Thomas Hügle

TL;DR: The interaction of Ortho- and parahydrogen with the surfaces of these ortho-para conversion catalysts is investigated using neutron vibrational spectroscopy and X-ray/neutron pair distribution function measurements.

Abstract: Over the course of SNS operations, the neutronics team has observed indicators of a non-linear relationship between proton beam power and neutron brightness on multiple beamlines. As we prepare to replace the inner reflector plug, we have conducted our largest and most complete tests of this non-linearity in dedicated experiments. We will discuss our findings and subsequent experiments, their impact and our investigation of possible explanations for this behaviour.

Abstract: Simulation work is underway to identify a very cold neutron source solution that would provide an order of magnitude higher neutron output than the conventional moderator suite. Moderator candidates such as water ice, beryllium, ortho-D2, CH4, and neon all solid at temperatures of 4-6 K were investigated. At present no moderator option was able to achieve the set goal; ortho-D2 and CH4 seem to be the most promising options.

TL;DR: The hydrogen release behavior of both the pure hydrazine borane and the LiH mixture was studied at various temperatures and showed excellent hydrogen release rates at a reasonable temperature range of 100-150 degrees C.