DIII-D National Fusion Facility
DIII-D National Fusion Facility is a DOE Office of Science user facility operated by General Atomics in San Diego, hosting the largest operating tokamak in North America. It provides open-access experimental runtime, 100+ diagnostics, and heating systems to 700 researchers from 100+ institutions and private fusion companies, advancing magnetic confinement fusion science.
- Company typePrivate
- Founded1986
- HeadquartersSan Diego, United States
- Headcount501–1,000
- GTM typeB2B
- OfferingServices
What DIII-D National Fusion Facility does
DIII-D National Fusion Facility is a U.S. Department of Energy (DOE) Office of Science User Facility operated by General Atomics in San Diego, California, hosting the largest operating tokamak in North America. Since 1986 the facility has served over 100 domestic and international institutions and approximately 700 participating researchers from national laboratories, universities, and industry. Operated as a government-owned, contractor-operated (GOCO) entity, DIII-D operates as an open-access research platform with federally funded base operations and proprietary access available on a full-cost-recovery basis.
The core technical asset is the DIII-D tokamak — a high-flexibility magnetic confinement device with major radius 1.7 m, minor radius 0.6 m, plasma current up to 2 MA, and toroidal field up to 2.17 T — augmented by over 180 access ports, over 100 diagnostic systems, and a heating suite comprising neutral beam injection, electron cyclotron heating, helicon, and lower hybrid current drive systems (with 25 MW NBI and 7 MW ECH upgrades planned). Specialized subsystems include the Shape and Volume Rise (SVR) divertor (installed FY2024), the Small Angle Slot (SAS) divertor, the Divertor Material Evaluation System (DiMES), and an integrated Plasma Control System. Through August 2024 the facility completed its 200,000th plasma shot and generated approximately 500 TB of research data.
DIII-D's business model rests on DOE Fusion Energy Sciences (FES) appropriations funding base operations, with non-proprietary researchers receiving facility resources free of charge and proprietary users paying full cost recovery. Go-to-market is sales-led through institutional User Agreements, complemented by annual Industry Day events (2025, 2026), the Research Opportunity Forum (ROF), student internship programs (CCI/SULI), and significant scientific conference presence (APS-DPP, IAEA FEC, SC). DIII-D generates monetizable indirect value through private-industry validations (e.g., Nvidia Digital Twin, Firefly Fusion NT research, C42X surrogate models) and the training pipeline for the U.S. fusion workforce.
DIII-D National Fusion Facility firmographics
Firmographics- Name
- DIII-D National Fusion Facility
- Legal name
- DIII-D National Fusion Facility
- Website
- https://d3dfusion.org
- Company type
- Private
- Founded year
- 1986
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- DIII-D National Fusion Facility is a DOE Office of Science user facility operated by General Atomics in San Diego, hosting the largest operating tokamak in North America. It provides open-access experimental runtime, 100+ diagnostics, and heating systems to 700 researchers from 100+ institutions and private fusion companies, advancing magnetic confinement fusion science.
- Ownership category
- akta.pro rank
DIII-D National Fusion Facility industry classification
Industry- Product category
- Fusion Energy Research Services
- NAICS
- Irradiation Apparatus Manufacturing (334517)
- akta.pro primary industry
- Reactor Monitoring, Diagnostics & Predictive Maintenance (Sensors, Digital Twin, PHM) (EUAKADAM)
- akta.pro secondary industry
- Instrumentation & Control (I&C) Integration & Commissioning Support (EUAKAAAH)
Keywords
Where DIII-D National Fusion Facility is headquartered
LocationHeadquarters
- HQ city
- San Diego
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
DIII-D National Fusion Facility business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Infrastructure
Revenue model
- DOE Office of Science User Facility Funding: DIII-D is operated by General Atomics for the U.S. Department of Energy, Office of Science, through the Fusion Energy Sciences program. As a federally-funded user facility, base operations are supported by DOE appropriations. Non-proprietary research users receive facility resources free-of-charge. Proprietary research users pay cost recovery for consumed resources.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Non-Proprietary Research User Agreement |
| Other | Multi-year contract | Proprietary Research User Agreement |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels14 records
DIII-D National Fusion Facility product offering
Product offeringCore offering
DIII-D National Fusion Facility operates the largest operating tokamak in North America, providing open-access experimental runtime, over 100 diagnostic systems, and specialized heating/current drive capabilities to the global fusion research community. Operated by General Atomics for the U.S. Department of Energy Office of Science, the facility enables fusion plasma experiments, plasma-material interaction testing, AI/ML plasma control development, and workforce training across approximately 700 researchers from 100+ institutions.
