Neutron Imaging Prototype Facility

CG-1D flight tubes

Neutron imaging beam line CG-1D.

The CG-1D beam is used for neutron imaging measurements and can be configured for white beam operation or can produce a pulsed beam when operating with a chopper. Apertures (with different diameters D (pinhole geometry) are used at the entrance of the helium-filled flight path to allow L/D variation from 400 to 800. L is the distance between the aperture and the detector (where the image is produced). Samples sit on a translation/rotation stage for alignment and tomography purposes. Detectors for CG-1D include charge-coupled device (CCD) cameras.

A micro-channel plate detector with a 40 micron spatial resolution is available upon request for time-of-flight neutron imaging experiments. 6LiF/ZnS scintillators varying from 50 to 200 microns are available. Work on neutron imaging specifically supports the development of the future VENUS instrument at SNS, which will be dedicated to neutron imaging with an emphasis on Bragg-edge contrast imaging.


Recent Features about Neutron Imaging Research Conducted at CG-1D

Instruments of Change

Quest / University of Tennessee – July 5, 2014

Jason Hayward, associate professor of nuclear engineering at the University of Tennessee, conducts neutron imaging research which will include work at the Versatile Neutron Imaging Instrument—being built in the coming years to be part of ORNL's Spallation Neutron Source. The instrument, also known as VENUS, will leverage enhanced neutron imaging capabilities to investigate the performance of engineering materials under operating conditions.

The full article is available here

ORNL team using neutron imaging to study cavitation inside GDI fuel injector

Green Car Congress – September 22, 2014

Researchers from the Fuels, Engines and Emissions Research Center (FEERC) at the Department of Energy's Oak Ridge National Laboratory and collaborators from ORNL's High Flux Isotope Reactor (HFIR) are using neutron imaging to study the formation of damage-causing bubbles in fuel injectors. When gas bubbles form in injectors, they disrupt the spray pattern and ultimately deteriorate the injector material properties.

The full article is available here


Applications

CG-1D flight tubes

Helium-filled aluminum flight tubes on CG-1D.

Energy Storage
Ion transport in energy storage materials; three-dimensional mapping of ions in electrodes

Technologies
Particulate deposition in vehicle parts; two-phase transport in heat pipes; multiphase constrained jet flows; metal casting; reservoir flow, creation, and production

Plant Systems Biology
Partitioning, transport, and fate of carbon fixed by plants; carbon biosequestration; modeling impacts of rising CO2 levels; modified bioenergy feedstock plants; cavitation and gas embolism in plants

Plant-Soil-Groundwater Systems
Transport and interactions of fluids in porous media, water infiltration and aquifer recharge, plant-plant and plant-fungal interactions, change in pore structure and voids after repeated thawing and freezing of permafrost soil

Biological and Forensic Studies
Structural, contrast agent, and cancer research

Food Science and Archeology
Water migration and degradation through time