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The race to repeatable fusion ignition
New CapabilitiesHow repeatable ignition spawned a global race between national-lab spinouts, China's tokamaks, and private companies that have now raised over $10 billion
July 10th, 2026: General Fusion Lists on Nasdaq as GFUZNew here? Follow stories to track developments over time. Create a free account to get updates when stories you care about change.
Overview
NIF achieved ignition for the 11th time on June 20, 2026, producing 7.9 megajoules from 2.08 megajoules of laser energy. The Department of Energy approved a laser upgrade in April that will push NIF's peak power from 2.2 to 2.6 megajoules, which would allow the 8.6-megajoule yield record to be broken.
Annie Kritcher, who designed NIF's first ignition experiments, co-founded Inertia Enterprises while staying at LLNL, raising $450 million in February 2026 to build the same laser approach at commercial scale. Commonwealth Fusion Systems' SPARC tokamak hit 75% completion in May, and General Fusion became the world's first publicly traded fusion company in July. Global private investment in fusion has crossed $10 billion.
Why it matters
Fusion at commercial scale would deliver carbon-free power without the waste or meltdown risk of conventional nuclear reactors.
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Key Indicators
8.6 MJ
Record fusion yield (April 2025)
Highest energy output from NIF, 4.1x gain over laser input
2.4 MJ
THOR windowed design yield
First ignition achieved with diagnostic windows built into target
$10B+
Global private fusion investment
Private capital raised by 40+ fusion companies worldwide, crossing $10 billion in 2026 with major new rounds from Inertia, Focused Energy, and Pacific Fusion
65%
Beyond Greenwald limit
China's EAST tokamak broke 70-year density barrier in January 2026
11
NIF ignitions completed
11th ignition achieved June 20, 2026, with 7.9 MJ yield and 3.8x target gain
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The race to repeatable fusion ignition
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People Involved
Annie Kritcher
Co-founded Inertia Enterprises in 2024 while continuing national security research at LLNL under a federal Outside Business Agreement; Inertia raised $450M in February 2026
Brian Haines
Lead designer for THOR windowed ignition experiment
Omar Hurricane
Oversees NIF fusion research strategy since 2014
Kim Budil
First woman to lead LLNL, overseeing ignition achievements
John Despotopulos
Leading team making first experimental measurements of nuclear reactions in stellar plasma
Jeff Lawson
Co-founded Inertia Enterprises in 2024 to commercialize NIF laser fusion; company raised $450M in February 2026
Mike Dunne
Co-founded Inertia Enterprises; leading technical development of Thunderwall commercial laser
Organizations Involved
National Ignition Facility
National Laboratory Laser Facility
Achieved 11th ignition in June 2026 (7.9 MJ); laser upgrade approved to push peak energy from 2.2 to 2.6 MJ
The $3.5 billion facility fires 192 lasers at hydrogen fuel capsules to create conditions found in stars and nuclear weapons.
Lawrence Livermore National Laboratory
U.S. Department of Energy National Laboratory
Leading U.S. fusion ignition research and weapons stewardship
One of two U.S. labs responsible for nuclear weapons design and the science-based stockpile stewardship program.
Los Alamos National Laboratory
U.S. Department of Energy National Laboratory
Achieved first windowed ignition design with THOR platform
Birthplace of the atomic bomb, now advancing fusion diagnostics and weapons science through novel target designs.
Commonwealth Fusion Systems
Private Fusion Energy Company
SPARC tokamak at 75% completion as of May 2026; first plasma targeted for late 2026, net energy gain demonstration in 2027
MIT spinout developing high-temperature superconducting tokamak reactors, raised $2.9B in funding.
Experimental Advanced Superconducting Tokamak (EAST)
Chinese National Fusion Research Facility
Broke Greenwald density limit barrier in January 2026, sustained 1066-second plasma
China's fully superconducting tokamak, nicknamed 'artificial sun,' achieving breakthrough plasma densities and durations.
TE
TAE Technologies
Private Fusion Energy Company
Trump Media merger target pushed to Q4 2026; Devin Nunes and Michl Binderbauer to serve as co-CEOs of combined company
California-based fusion company developing aneutronic fusion approach, raised $1.5B in funding.
General Fusion
Private Fusion Energy Company
Became world's first publicly traded pure-play fusion company in July 2026 (Nasdaq: GFUZ) following SPAC merger with Spring Valley Acquisition Corp. III
Canadian fusion company developing magnetized target fusion approach, raised $392M in funding.