Product overview
The DIII-D National Fusion Facility operates the largest tokamak in North America as a DOE Office of Science User Facility, providing open access to the global fusion research community. The facility combines the DIII-D Tokamak with over 100 diagnostic systems, multiple heating and current drive systems (neutral beam, ECH, helicon, LHCD), and specialized components including the DiMES material testing system, SAS divertor, and newly installed SVR divertor. Research support services include user facility access, student internship programs (CCI/SULI), annual Industry Day events, and comprehensive research product dissemination. The program serves approximately 100 institutions and 700 researchers, with growing integration of AI/ML capabilities for plasma control and disruption prediction.
Differentiator
Problem solved
Functional benefit
Products and services
- DIII-D Tokamak The largest operating tokamak in North America with major radius 1.7m, minor radius 0.6m, plasma current up to 2MA, and toroidal field up to 2.17T. Operated by General Atomics for the DOE Office of Science, it offers high operational flexibility for fusion plasma experiments and is accessible to the global research community.
- DIII-D User Facility Access Program DOE Office of Science User Facility program providing open-access experimental runtime on the DIII-D tokamak. Available through Non-Proprietary Research User Agreements (free facility resources, all research data shared with DIII-D team) or Proprietary Research User Agreements (full cost recovery, custom per project). Access is open to all interested researchers from the global fusion community.
- Student Internship Programs DOE-sponsored paid internship programs including the Community College Internship (CCI) and Science Undergraduate Laboratory Internship (SULI). Programs run for 10 or 16 weeks during spring, fall, or summer terms, providing hands-on fusion research experience at the DIII-D facility.
Quantifiable outcome
- Completed 200,000th plasma shot in August 2024 — a historic operational milestone
- +5 more outcomes
Companies that use DIII-D National Fusion Facility
Customer profileNamed customers23 records
Segments4 records
Ideal customer profiles3 records
DIII-D National Fusion Facility technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration5 records
AI capability7 records
Feature7 records
DIII-D National Fusion Facility partnerships and signals
Strategic signalPartnerships
14 partnerships are on record, tiered flagship, core, major and minor.
- U.S. Department of Energy, Office of ScienceflagshipDIII-D is a DOE Office of Science User Facility operated by General Atomics for the Fusion Energy Sciences (FES) program. DOE provides primary funding, program oversight, and policy framework governing open-access research operations.
- General AtomicscoreGeneral Atomics (GA) serves as the host for the DIII-D program, overseeing facility performance, setting engineering requirements, managing personnel safety, operating the facility for experiments, and providing research staff. GA is the prime contractor operating DIII-D for DOE.
- NvidiamajorNvidia collaborated with DIII-D on Digital Twin development for accelerating fusion science. The collaboration integrates GPU-based high-performance computing and AI into DIII-D experimental workflows, enabling on-demand analysis of plasma shots.
- Oak Ridge National Laboratory (ORNL)majorORNL is a major research partner contributing to DIII-D diagnostic systems (Visible Bremsstrahlung arrays, fast bolometers, visible spectrometers), pellet injectors, and multiple experiments. Also supports Nusenics fiber-optic bolometer testing through a DOE collaboration.
- MIT Plasma Science and Fusion CentermajorMIT PSFC is a key partner developing and deploying major hardware enhancements (HFS-LHCD system), operating Phase Contrast Imaging diagnostic, and conducting research in heating/current drive, disruption science, pedestal physics, and core transport.
