Phase space optimisation of the USANS instrument Kookaburra at the ANSTO OPAL reactor

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dc.contributor.authorFreund, AKen_AU
dc.contributor.authorRehm, Cen_AU
dc.date.accessioned2011-12-06T00:47:19Zen_AU
dc.date.available2011-12-06T00:47:19Zen_AU
dc.date.issued2011-04-01en_AU
dc.date.statistics2011-12-06en_AU
dc.description.abstractAn optimisation of the USANS instrument Kookaburra has been conducted determining the most efficient type of premonochromator crystal and scattering geometry. The approach has been based on representations in phase space combining direct and reciprocal space diagrams. Results are presented for several scenarios involving flat and curved, perfect and mosaic crystals, horizontal and vertical scattering planes. The highest peak current density of 1.7 x 10(5) cm(-2) s(-1) is provided for a wavelength of 4.43 angstrom by a doubly curved pyrolytic graphite premonochromator diffracting in a horizontal plane and producing a beam size of about 50 cm(2) at the sample position. The smallest background is achieved for a wavelength of 2.56 angstrom and a vertical scattering plane using a bent perfect premonochromator crystal and optionally a collimator to decrease the divergence of the beam exiting the cold neutron guide. For this wavelength a peak current density of 6.6 x 10(4) cm(-2) s(-1) is collected into a sample area of 10 cm(2). The bent perfect crystal design is of particular advantage for small samples. (C) 2010 Elsevier B.V.en_AU
dc.identifier.citationFreund, A.K., Rehm, C. (2011). Phase space optimisation of the USANS instrument Kookaburra at the ANSTO OPAL reactor. Paper presented to the International Workshop on Neutron Optics NOP2010, 17-19 March 2010, Alpe d'Huez, France. In Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 634(1, Supplement), S81-S89.en_AU
dc.identifier.conferenceenddate29 March 2010en_AU
dc.identifier.conferencenameInternational Workshop on Neutron Optics NOP2010en_AU
dc.identifier.conferenceplaceAlpe d'Huez, Franceen_AU
dc.identifier.conferencestartdate17 March 2010en_AU
dc.identifier.govdoc3811en_AU
dc.identifier.issn0021-9797en_AU
dc.identifier.issue1, Supplementen_AU
dc.identifier.journaltitleNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipmenten_AU
dc.identifier.paginationS81-S89en_AU
dc.identifier.urihttps://doi.org/10.1016/j.nima.2010.06.260en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3917en_AU
dc.identifier.volume634en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPhase spaceen_AU
dc.subjectANSTOen_AU
dc.subjectOPAL Reactoren_AU
dc.subjectNeutronsen_AU
dc.subjectSmall angle scatteringen_AU
dc.subjectOpticsen_AU
dc.titlePhase space optimisation of the USANS instrument Kookaburra at the ANSTO OPAL reactoren_AU
dc.title.alternativeProceedings of the International Workshop on Neutron Optics NOP2010, 17-19 March 2010, Alpe d'Huez, Franceen_AU
dc.typeConference Paperen_AU
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