Comparison between Pulsed Cold Neutron Intensities from Liquid Hydrogen Moderator and from Solid Methane Moderator in Decoupling Type Moderator Assembly

Compact thermal neutron sensors for moderator-based neutron spectrometers.

In the framework of the NESCOFI@BTF project of the Italian Institute of Nuclear Physics, different types of active thermal neutron sensors were studied by coupling semiconductor devices with a suitable radiator. The objective was to develop a detector of small dimensions with a proper sensitivity to use at different positions in a novel moderating assembly for neutron spectrometry. This work di...

MODERATOR : Anthony

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Neutron Moderator Development Research at the Low Energy Neutron Source

The Low Energy Neutron Source at Indiana University completed its construction phase roughly three years ago, and one of the more active research thrusts at the facility since that time has been our attempts to advance the state of the art in neutron moderation. This research program includes basic materials characterization, especially total neutron cross section measurements, as well as in-si...

Program Chair and Moderator

II-3. Development of Cryogenic Moderators Using a Small Proton Accelerator

Liquid para-hydrogen has smaller scattering cross section than those of normal hydrogen at an energy region below about 15 meV, and the para-rich-hydrogen moderators might decrease the width of the cold neutron pulses emitted from the moderators due to low up-scattering cross-section in para-hydrogen. We developed a hydrogen gas supply system to convert ortho-hydrogen to para-hydrogen using an ...