Postdoctoral Research Associate

About the Role

We are seeking a Computational Physicist to carry out modeling of plasma transport and plasma-material interactions (PMI) in the Materials Plasma Exposure eXperiment (MPEX). This role involves utilizing state-of-the-art 3D plasma boundary simulation tools as part of the MPEX Whole-Device Model, working closely with the experimental team to understand the device's PMI physics and optimize performance. The position is within the Power Exhaust and Particle Control (PEPC) group of the Fusion Energy Division at Oak Ridge National Laboratory.

Key Responsibilities

• Perform interpretive three-dimensional boundary plasma simulations of MPEX to inform and optimize RF power coupling, PMI target conditions, and overall device performance.
• Integrate boundary plasma simulations with impurity transport models to assess the production and transport of in-vessel impurities.
• Perform predictive modeling to inform the design of new MPEX target geometries, focusing on improving access to divertor-relevant target exposure conditions.
• Validate simulation results against experimental data and constrain code inputs to reduce uncertainty in predictions and guide improvements to the physics model.
• Work closely with teams of diagnosticians, theorists, applied mathematicians, and experimental plasma physicists.
• Create high-impact research results for reporting in peer-reviewed journals and presentation at scientific conferences.

Requirements & Tech Stack

• PhD in Plasma Physics, Electrical Engineering, Nuclear Engineering, or a closely related field completed within the last 5 years, or expect to complete a PhD by June 30th, 2027.
• Experience with boundary and divertor plasma physics.
• Experience in the use of codes such as EMC3-EIRENE, SOLPS, UEDGE, SOLEDGE, or similar.
• Experience with plasma-material interactions, including models for sputtering, impurity transport, and sheath physics.
• Programming experience in Python, MATLAB, Fortran, C++, and other science-relevant languages.
• Ability to work individually and/or as part of a team, set priorities, accomplish multiple tasks within deadlines, and adapt to changing needs.
• Excellent oral and written communication skills.

Additional Information

• This is a temporary 24-month position with the potential for extension based on performance and funding.
• Employment at Oak Ridge National Laboratory (ORNL) requires a Real ID compliant form of identification and the ability to obtain and maintain a federal Personal Identity Verification (PIV) card after a favorable post-employment background investigation, including a declaration of illegal drug activities within the last year.
• If you have not resided in the U.S. for three consecutive years, an LSSO risk determination is required initially, with a PIV credential required upon meeting the residency requirement.