Implementation of cross correlation for energy discrimination on the time-of-flight spectrometer CORELLI
| Autor: | Raymond Osborn, Stephan Rosenkranz, Feng Ye, Yaohua Liu, Ross Whitfield |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Cross-correlation Spectrometer business.industry Scattering cross-correlation technique Neutron diffraction 02 engineering and technology Neutron radiation 021001 nanoscience & nanotechnology 01 natural sciences Research Papers General Biochemistry Genetics and Molecular Biology Chopper Time of flight Reciprocal lattice Optics neutron diffraction 0103 physical sciences Physics::Accelerator Physics energy discrimination time-of-flight neutron beamlines 010306 general physics 0210 nano-technology business |
| Zdroj: | Journal of Applied Crystallography |
| ISSN: | 0021-8898 |
| Popis: | With implementation of the cross-correlation technique at the short-pulse Spallation Neutron Source (SNS), Oak Ridge, Tennessee, USA, CORELLI obtains both the total scattering and the elastic-only scattering simultaneously from a single measurement with an unprecedented data collection rate. The CORELLI instrument at Oak Ridge National Laboratory is a statistical chopper spectrometer designed and optimized to probe complex disorder in crystalline materials through diffuse scattering experiments. On CORELLI, the high efficiency of white-beam Laue diffraction combined with elastic discrimination have enabled an unprecedented data collection rate to obtain both the total and the elastic-only scattering over a large volume of reciprocal space from a single measurement. To achieve this, CORELLI is equipped with a statistical chopper to modulate the incoming neutron beam quasi-randomly, and then the cross-correlation method is applied to reconstruct the elastic component from the scattering data. Details of the implementation of the cross-correlation method on CORELLI are given and its performance is discussed. |
| Databáze: | OpenAIRE |
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