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Computational Physicist

Date: May 11, 2022

Location: Oak Ridge, TN, US, 37830

Company: Oak Ridge National Laboratory

Requisition Id 8018 


Oak Ridge National Laboratory is the largest US Department of Energy science and energy laboratory, conducting basic and applied research to deliver transformative solutions to compelling problems in energy and security.


We are seeking a Computational Physicist who will support the Fusion Energy Dicision in the Fusion and Fission Energy Science Directorate at Oak Ridge National Laboratory (ORNL).  


Major Duties/Responsibilities: 

  • Simulate impurity production and transport on the Proto-MPEX and MPEX devices. This includes upgrading the existing simulation capability to account for multiple impurity species and materials, and simulations of the mixed materials expected to be present in MPEX.
  • Simulate the impurity production and transport associated with radio-frequency heating in the ion-cyclotron range of frequencies, particularly on the WEST and C-Mod devices and in high-geometric fidelity to account for the antenna and limiter structures. This includes the implemenatation of synthetic diagnostics, and the subsequent interpretation of existing experimental observations on the same devices.  
  • Compare predictions from 2D codes (e.g., SOLPS, SOLEDGE2D, DIVIMP) with 3D codes (e.g., GITR) to help in assessing impurity generation from main chamber limiters, both passive and active limiters, so wall protection and RF protection.
  • Be the main person responsible for interfacing between computational and experimental effort towards understanding impurity generation and migration in the various toroidal facilities ORNL participates in (like WEST and ITER).   
  • Upgrade the existing steady-state simulation capability to incorporate time-dependence for Tokamak scenarios where transient plasma phenomenia in the boundary are expected to have significant impact on the material response of the plasma facing components. 


Basic Qualifications:

  • A PhD in computational physics, plasma physics, plasma-material interactions, nuclear engineering, or a related field and a minimum of 2 years experience. A combination of education and experience may also be considered.


Preferred Qualifications:

  • Experience in the use and development of the Global Impurity Transport (GITR) code.
  • C++ and parallel programming. 
  • Excellent written and oral communication skills
  • Motivated self-starter with the ability to work independently and to participate creatively in collaborative teams across the laboratory 
  • Ability to function well in a fast-paced research environment, set priorities to accomplish multiple tasks within deadlines, and adapt to ever changing needs


Moving can be overwhelming and expensive. UT-Battelle offers a generous relocation package to ease the transition process. Domestic and international relocation assistance is available for certain positions. If invited to interview, be sure to ask your Recruiter (Talent Acquisition Partner) for details.

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This position will remain open for a minimum of 5 days after which it will close when a qualified candidate is identified and/or hired.

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ORNL is an equal opportunity employer. All qualified applicants, including individuals with disabilities and protected veterans, are encouraged to apply.  UT-Battelle is an E-Verify employer.

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