Flux-enhanced monochromator by ultrasound excitation of annealed Czochralski-grown silicon crystals View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2003-04

AUTHORS

S. Köhler, R. Hock, C. Seitz, A. Magerl, E. Mashkina, A. Demin

ABSTRACT

. The neutron flux from monochromator crystals can be increased by ultrasound excitation or by strain fields. Rocking curves of both a perfect float-zone silicon crystal and an annealed Czochralski silicon crystal with oxygen precipitates were measured at various levels of ultrasound excitation on a cold-neutron backscattering spectrometer. We find that the effects of the dynamic strain field from the ultrasound and the static strain field from the defects are not additive. Rocking curves were also taken at different ultrasound frequencies near resonance of the crystal/ultrasound-transducer system with a time resolution of 1 min. Pronounced effects of crystal heating are observed, which render the conditions for maximum neutron reflectivity delicate. More... »

PAGES

935-938

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s003390201416

DOI

http://dx.doi.org/10.1007/s003390201416

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1007407470


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