- Princeton Plasma Physics Laboratory (PPPL)majorPPPL contributes to DIII-D through Main Ion CER (MiCER) diagnostic development, impurity injection systems (powder dropper, granule injector), pedestal research with LLAMA diagnostic, and disruption/runaway electron studies.
- National Energy Technology Laboratory (NETL) / NERSC / ALCF / ESnetmajorDOE supercomputing facilities (NERSC, ALCF) and ESnet high-speed data network integrated with DIII-D experiments. Live demonstration at SC24 showed real-time data exchange between DIII-D tokamak and supercomputers for on-demand plasma shot analysis and experimental decision-making.
- EAST (Experimental Advanced Superconducting Tokamak)majorDIII-D/EAST Joint Task Force conducts collaborative experiments integrating high-performance high-poloidal-beta core and full divertor detachment in ITER-like plasma shapes, leveraging complementary capabilities of both tokamaks.
- ITER OrganizationflagshipDIII-D conducts priority experiments identified by the ITER organization to guide early start-up phases of ITER, including disruption-free error field identification experiments performed in coordination with JET and ASDEX-Upgrade.
- KSTAR (Korean Superconducting Tokamak Advanced Research)majorCollaborative KSTAR/DIII-D upgrade involving adaptive resonant magnetic perturbation (RMP) achieving ELM suppression at reduced perturbation coil current, allowing recovery of high core performance.
- UK Atomic Energy Authority (UKAEA)minordigiLab collaborates with UKAEA on surrogate models of plasma turbulence and uncertainty characterization of control systems. digiLab's focus at DIII-D is on ML tools for plasma control and simulations.
- Thea EnergyminorPrinceton spin-out collaborating with UCSD at DIII-D to evaluate renewable low-Z plasma-facing concepts using boron pebble injection via DiMES for first-wall design validation of planar coil stellarator.
- Sandia National Laboratory (SNL)majorSNL contributes to DIII-D through fixed Langmuir probes, fast thermocouple arrays, fusion material testing with DiMES, and large-scale sample exposure campaigns during tungsten tile testing.
- Lawrence Livermore National Laboratory (LLNL)majorLLNL contributes to DIII-D diagnostics including VUV survey spectrometer, coherent imaging spectroscopy, MSE polarimetry, soft X-ray imaging, and Wide Spectral Emission spectroscopy. Also contributes to DiMES TV operations and tangential plasma TV imaging.
Scale indicators7 records
Recent moves7 records
Expansion highlights6 records
DIII-D National Fusion Facility competitors and assessment
Company assessmentDirect peers
- ITER: International tokamak under construction in France by the ITER Organization (US/EU/Russia/China/Japan/Korea/India). The largest magnetic fusion device ever attempted (~10x DIII-D plasma volume) and DIII-D's flagship international collaborator. DIII-D conducts priority experiments prioritized by the ITER Organization.
- Joint European Torus (JET): Europe's flagship tokamak operated by UKAEA at Culham, UK. Set the world record for fusion energy produced (69 MJ in 2022). Direct peer in mission, scale, and user-facility model; DIII-D coordinates disruption-mitigation and error-field experiments with JET.
- ASDEX-Upgrade: German tokamak at Max Planck IPP, Garching. Direct peer focused on tungsten wall, ITER-like scenarios, and divertor physics. Collaborates with DIII-D on error-field experiments alongside JET and coordinates global scenario development.
- EAST (Experimental Advanced Superconducting Tokamak): Chinese superconducting tokamak at the Institute of Plasma Physics, Hefei. Joint DIII-D/EAST Task Force integrates high-performance core scenarios with full divertor detachment in ITER-like shapes. Direct peer with overlapping research scope.
- KSTAR (Korea Superconducting Tokamak Advanced Research): Korean superconducting tokamak at KFE, Daejeon. Active KSTAR/DIII-D collaboration on adaptive RMP ELM suppression at reduced coil current. Comparable mission in advanced scenario development and long-pulse operation.