Inertia Enterprises
Private Fusion Energy Company
Raised $450M Series A in February 2026 to build Thunderwall laser and commercial fusion plant targeting 2030 construction start
NIF spinout co-founded by fusion designer Annie Kritcher, building commercial laser fusion based on inertial confinement physics proven at LLNL.
Focused Energy
Private Fusion Energy Company
Raised $240M Series A in June 2026—largest in global fusion industry history—to build commercial plant at former RWE nuclear site in Biblis, Germany
German fusion startup developing laser-driven inertial confinement fusion, spun out of Technical University of Darmstadt in 2021.
PF
Pacific Fusion
Private Fusion Energy Company
Sirius pulsed-power prototype hit 3,000-shot milestone at LLNL in July 2026; breaking ground on demonstration system in Albuquerque targeting net gain by 2030
Pulsed-power fusion startup developing impedance-matched Marx generator technology, raised over $1 billion, distinct from both laser and tokamak approaches.
Timeline
May 2009 July 2026
28 events
Latest: July 10th, 2026 · 1 month ago
Showing 8 of 28
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General Fusion Lists on Nasdaq as GFUZ
Latest BusinessGeneral Fusion completes its merger with Spring Valley Acquisition Corp. III and begins trading on Nasdaq under the ticker GFUZ, becoming the world's first publicly traded pure-play fusion company.
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NIF Achieves 11th Ignition at 7.9 MJ
ProgressNIF fires its 11th successful ignition shot, producing 7.9 megajoules from 2.08 megajoules of laser input—a target gain of approximately 3.8—extending the streak of repeatable ignition that began in December 2022.
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SEC Clears General Fusion's SPAC Registration
BusinessThe SEC declares General Fusion's joint F-4 registration statement effective, clearing the path for a July 6 shareholder vote and merger close with Spring Valley Acquisition Corp. III on or about July 10.
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TAE-Trump Media Merger Pushed to Q4 2026
BusinessTrump Media and TAE Technologies issue a joint update pushing the expected merger close from mid-2026 to Q4 2026 or sooner. Devin Nunes and TAE CEO Michl Binderbauer will serve as co-CEOs of the combined company.
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Focused Energy Raises $240M for German Laser Fusion Plant
FundingGermany's Focused Energy closes the largest Series A in global fusion history, raising $240 million to build a laser fusion plant at the former RWE nuclear site in Biblis, Germany. Total funding reaches $300 million in equity plus $200 million in grants.
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SPARC Tokamak Reaches 75% Completion
ProgressCommonwealth Fusion Systems lowers the second half of SPARC's 48-ton vacuum vessel into place in Devens, Massachusetts, bringing the demonstration reactor to 75% completion with first plasma targeted for late 2026.
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DOE Approves NIF Laser Upgrade to Push Peak Energy to 2.6 MJ
PolicyDOE and NNSA advance the Enhanced Fusion Yield Capability project past Critical Decision-1, approving $26 million to develop a laser upgrade that raises NIF's peak recurring energy from 2.2 to 2.6 megajoules.
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Inertia Enterprises Raises $450M to Commercialize NIF Physics
FundingInertia Enterprises, co-founded by NIF physicist Annie Kritcher, raises $450 million in a Series A led by Bessemer Venture Partners and GV (Google Ventures) to build Thunderwall—a commercial laser fusion system—and a fuel target production line at scale.
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General Fusion to Become First Public Fusion Company
BusinessGeneral Fusion announces merger with Spring Valley Acquisition Corp. III to become world's first publicly traded pure-play fusion company.
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China Hosts Fusion Energy Technology Conference
PolicyFusion Energy Technology and Industry Conference 2026 held in Hefei to build collaborative innovation ecosystem for nuclear fusion energy.
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Commonwealth Fusion Systems Installs First SPARC Magnet
ProgressCFS installs first of 18 magnets for SPARC demonstration reactor, announces partnership with Nvidia for digital twin development. Expects all magnets installed by summer 2026.
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China's EAST Breaks Greenwald Density Limit
BreakthroughEAST tokamak achieves plasma densities 65% beyond Greenwald limit, overcoming 70-year barrier. At 150-million-degree temperatures, breakthrough could quadruple energy output.
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NIF Enables First Stellar Nuclear Reaction Measurements
ResearchLLNL radiochemistry team makes first experimental measurements of nuclear reactions in high-energy-density plasma environments similar to conditions in stars and thermonuclear explosions.
