# Development of a portable high-Tc spherical neutron polarimetry device at the Oak Ridge National Laboratory

## TL;DR

Researchers developed a portable neutron polarimetry device using high-Tc superconducting materials to study complex magnetic structures.

## Contribution

A new spherical neutron polarimetry device using YBCO films and a design for pulsed neutron sources are introduced.

## Key findings

- A new spherical neutron polarimetry device called PHiTPAD was tested at Oak Ridge National Laboratory.
- A conceptual design for adapting the technique to pulsed neutron sources was proposed.
- The device uses high-Tc superconducting YBCO films for improved performance.

## Abstract

Spherical neutron polarimetry is a powerful polarized neutron scattering technique used to determine complex magnetic structures which are only partly accessible by other methods. This technique measures the full neutron polarization change upon scattering from a sample by fully decoupling the incoming and outgoing neutron polarization with a zero-field chamber placed at the sample position. Recent advancements and testing are presented for a new spherical neutron polarimetry device utilizing high-Tc superconducting YBCO films, PHiTPAD, at the High Flux Isotope Reactor at Oak Ridge National Laboratory. Furthermore, we introduce a conceptual design that utilizes wavelength-independent adiabatic transitions to adapt spherical neutron polarimetry for use with pulsed neutron sources, thereby expanding its potential applications in neutron scattering research.