[Neutron] ORNL- Postdoctoral Research Associate in Neutron Imaging and Diffraction/ NB50431854

McCormick, B. Logan mccormickbl at ornl.gov
Mon Oct 19 15:22:49 CEST 2015

ORNL Publications
External Publication
Job Posting Title
Postdoctoral Research Associate in Neutron Imaging and Diffraction/ NB50431854

Posted Date

End Posting Date

The Neutron Sciences Directorate (NScD) at Oak Ridge National Laboratory (ORNL) operates the High Flux Isotope Reactor
(HFIR), the United States' highest flux reactor based neutron source, and the Spallation Neutron Source (SNS), the world's
most intense pulsed accelerator based neutron source. Together these facilities operate 30 instruments for neutron scattering
research, each year carrying out in excess of 1,000 experiments in the physical, chemical, materials, biological and medical
sciences for more than 3,000 visiting scientists. HFIR also provides unique facilities for isotope production and neutron
irradiation. To learn more about Neutron Sciences at ORNL go to: http://neutrons.ornl.gov.
The Chemical and Engineering Materials Division of the NScD at Oak Ridge National Laboratory is seeking motivated
candidates for a postdoctoral research associate position in neutron imaging and diffraction. With the advent of instruments
such as the HFIR CG-1D cold imaging beamline, it has now become possible to obtain high-spatial resolution 2 and
3-dimensional neutron imaging data of a series of advanced materials. Information about the CG-1D facility can be found at:
http://neutrons.ornl.gov/imaging/. The SNS engineering materials diffractometer VULCAN provides rapid volumetric mapping
of strains in large specimens. More information about VULCAN can be found at: http://neutrons.ornl.gov/vulcan
The successful candidate will join an interdisciplinary research team with expertise in neutron scattering, advanced
manufacturing and modeling. This person will also have the opportunity to collaborate with VULCAN and CG-1D beamlines,
when the research interests are aligned.

Major Duties/Responsibilities
- Uses a combination of materials synthesis and in situ neutron imaging and diffraction to study additive manufacturing
materials. Publish scientific papers on this collaborative research.
- Performs neutron imaging and diffraction studies at the various world-class instruments at the SNS and HFIR.
- Works with the neutron imaging and diffraction teams and the industry (Scientific Associates, Engineer, Software
Developer) and with scientists and other ORNL staff members to develop proof-of-concept techniques for additive
manufacturing at the CG-1D and VULCAN beamline, including taking a lead role in sample environment design and testing,
and working under the direct supervision of both lead imaging and diffraction scientists.
- Contributes to the application of energy selective capabilities (i.e. time-of-flight) to additive manufacturing materials.
- Programs and validate algorithms for fitting time-of-flight imaging data.
- Publishes research results in scientific journals, maintains a strong commitment to the implementation and perpetuation of
values and ethics and ensures compliance with environmental, safety, health and quality program requirements.
- Physical requirements for this job include the use of hand and eye protection gear, kneeling, sitting for extended periods of
time, extensive work at chemical laboratories, and possible exposure to ionization radiation normally associated with
operation of neutron scattering instruments for scientific research.

Qualifications Required
Candidates with a recent Ph.D. in Physics, Materials Science, Engineering, or related fields will be considered. Experience in
neutron and/or X-ray imaging and/or diffraction and computer analysis/programming/modeling is required. Strong written and
oral communication skills and the desire to work in a team environment on scientifically challenging problems are required.
Applicants must have received their PhD within five years of this application and must complete all degree requirements
before starting their appointment.
Qualifications Desired:
Preference will be given to those candidates with experience with using an x-ray and/or neutron imaging and/or diffraction
beamline. Expertise in additive manufacturing is preferred. Experience in software reconstruction, 2D and 3D image
visualization and quantitative analysis is desired. Knowledge of strain mapping and data reduction by diffraction is a plus.
Expertise in time-of-flight neutron diffraction and imaging techniques is preferred. Neutron simulations using Monte Carlo
based software (McStas and/or MCNP-X) is preferred. Knowledge in Python language is preferred.
Contact Dr. Hassina Z. Bilheux at bilheuxhn at ornl.gov for questions about this position. Please reference the position title
and number in the correspondence.
Applicants cannot have received the most recent degree more than five years prior to the date of application and must
complete all degree requirements before starting their appointment. Certain exceptions may be considered. This position is a
temporary, full-time assignment for 12 months, renewable up to 2 times upon performance assessment of candidate.
This position will remain open for a minimum of 5 days after which it will close when a qualified candidate is identified and/or

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