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RF System Scientist

Date: Jun 17, 2022

Location: Oak Ridge, TN, US, 37830

Company: Oak Ridge National Laboratory

Requisition Id 8307 


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:


The Research Accelerator Division (RAD) within NScD invites applications for a Linac Systems RF Engineer/Scientist position in its RF Systems Group within the Accelerator Systems Section. The purpose of the Linac Systems Scientist is to ensure on-going success in safe and reliable operation, maintenance, and improvement of the SNS Linac. The SNS Linac consists of a combination of room temperature and superconducting structures and is the first accelerator that uses superconducting radio-frequency (SRF) technology for a pulsed proton machine. The SNS Linac produces 1-GeV, 1.4-MW negative hydrogen beam (1.3 GeV, 2.8 MW capable after the proton power upgrade) and is now considered to be the world’s leading high-power proton accelerator facility. The Accelerator Systems Section manages all SNS RF structures (RFQ, Rebunchers, DTL, CCL, Cryomodules and Ring RF), HPRF systems, LLRF systems, ion source RF systems, Central Helium Refrigerator (CHL) systems, high voltage convertor modulators, pulsed power systems, DC power supplies for magnets and related test facilities/test stands.


Major Duties/Responsibilities: 

  • Lead or participate in the development program for Linac Normal Conducting (NCL) RF structures and ancillary parts/components.
  • Perform measurements and analyze data to correct, improve, and optimize performance of the SNS NCL.
  • Lead or participate in conditioning and RF processing of NCL RF structures, and update/develop conditioning procedures for NCL RF structures.
  • Develop and ensure availability of procedures, drawings, and other required documentation.
  • Participate in maintaining 24/7 operation of the SNS Linac systems, requiring flexibility in working hours to overcome unforeseen events.
  • Represent and present the group’s activity to the Division, Directorate, and various review committees.
  • Direct, supervise, educate, and mentor personnel in their work pertaining to the Linac and related systems.
  • Participate in scientific conferences, workshops, meetings and publish results in the form of SNS technical notes and memos, workshop and conference proceedings, and scientific journals.
  • Maintain a strong commitment to the implementation and perpetuation of laboratory values and ethics.
  • Ensure and monitor compliance with environment, safety, health, and quality program requirements.  Promptly identify ESH and QA issues and communicate them to project and division management, ESH and QA contacts, and/or subcontractor contacts as appropriate.
  • As a member of the ORNL scientific community, you will be expected to commit to ORNL's Research Code of Conduct.  Our full code of conduct, and a statement by the Lab Director's office can be found here:


Basic Qualifications:

  • A PhD in RF engineering, engineering physics or related field with a minimum of 2 years of relevant experience.
  • An equivalent combination of education and experience may be considered (MS in relevant field and at least 7 years of experience or BS in relevant field with at least 8 years of experience).
  • Technical experience in design, construction and/or operation of RF systems.
  • Experience with experimental equipment and instruments.
  • Established knowledge and experience with Linac RF systems.


Preferred Qualifications:

  • Familiarity with the operation of particle accelerator or similar complex system.
  • Combination of experimental, theoretical, and computing skills.
  • Experience in the design, construction and/or operation of normal conducting RF accelerating structures.
  • 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.


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.

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