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Sr. Accelerator Physicist

Date: Feb 18, 2021

Location: Oak Ridge, TN, US, 37830

Company: Oak Ridge National Laboratory

Requisition Id 4825 


We are seeking an Accelerator Physicist who will focus on the strategic development of the SNS accelerator complex and its existing and future test facilities, breakthrough beam dynamics research, SNS upgrades, and support and improvement SNS operations, reliability, and availability.  This position resides in the Accelerator Physics Group in the Accelerator Science & Technology Section, Research Accelerator Division, Neutron Science Directorate at Oak Ridge National Laboratory (ORNL).  

Our group is responsible for the physics aspects and intellectual leadership for accelerator performance; for development and implementation of strategic plans for accelerator performance improvements and future upgrades; for enhancing the fundamental understanding of high power proton/H- linear accelerators and accumulator rings; and for seeking and obtaining externally funded research projects.  We develop and deploy high-level software tools that support efficient modeling, operation and data analytics for the SNS accelerator complex that may also be used by other major accelerator facilities.  The team provides individuals who serve as area physicists for parts of the accelerator complex. The team interacts heavily with all other technical teams and groups in the Research Accelerator Division.

This position reports to Accelerator Science & Technology Section head and Accelerator Physics Group leader.


Major Duties and Responsibilities: 

  • Conceptualizes future strategic development avenues of the SNS accelerator complex
  • Develops beam simulation models or tools to help understand high intensity beam physics and mechisms of beam loss
  • Helps diagnose and remedy machine issues and beam dynamics issues that are not understood
  • Develops lines of inquiry to understand or improve aspects of the SNS accelerator beam
  • Develops beam study plans, and participates in shifts to pursue the general lines of inquiry
  • Participates in scientific conferences, workshops, meetings and publishes results in the form of SNS technical notes and memos, workshop and conference proceedings, and scientific journals
  • Participates with other group members in developing goals, resource plans, and policies for the Group and the Section
  • Assists group leader in coordinating the work of graduate students in the team
  • Ensures compliance with environment, safety, health, and quality program requirements including ISMS


Basic Qualifications:

  • PhD degree in accelerator science, or a related discipline
  • 5 or more years of relevant technical experience in design, research and development, construction, commissioning, operation, maintenance and improvement of accelerator systems after degree.
  • Expert knowledge of accelerator physics science and/or beam instrumentation.


Preferred Qualifications:

  • A solid understanding of physics theory, particularly in the areas of accelerator physics and beam dynamics is essential
  • Experience working with an accelerator, such as experience working in a control room, conducting accelerator-based experiments, and performing accelerator simulations
  • Good mathematical and programming (Java, C++, Python) skills are highly desirable
  • 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 z

Other Job Requirements:
This position requires access to technology that is subject to export control requirements. Successful candidates must be qualified for such access without an export control license.


About Neutron Sciences Directorate:
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

Benefits at ORNL:
UT-Battelle offers a quality benefits package, including a matching 401(k), contributory pension plan, paid vacation, and medical/dental plan options.  Onsite amenities include a credit union, medical clinic, cafeteria, and fitness facilities.

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.

For more information about our benefits, working here, and living here, visit the “About” tab at




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.

We accept Word (.doc, .docx), Adobe (unsecured .pdf), Rich Text Format (.rtf), and HTML (.htm, .html) up to 5MB in size. Resumes from third party vendors will not be accepted; these resumes will be deleted and the candidates submitted will not be considered for employment.

If you have trouble applying for a position, please email

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.

Nearest Major Market: Knoxville