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Neutron transmission through pyrolytic graphite monochromators
Author(s) -
Mildner D. F. R,
Arif M.,
Werner S. A.
Publication year - 2001
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889801002254
Subject(s) - monochromator , beamline , pyrolytic carbon , optics , transmission (telecommunications) , wavelength , neutron , graphite , beam (structure) , highly oriented pyrolytic graphite , materials science , diffraction , thermal , physics , chemistry , nuclear physics , engineering , telecommunications , organic chemistry , pyrolysis , composite material , meteorology
Thermal neutron transmission measurements have been made as a function of wavelength on a pyrolytic graphite monochromator crystal that has been set to diffract a horizontal beam at different take‐off angles. The major dips in the transmission caused by the various reflections have been identified. These results can be used for the design of a beamline on which more than one instrument is placed. The transmission data show that it is best for the monochromator with the greatest (horizontal) take‐off angle to be placed upstream, with monochromators with decreasing take‐off angles progressively further downstream. The order of instruments for which the wavelength is greater than 0.43 nm is unimportant.