sources. The first proof-of-concept experiment is performed to study the ferromagnetic phase transition in the Fe₃Pt sample. We also demonstrate that the polychromatic neutron beam in combination with in situ ³He cells can be used as the initial step for the rapid measurement and qualitative analysis of radiographs.