- WEST (Tungsten Environment in Steady-state Tokamak): French CEA tokamak at Cadarache focused on ITER-like tungsten walls and long-pulse operation. Comparable mission in plasma-facing-component research and ITER scenario validation.
- MAST-Upgrade: UKAEA spherical tokamak at Culham with Super-X divertor configuration for exhaust physics. Comparable as a mid-scale national user facility; complementary to DIII-D on divertor and plasma-material interaction research.
Broad incumbents
- Princeton Plasma Physics Laboratory (PPPL): U.S. DOE national lab dedicated to plasma physics and fusion energy research. Operates the NSTX-U spherical tokamak and contributes heavily to DIII-D (MiCER diagnostics, LLAMA, disruption science). Broader incumbent in U.S. fusion ecosystem with overlapping mission.
- National Ignition Facility (NIF): U.S. inertial confinement fusion facility at LLNL that achieved fusion ignition in December 2022. Operates as a user facility for inertial confinement rather than magnetic confinement, but comparable in mission, scale, DOE funding model, and role as a national fusion research asset.
Emerging players
- Commonwealth Fusion Systems (SPARC): Private fusion company building SPARC, a high-field compact tokamak using HTS magnets, targeting Q>1 in the mid-2020s. Emerging private-sector complement to DIII-D; some CFS personnel trained on DIII-D and DIII-D physics informs SPARC scenarios.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat6 records
Key risks7 records
Key highlights7 records
Customer concentration
DIII-D National Fusion Facility social profiles
Digital presenceDIII-D National Fusion Facility compliance and trust
Trust signalCompliance1 record
DIII-D National Fusion Facility financial estimates
Financial estimateRevenue estimate
Valuation estimate
DIII-D National Fusion Facility leadership team
Management profileNumber of profiles
Profiles1 record
DIII-D National Fusion Facility funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
DIII-D National Fusion Facility M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about DIII-D National Fusion Facility
What does DIII-D National Fusion Facility do?
DIII-D National Fusion Facility operates the largest operating tokamak in North America, providing open-access experimental runtime, over 100 diagnostic systems, and specialized heating/current drive capabilities to the global fusion research community. Operated by General Atomics for the U.S. Department of Energy Office of Science, the facility enables fusion plasma experiments, plasma-material interaction testing, AI/ML plasma control development, and workforce training across approximately 700 researchers from 100+ institutions.
Is DIII-D National Fusion Facility a public or private company?
DIII-D National Fusion Facility is a private company. It is classified as state government owned and is currently operating.
When was DIII-D National Fusion Facility founded?
DIII-D National Fusion Facility was founded in 1986. It employs 501 to 1,000 people.
Where is DIII-D National Fusion Facility based?
DIII-D National Fusion Facility is headquartered in San Diego, United States, in the North America region.
How does DIII-D National Fusion Facility make money?
One revenue line is on record: DOE Office of Science User Facility Funding.
Who are DIII-D National Fusion Facility's main competitors?
Direct peers on record are ITER, Joint European Torus (JET), ASDEX-Upgrade, EAST (Experimental Advanced Superconducting Tokamak), KSTAR (Korea Superconducting Tokamak Advanced Research), WEST (Tungsten Environment in Steady-state Tokamak) and MAST-Upgrade. Broad incumbents are Princeton Plasma Physics Laboratory (PPPL) and National Ignition Facility (NIF). Commonwealth Fusion Systems (SPARC) is listed as an emerging player.
Does DIII-D National Fusion Facility have an API?
No public API is recorded for DIII-D National Fusion Facility.
What industry is DIII-D National Fusion Facility in?
DIII-D National Fusion Facility's product category is Fusion Energy Research Services. Its primary akta.pro industry code is EUAKADAM, Reactor Monitoring, Diagnostics & Predictive Maintenance (Sensors, Digital Twin, PHM), with a secondary code of EUAKAAAH, Instrumentation & Control (I&C) Integration & Commissioning Support. Its NAICS code is 334517.