Computational Beam Physicist: Simulations & Validation

Realta Fusion; Madison (WI); On-site; USD 110,000 - 170,000; Full time

Benefits offered by this job

Equity stock options

Health, dental, and vision insurance

Retirement savings plan

Flexible PTO

Live in Madison

Job summary

Realta Fusion in Madison, WI seeks an NBI Scientist (Computational Beam Physicist) to lead the scientific-code stack connecting fast beam models, high-fidelity simulations, and experimental validation.

You will develop and integrate computational tools used to model beam behavior, evaluate system performance, and compare simulation results with experimental data, translating modeling results into actionable insights for beam-system design and planning.

Qualifications

• PhD or equivalent in Computer Science, Applied Mathematics, Plasma Physics, or related field.
• Strong foundation in physics, scientific Python, and numerical methods; experience with C++, HPC, and GPU computing.
• Experience developing and maintaining scientific software with version control, testing, documentation, and reproducible workflows.
• Ability to develop parameter scans, uncertainty studies, optimization methods, and surrogate-model workflows.
• Experience with large-scale simulations and computational modeling of complex systems.

Responsibilities

• Take primary responsibility for RealBeam architecture, implementation quality, and verification.
• Connect RealBeam and WarpX workflows across WHAM and Narsil for consistent inputs/outputs.
• Develop and maintain a validated modeling pipeline linking simulations with experimental results.
• Develop, test, and improve scientific software and numerical tools for beam modeling and analysis.
• Perform computational studies and parameter scans to evaluate beam behavior and design alternatives.
• Collaborate with scientists and engineers to translate results into actionable recommendations.
• Partner with NBI team members to provide software and computational expertise.

Skills

Physics foundation

Scientific Python

Numerical methods

C++

HPC

GPU computing

Software development

Version control

Testing & verification

Documentation

Reproducible workflows

Education

PhD or equivalent

Tools

WarpX workflows

PIC simulations

Monte Carlo

beamline codes

Job description

Realta Fusion in Madison, WI seeks an NBI Scientist (Computational Beam Physicist) to lead the scientific-code stack connecting fast beam models, high-fidelity simulations, and experimental validation.

You will develop and integrate computational tools used to model beam behavior, evaluate system performance, and compare simulation results with experimental data, translating modeling results into actionable insights for beam-system design and planning.