We discuss an experimental approach to determine the concentration of para-H-2 in the hydrogen moderators serving the Target Stations 1 and 2 at ISIS. The outcome of the measurements based on this approach is crucial for the Target Station 1 project, where a detailed characterisation of the present performance is needed to test neutronics simulations. The approach described here is based on the measurement of neutron transmission spectra over a wide energy range of samples extracted from the moderators. Pilot experiments were performed on the VESUVIO spectrometer at ISIS and were combined with measurements of thermal conductivity of the same samples using the ISIS para-H-2 rig.
Romanelli, G., Rudic, S., Krzystyniak, M., Fernandez-Alonso, F., Fornalski, D., Kibble, M., et al. (2018). Robust measurement of para-ortho H2 ratios to characterise the ISIS hydrogen moderators. JOURNAL OF PHYSICS. CONFERENCE SERIES, 1021(1) [10.1088/1742-6596/1021/1/012055].
Robust measurement of para-ortho H2 ratios to characterise the ISIS hydrogen moderators
Romanelli G.
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2018-01-01
Abstract
We discuss an experimental approach to determine the concentration of para-H-2 in the hydrogen moderators serving the Target Stations 1 and 2 at ISIS. The outcome of the measurements based on this approach is crucial for the Target Station 1 project, where a detailed characterisation of the present performance is needed to test neutronics simulations. The approach described here is based on the measurement of neutron transmission spectra over a wide energy range of samples extracted from the moderators. Pilot experiments were performed on the VESUVIO spectrometer at ISIS and were combined with measurements of thermal conductivity of the same samples using the ISIS para-H-2 rig.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
