Tests of Modulated Intensity Small Angle Scattering in time of flight mode

TL;DR

This paper reports on tests of the Modulated Intensity Small Angle Scattering (MISANS) technique at a neutron beamline, demonstrating its potential for studying magnetic samples under extreme conditions at pulsed neutron sources.

Contribution

First application of MISANS technique at a pulsed neutron source with successful testing on a magnetic sample and exploration of high magnetic field environments.

Findings

Demonstrated feasibility of MISANS at a pulsed neutron source.

Successfully tested on a MnSi magnetic sample.

Explored application of high magnetic fields during measurements.

Abstract

We report results of tests of the MISANS technique at the CG-1D beamline at High Flux Isotope Reactor (HFIR), Oak Ridge National Laboratory (ORNL). A chopper at 40 Hz simulated a pulsed neutron source at the beamline. A compact turn-key MISANS module operating with the pulsed beam was installed and a well characterised MnSi sample was tested. The feasibility of application of high magnetic fields at the sample position was also explored. These tests demonstrate the great potential of this technique, in particular for examining magnetic and depolarizing samples, under extreme sample environments at pulsed sources, such as the Spallation Neutron Source (SNS) or the planned European Spallation Source (ESS).