Recent studies of highly oriented pyrolytic graphite and hybrid graphite-silicon monochromator systems

0579666 - ÚJF 2024 RIV FR eng C - Conference Paper (international conference)
Freund, A. - Krencisz, D. - Crosby, M. - Chen, C. - Kozak, B. - Mikula, Pavol - Farkas, Gergely
Recent studies of highly oriented pyrolytic graphite and hybrid graphite-silicon monochromator systems.
EPJ Web of Conferences. Vol. 286. Les Ulis: e d p sciences, 2023, č. článku 03012. ISSN 2100-014X.
[European Conference on Neutron Scattering (ECNS 2023). Garching (DE), 20.03.2023-23.03.2023]
Research Infrastructure: CICRR - 90241
Institutional support: RVO:61389005
Keywords : neutron diffraction * HOPG
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
https://doi.org/10.1051/epjconf/202328603012

The excellent performance of highly oriented pyrolytic graphite (HOPG) as monochromator, analyzer and filter material for neutron instrumentation was discovered more than 50 years ago. Even though HOPG has been in use for a long time, there is still room for improvements regarding its optimized use in neutron beam conditioning. The features of a novel concept called POSI based on careful x-ray characterization of the HOPG crystals and on proven mounting and focusing technologies show that the efficiency of HOPG monochromators can be increased while decreasing complexity and cost. Moreover, by combining HOPG and bent perfect silicon crystals the functionality of separate single monochromators and analyzers can be expanded to a wider range of applications provided by dual systems or bichromators.
Permanent Link: https://hdl.handle.net/11104/0348478