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Senior NBI Scientist (Accelerator Physicist)

Realta Fusion


Job Location:

Madison, OH - USA

Monthly Salary: Not provided by the employer
Posted: 19 September 2026 (2 days ago)
Application Deadline: 18 December 2026
Vacancies: 1 Vacancy

Job Summary

Help design and advance the neutral beam systems at the heart of Realtas fusion technology. The Senior NBI Scientist (Accelerator Physicist) will provide detailed accelerator and beam-physics execution for Narsil and Hammir. The position will support the design development testing and optimization of neutral beam injection systems and work closely with engineering and scientific teams to address beam performance accelerator operation system integration and technical challenges. The Senior NBI Scientist/Accelerator Physicist will analyze experimental results and use data and modeling to guide system improvements and support the successful development and operation of Realtas NBI systems.

Key Responsibilities

  1. Conduct detailed Narsil extraction acceleration and beam-transport physics analysis including modeling and evaluation of ion extraction beam acceleration focusing transport and overall beam performance. Use analysis and experimental results to identify performance limitations and recommend design or operational improvements.
  2. Provide detailed beam-physics analysis and design-trade support for Hammir evaluating accelerator and beam-transport concepts operating parameters and design alternatives. Work with the broader NBI and engineering teams to translate beam-physics requirements into practical system designs.
  3. Develop maintain and improve accelerator and beam-physics modeling tools and supporting code used for system design performance prediction design trades and interpretation of experimental results. Document modeling assumptions methods and results to support ongoing NBI development.
  4. Mentor NBI Scientists in accelerator and ion-optical physics providing technical guidance reviewing analyses and helping develop their capabilities in beam modeling accelerator physics and interpretation of experimental data. Collaborate closely with Manager NBI Science who will retain final system-level technical authority for NBI architecture and technical direction.

Background and Experience

  • PhD or equivalent experience in accelerator physics charged-particle beams plasma/beam extraction or a closely related field.
  • Strong knowledge of beam optics extraction physics perveance emittance/divergence electrostatic acceleration and high-current beam transport.
  • Experience with accelerator grids multi-aperture systems magnetic transport stripping/reionization or neutral beam systems is highly desirable.
  • Ability to independently perform calculations modeling parameter scans and design trades and translate results into clear engineering recommendations.
  • Hands-on experience with beam diagnostics testing or accelerator commissioning is preferred.

Compensation & Benefits

What we are working on is hard and hugely important. Realta Fusion is assembling a talented team bound together by a passion to solve humanitys biggest challenge with first-of-a-kind technology. Additionally Realta offers:

  • Competitive compensation package including equity stock options
  • Comprehensive benefits including health dental and vision insurance plus a 401(k)
  • Flexible paid time off (PTO) to support work-life balance
  • Work and live in Madison Wisconsin one of Americas most livable and vibrant cities

We value diversity as a critical factor in innovation and believe a diverse team is necessary to solve the toughest problems. We aim to create an inclusive environment that unleashes the full creativity of our team members from a wide variety of backgrounds and experiences. We provide equal employment opportunities to all individuals based on merit and without regard to race color religion sex sexual orientation gender identity national origin disability veteran status or any other protected status under applicable laws.



Required Experience:

Senior IC


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