About

Oak Nelson

I'm an Associate Research Scientist at Columbia University working on plasma-informed engineering of fusion power plants. I grew up in Colorado, studied engineering physics at CU Boulder, earned my Ph.D. in plasma physics at Princeton, and use he/him pronouns.

Photo of Oak Nelson
a.o.nelson@columbia.edu
01
Profile

Research profile

My work focuses on the design and optimization of fusion power plants under physics uncertainty: risk-informed, data-driven, multi-objective design of complete tokamaks and their subsystems (plasma shape, magnets, power exhaust), and the integration of plasma-physics constraints with thermal, structural, and cost limits through AI-enabled surrogate modeling. All of it is grounded in experimental magnetic confinement fusion research. Read more on the Research page, or download my CV (PDF).

02
Career

Appointments and education

  • 2022–presentAssociate Research Scientist, Columbia University. Principal investigator on DOE Fusion Energy Sciences and private-industry fusion awards.
  • 2021–2022Postdoctoral Research Fellow, Columbia University. Negative triangularity scenarios for tokamaks and fusion outreach.
  • 2016–2021Ph.D., Plasma Physics, Princeton University. Thesis: Comprehensive Dynamic Analysis of the H-mode Pedestal in DIII-D. (M.A. 2018)
  • 2012–2016B.S., Engineering Physics, University of Colorado Boulder. Minors in Applied Mathematics and Leadership Studies.
03
Funding

Research funding

Active

RoleProjectSponsorYearsAmount
PINext Step Pulse DesignNext Step Fusion2026–2027$0.174M
Institutional PIAccelerating the Realization of Fusion Energy Through Integrated Physics and Advanced Data ScienceDOE FES, Tokamak Research2025–2029$0.765M
Co-PIAdvancing Intrinsically No-ELM and Small-ELM Regimes for Fusion Pilot PlantsDOE FES, Tokamak Research2025–2029$0.8M
Co-PIClosing Physics and Technology Gaps in Spherical Tokamaks Towards a Compact Fusion Pilot PlantDOE FES, Compact Toroidal Concepts2025–2029$1.421M

Completed

RoleProjectSponsorYearsAmount
PIELM-free Pedestal ModelingTokamak Energy2025$0.08M
PIResearch on Negative Triangularity TokamakNext Step Fusion2024–2025$0.165M

Pending

RoleProjectSponsorYearsAmount
PIInteractive Simulations for Plasma Physics EducationNSF IUSE (under review)2026–2029$0.4M requested
04
Awards

Selected awards

  • 2026John Dawson Award for Excellence in Plasma Physics Research, American Physical Society (shared with the DIII-D negative triangularity team; more)
  • 2018US Burning Plasma Association International ITER School Scholar
  • 2016CU Boulder Outstanding Graduate, College of Engineering and Applied Science
  • 2016CU Boulder Engineering Physics Distinguished Graduate
  • 2016CU Boulder Engineering Physics Distinguished Graduate for Research
  • 2016Hertz Foundation Scholarship Finalist
  • 2015Astronaut Scholarship Foundation Scholar
05
Colorado

Colorado roots

I grew up in Colorado and got my start in research as an undergraduate at CU Boulder, building an experiment to study hypervelocity micrometeoroid bombardment of cryogenic surfaces [RSI 2016] and on terahertz metrology at NIST Boulder [SPIE 2014]. I still come back often:

I am working to build connections with the National Laboratory of the Rockies, Denver-area fusion companies, and the Colorado School of Mines toward a strong fusion ecosystem in Colorado.

06
Tools

Technical skills

Design optimization and integrated modeling: FUSE, TokaMaker, TokSyS, TRANSP, TGYRO. Data-driven methods: machine-learning surrogates, Bayesian and multi-objective optimization, uncertainty quantification, Gaussian process regression. Edge and exhaust: UEDGE, autoUEDGE, CAKE. Equilibrium and stability: EFIT, CHEASE, HELENA, BALOO. Computing: Python, high-performance computing (NERSC). See also Software & Tools.