The CG-1D Neutron Imaging Beamline at the Oak Ridge National Laboratory High Flux Isotope Reactor

The Oak Ridge National Laboratory Neutron Sciences Directorate has installed a neutron imaging beamline at the High Flux Isotope Reactor (HFIR) cold guide hall. CG-1D is one of the three instruments that make up the CG1 instrument suite. The beamline optics and detector have recently been upgraded t...

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Bibliographic Details
Published inPhysics procedia Vol. 69; pp. 104 - 108
Main Authors Santodonato, Lou, Bilheux, Hassina, Bailey, Barton, Bilheux, Jean, Nguyen, Phong, Tremsin, Anton, Selby, Doug, Walker, Lakeisha
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2015
Subjects
aperture
beamline optics
CCD
cold neutrons
diffuser
MCP
neutron radiography
beamline optics
aperture
cold neutrons
CCD
diffuser
MCP
neutron radiography
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Summary:The Oak Ridge National Laboratory Neutron Sciences Directorate has installed a neutron imaging beamline at the High Flux Isotope Reactor (HFIR) cold guide hall. CG-1D is one of the three instruments that make up the CG1 instrument suite. The beamline optics and detector have recently been upgraded to meet the needs of the neutron imaging community (better “smoothing” of guide system artifacts, higher flux or spatial resolution). These upgrades comprise a new diffuser/aperture system, two new detectors, a He-filled flight tube and silicon (Si) windows. Shielding inside the flight tube, beam scrapers and a beam stop ensure that biological dose is less than 50μSv/hr outside of the radiation boundary. A set of diffusers and apertures (pinhole geometry) has been installed at the exit of the guide system to allow motorized L/D variation. Samples sit on a translation/rotation stage for alignment and tomography purposes. Detectors for the CG-1D beamline are (1) an ANDOR DW936 charge coupled device (CCD) camera with a field of view of approximately 7cm x 7cm and ∼ 80 microns spatial resolution and 1 frame per second time resolution, (2) a new Micro-Channel Plate (MCP) detector with a 2.8cm x 2.8cm field of view and 55 microns spatial resolution, and 5μs timing capability. 6LiF/ZnS scintillators of thickness varying from 50 to 200 microns are being used at this facility. An overview of the beamline upgrade and preliminary data is presented here.
ISSN:1875-3892
1875-3892
DOI:10.1016/j.phpro.2015.07.015