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| 001 | 867785 | ||
| 005 | 20250701125913.0 | ||
| 037 | _ | _ | |a FZJ-2019-06395 |
| 041 | _ | _ | |a English |
| 100 | 1 | _ | |a Eisenhut, S. |0 P:(DE-HGF)0 |b 0 |
| 111 | 2 | _ | |a Workshop SCANS – A Compact Accelerator-Driven Neutron Source for Scandinavia? |c Institute for Energy Technology, Kjeller |d 2019-12-16 - 2019-12-17 |w Norway |
| 245 | _ | _ | |a Cryostat for the provision of liquid hydrogen with variable ortho-para-ratio for a low-dimensional cold neutron moderator |
| 260 | _ | _ | |c 2019 |
| 336 | 7 | _ | |a Conference Paper |0 33 |2 EndNote |
| 336 | 7 | _ | |a Other |2 DataCite |
| 336 | 7 | _ | |a INPROCEEDINGS |2 BibTeX |
| 336 | 7 | _ | |a conferenceObject |2 DRIVER |
| 336 | 7 | _ | |a LECTURE_SPEECH |2 ORCID |
| 336 | 7 | _ | |a Conference Presentation |b conf |m conf |0 PUB:(DE-HGF)6 |s 1576509431_1171 |2 PUB:(DE-HGF) |x Invited |
| 520 | _ | _ | |a A significant contribution to the enhancement of the neutron brilliance achievable with Compact Accelerator-driven Neutron Sources (CANS) can be made by an optimized cold moderator design. When using liquid para-H2 as the moderating medium, the concept of low-dimensional cold moderators can be employed to increase the neutron brightness (as currently foreseen at the European Spallation Source ESS). Para-H2 shows a drop in the scattering cross section by about one order of magnitude around 15 meV, resulting in large deviation between the mean free paths of thermal and cold neutrons. Taking advantage of this effect, the cold moderator geometry can be optimized to allow the intake of thermal neutrons through a relatively large envelope surface and then extracting them in an efficient way towards the neutron guides. One drawback of this solution is the lack of thermalization of the cold neutrons. In the context of the HBS (High Brilliance Source) project, efforts are made to overcome this problem by increasing the scattering cross section of the H2 in a defined way. The idea is to admix small amounts of ortho-H2, which maintains its large scattering cross section in the region below 15 meV. Like this, the neutron spectrum can be shifted towards lower energies and adjusted for the needs of the respective instrument. In a cooperation between TU Dresden and FZ Jülich, an experimental setup has been created to proof the feasibility of this concept. The main component of the experimental setup is a LHe-cooled flow cryostat that enables the separate condensation of a para-H2 and a normal-H2 flow and a subsequent mixing of the two in precise proportions. The resulting LH2 mixture at 17 – 20 K is fed into a small cold moderator vessel (approx. 200 ml). In this work, the current status of the setup is presented. The construction and commissioning of the mixing cryostat have been completed and extensive test runs show that different, stable ortho-para-H2 mixtures can be produced and monitored. Currently, preparations for first measurements of the resulting neutron spectra are being prepared at Forschungszentrum Jülich. |
