Showing 28 results for Author: Thomas Huegle
Nov, 2023
Conference Paper
Liquid ammonia is an attractive intermediate temperature moderating material, offering a high hydrogen density, low tendency toward radiation-initiated polymerization, and broad accessible temperature range. The LENS collaboration has characterized decoupled poisoned liquid ammonia moderators in an attempt to validate scattering kernels we are generating. Additionally, we…
Aug, 2022
Journal
The VERsatile DIffractometer will set a new standard for a world-class magnetic diffractometer with versatility for both powder and single crystal samples and capability for wide-angle polarization analysis. The instrument will utilize a large single-frame bandwidth and will offer high-resolution at low momentum transfers and excellent signal-to-noise ratio. A horizontal e…
Mar, 2022
Journal
Molecular hydrogen exists in two spin-rotation coupled states: parahydrogen and orthohydrogen. Due to the variation of energy with rotational level, the occupation of ortho- and parahydrogen states is temperature dependent, with parahydrogen being the dominant species at low temperatures. The equilibrium at 20 K (99.8% parahydrogen) can be reached by natural conversion onl…
Feb, 2019
Conference Paper
Fundamental optical concepts are utilized across all fields of scientific instrumentation. In the case of beam-like systems in neutron scattering instrumentation (low-divergence trajectories taken over long distances), quantities describing a system can be scaled into dimensionless figures of merit that convey performance characteristics and geometric limits. Furthermore,…