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TAE Technologies Announces $6B Trump Media Merger
BusinessTrump Media & Technology Group agrees to merge with TAE Technologies in all-stock deal valuing combined company at over $6 billion. TAE plans to begin building 50 MWe utility-scale plant in 2026.
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DOE Releases Fusion Roadmap
PolicyDepartment of Energy announces strategy targeting commercial fusion power by mid-2030s.
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Commonwealth Fusion Secures $1B+ Power Deal
BusinessItalian energy giant Eni signs landmark $1 billion+ Power Purchase Agreement to buy power from CFS's future ARC commercial plant.
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DOE Awards $134M for Fusion Research
FundingEnergy Department announces $134 million for FIRE collaboratives and INFUSE program to accelerate private-sector fusion development.
-
Los Alamos Achieves Windowed Ignition
BreakthroughLANL's THOR design with diagnostic windows achieves 2.4 MJ ignition, proving robustness.
-
Record 8.6 MJ Yield Sets New Bar
RecordNIF achieves 8.6 MJ output from 2.08 MJ laser drive, yielding 4.1x gain.
-
Seventh Ignition Sets New Target Gain Record
RecordNIF achieves ignition for seventh time with 2.05 MJ shot yielding 5.0 MJ, setting target gain record of 2.44.
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China's EAST Sets Plasma Duration Record
RecordEAST sustains plasma for 1066 seconds (nearly 18 minutes), breaking previous record and demonstrating sustained tokamak operation.
-
Yield Doubles Input Energy
ProgressExperiment produces 5.2 MJ from 2.2 MJ laser energy, more than doubling input.
-
Second Ignition Exceeds First
ProgressNIF achieves 3.88 MJ from 2.05 MJ input, confirming ignition is repeatable.
-
Public Announcement of Ignition
AnnouncementEnergy Secretary Jennifer Granholm announces historic achievement to the world.
-
First Fusion Ignition in Laboratory History
BreakthroughNIF produces 3.15 MJ from 2.05 MJ laser input, achieving scientific breakeven for first time.
-
Major Breakthrough Shot
ProgressNIF achieves 1.3 MJ yield, 70% of laser input energy, 25 times previous record.
-
Ignition Campaign Falls Short
SetbackInitial campaign ends at 1/10 of conditions needed for ignition after two years of attempts.
-
NIF Becomes Operational
FacilityNational Ignition Facility fires all 192 laser beams for first time, delivering 1.098 megajoules.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
1997-2024
JET Tokamak Sets Fusion Record (1997-2024)
The Joint European Torus in the UK achieved 16 MW of fusion power in 1997, a record that stood for 25 years. JET used magnetic confinement in a doughnut-shaped tokamak, sustaining fusion reactions for seconds rather than NIF's nanosecond pulses. In its final experiments before decommissioning in 2024, JET produced 69.26 megajoules over six seconds from 0.21 milligrams of fuel.
Then
Demonstrated sustained fusion reactions were possible, validating tokamak approach for ITER.
Now
Proved magnetic confinement could achieve significant fusion yields, though still below breakeven.
Why this matters now
JET's sustained burns contrast with NIF's instantaneous ignition, showing fusion has multiple viable paths with different trade-offs.
1943-1952
Manhattan Project and National Labs (1943-1945)
The U.S. established Los Alamos in 1943 to develop atomic weapons, achieving the first nuclear detonation in July 1945. After World War II ended, weapons laboratories pivoted to peacetime missions. Lawrence Livermore was founded in 1952 as a second nuclear design lab. Both facilities transitioned from building bombs to maintaining the arsenal without testing.
Then
Created institutional infrastructure for nuclear weapons development that won World War II.
Now
National labs became centers for extreme physics research, eventually hosting fusion experiments like NIF.
Why this matters now
Today's fusion breakthroughs happen at labs built for weapons, using facilities designed to study nuclear detonations without testing.
1973-2012
U.S. Solar Industry Rise and Fall (1970s-2000s)
America led solar photovoltaic development through the 1970s oil shocks, with government funding and Bell Labs innovations. By the 1990s, U.S. companies dominated manufacturing. Then China entered with massive subsidies, scaling production beyond U.S. capacity. By 2012, Chinese firms produced solar panels at costs American manufacturers couldn't match, driving most U.S. companies bankrupt.
Then
U.S. lost manufacturing dominance but retained technology leadership through research.
Now
China controls 80% of global solar manufacturing; U.S. became dependent on Chinese imports for renewable energy.
Why this matters now
Fusion risks the same trajectory—U.S. achieves scientific breakthrough but loses commercial race to countries that invest in scaling.
Sources
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