Regensburg 2019 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 28: Cryotechnique: Refrigeration and Thermometry
TT 28.6: Talk
Tuesday, April 2, 2019, 12:30–12:45, H23
Development of a liquid hydrogen moderator with a free adjustable ortho/para ratio for the provision of specific cold neutron spectra — •Johannes Baggemann1, Tobias Cronert1, Ulrich Rücker1, Paul Zakalek1, Paul-Emmanuel Doege1, Thomas Gutberlet1, Sarah Boehm2, Marcel Klaus3, Sebastian Eisenhut3, and Thomas Brückel1 — 1Forschungszentrum Jülich GmbH — 2RWTH Aachen University — 3TU Dresden
Neutron scattering as a method for studying structure and dynamics of condensed matter offers unique opportunities for a wide field of application. Under the frame of the High Brilliance Neutron Source (HBS) project, the Jülich Centre for Neutron Science is developing a new type of scalable accelerator driven pulsed neutron source. One of the projects objectives is to make the scattering method more accessible in regards to costs, lead times and restrictions. The design of the source enables an optimization along the whole neutron production chain towards the needs of each scattering experiment and fully offset the low neutron production.
One of the key components of this optimization is the development of a novel low dimensional liquid hydrogen neutron moderator with a variable ortho/para ratio. By adjusting this ratio, an optimal neutron energy spectrum could be delivered to a particular scattering experiment. After a brief introduction to the project, the fundamentals of the liquid ortho/para mixture as neutron moderator will be presented. The state of the development of the hydrogen moderator as well as its potential that must be determined experimentally will be outlined.