| 536 | _ | _ | |a 144 - Controlling Collective States (POF3-144) |0 G:(DE-HGF)POF3-144 |c POF3-144 |f POF III |x 0 |
| 536 | _ | _ | |a 524 - Controlling Collective States (POF3-524) |0 G:(DE-HGF)POF3-524 |c POF3-524 |f POF III |x 1 |
| 536 | _ | _ | |a 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) |0 G:(DE-HGF)POF3-6212 |c POF3-621 |f POF III |x 2 |
| 536 | _ | _ | |a 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) |0 G:(DE-HGF)POF3-6213 |c POF3-621 |f POF III |x 3 |
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| 700 | 1 | _ | |a Klaus, M. |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Baggemann, J. |0 P:(DE-Juel1)169802 |b 2 |
| 700 | 1 | _ | |a Rücker, U. |0 P:(DE-Juel1)130928 |b 3 |
| 700 | 1 | _ | |a Beßler, Y. |0 P:(DE-Juel1)143938 |b 4 |
| 700 | 1 | _ | |a Haberstroh, C. |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Cronert, T. |0 P:(DE-Juel1)164368 |b 6 |
| 700 | 1 | _ | |a Gutberlet, T. |0 P:(DE-Juel1)168124 |b 7 |u fzj |
| 700 | 1 | _ | |a Brückel, T. |0 P:(DE-Juel1)130572 |b 8 |
| 700 | 1 | _ | |a Lange, C. |0 P:(DE-HGF)0 |b 9 |
| 909 | C | O | |o oai:juser.fz-juelich.de:867785 |p VDB |
| 910 | 1 | _ | |a Forschungszentrum Jülich |0 I:(DE-588b)5008462-8 |k FZJ |b 2 |6 P:(DE-Juel1)169802 |
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| 913 | 1 | _ | |a DE-HGF |l Future Information Technology - Fundamentals, Novel Concepts and Energy Efficiency (FIT) |1 G:(DE-HGF)POF3-140 |0 G:(DE-HGF)POF3-144 |2 G:(DE-HGF)POF3-100 |v Controlling Collective States |x 0 |4 G:(DE-HGF)POF |3 G:(DE-HGF)POF3 |b Energie |
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| 913 | 1 | _ | |a DE-HGF |b Forschungsbereich Materie |l Von Materie zu Materialien und Leben |1 G:(DE-HGF)POF3-620 |0 G:(DE-HGF)POF3-621 |2 G:(DE-HGF)POF3-600 |v In-house research on the structure, dynamics and function of matter |9 G:(DE-HGF)POF3-6212 |x 2 |4 G:(DE-HGF)POF |3 G:(DE-HGF)POF3 |
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| 913 | 1 | _ | |a DE-HGF |b Forschungsbereich Materie |l Von Materie zu Materialien und Leben |1 G:(DE-HGF)POF3-620 |0 G:(DE-HGF)POF3-623 |2 G:(DE-HGF)POF3-600 |v Facility topic: Neutrons for Research on Condensed Matter |9 G:(DE-HGF)POF3-6G4 |x 4 |4 G:(DE-HGF)POF |3 G:(DE-HGF)POF3 |
| 914 | 1 | _ | |y 2019 |
| 920 | 1 | _ | |0 I:(DE-Juel1)JCNS-2-20110106 |k JCNS-2 |l Streumethoden |x 0 |
| 920 | 1 | _ | |0 I:(DE-Juel1)PGI-4-20110106 |k PGI-4 |l Streumethoden |x 1 |
| 920 | 1 | _ | |0 I:(DE-82)080009_20140620 |k JARA-FIT |l JARA-FIT |x 2 |
| 920 | 1 | _ | |0 I:(DE-Juel1)JCNS-HBS-20180709 |k JCNS-HBS |l High Brilliance Source |x 3 |
| 920 | 1 | _ | |0 I:(DE-Juel1)ZEA-1-20090406 |k ZEA-1 |l Zentralinstitut für Technologie |x 4 |
| 980 | _ | _ | |a conf |
| 980 | _ | _ | |a VDB |
| 980 | _ | _ | |a I:(DE-Juel1)JCNS-2-20110106 |
| 980 | _ | _ | |a I:(DE-Juel1)PGI-4-20110106 |
| 980 | _ | _ | |a I:(DE-82)080009_20140620 |
| 980 | _ | _ | |a I:(DE-Juel1)JCNS-HBS-20180709 |
| 980 | _ | _ | |a I:(DE-Juel1)ZEA-1-20090406 |
| 980 | _ | _ | |a UNRESTRICTED |
| 981 | _ | _ | |a I:(DE-Juel1)ITE-20250108 |
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