Hauptseite > Publikationsdatenbank > Design of an in-situ measurement system for ortho and para liquid hydrogen fractions at ESS > print

001     1006439
005     20250701125905.0
024 7 _ |a 10.1088/1757-899X/1240/1/012117
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024 7 _ |a 1757-8981
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024 7 _ |a 1757-899X
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024 7 _ |a 10.34734/FZJ-2023-01673
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037 _ _ |a FZJ-2023-01673
082 _ _ |a 530
100 1 _ |a Tatsumoto, H.
|0 P:(DE-HGF)0
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|e Corresponding author
245 _ _ |a Design of an in-situ measurement system for ortho and para liquid hydrogen fractions at ESS
260 _ _ |a London [u.a.]
|c 2022
|b Institute of Physics
336 7 _ |a article
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336 7 _ |a Journal Article
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336 7 _ |a ARTICLE
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336 7 _ |a JOURNAL_ARTICLE
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336 7 _ |a Journal Article
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520 _ _ |a The Cryogenic Moderator System (CMS) is equipped with a catalyst to convert hydrogen from the ortho state to the para state, to keep desirably high parahydrogen fractions in the cold moderators, which is required to deliver a high brightness cold neutron beams to the scientific instruments using neutron scattering. An in-situ measurement system for the ortho and para fractions of liquid hydrogen (OPMS) where a Raman spectroscopy will be used is being developed. The required measurement precision is 0.1% to detect an undesirable shift towards a high orthohydrogen fraction caused by neutron scattering driven para-to-ortho back conversion. The dedicated OPMS sampling line has been designed and is placed in a bypass line from and to the CMS to minimize the hydrogen inventory and to make it physically isolated from the CMS if a sapphire window failure happens. Accident analysis for a hydrogen leak due to the sapphire window failure was carried out using an inhouse-developed simulation code, and the required safety relief size has been determined.
536 _ _ |a 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4)
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588 _ _ |a Dataset connected to CrossRef, Journals: juser.fz-juelich.de
700 1 _ |a Lyngh, D.
|0 P:(DE-HGF)0
|b 1
700 1 _ |a Lee, Y.
|0 P:(DE-HGF)0
|b 2
700 1 _ |a Hartl, M.
|0 P:(DE-HGF)0
|b 3
700 1 _ |a Sina, H.
|0 P:(DE-HGF)0
|b 4
700 1 _ |a Beßler, Y.
|0 P:(DE-Juel1)143938
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700 1 _ |a Kobayashi, H.
|0 P:(DE-HGF)0
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700 1 _ |a Sakamoto, Y.
|0 P:(DE-HGF)0
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700 1 _ |a Hasegawa, T.
|0 P:(DE-HGF)0
|b 8
773 _ _ |a 10.1088/1757-899X/1240/1/012117
|g Vol. 1240, no. 1, p. 012117 -
|0 PERI:(DE-600)2506501-4
|n 1
|p 012117 -
|t IOP conference series / Materials science and engineering
|v 1240
|y 2022
|x 1757-8981
856 4 _ |u https://juser.fz-juelich.de/record/1006439/files/Design_of_an_in-situ_measurement_system_for_ortho_.pdf
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909 C O |o oai:juser.fz-juelich.de:1006439
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910 1 _ |a Forschungszentrum Jülich
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913 1 _ |a DE-HGF
|b Forschungsbereich Materie
|l Großgeräte: Materie
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|v Jülich Centre for Neutron Research (JCNS) (FZJ)
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914 1 _ |y 2023
915 _ _ |a Creative Commons Attribution CC BY 3.0
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