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Commonwealth Fusion Systems
@cfs.energy
We’re on a mission to deliver clean fusion energy to the planet fast enough to matter for humanity’s biggest challenges.⚡️🔆💫
3/3 Success in milestone 3 means scoring high on a measurement called the triple product that reflects your plasma’s density, temperature, and insulation. Many fusion machines have faltered trying to get there.

For details, check Bob's blog post: blog.cfs.energy/fusion-energ...

#FusionEnergy
Fusion energy’s third step: Taming a superheated plasma | The Tokamak Times
For milestone 3, of the six-step path to fusion energy, you’ve got to crank up your machine so its plasma is hot enough, dense enough, and well enough insulated at the same time.
blog.cfs.energy
November 14, 2025 at 9:54 PM
2/3 Milestone 3 means building a fusion machine that approaches conditions intense enough for fusion to take place. It’s a lot harder to reach than the first two milestones. Not only must the plasma be hot, but it must stay hot on its own.
November 14, 2025 at 9:54 PM
Many of our publications are here:
cfs.energy/technology/p...
Publications
The world's largest and leading commercial fusion energy company
cfs.energy
November 13, 2025 at 4:35 PM
6/6 Fusion energy is within our reach. If the US government moves now, the whole country can benefit from this clean, affordable new energy source.
November 12, 2025 at 9:12 PM
5/6 💡 And $3 billion for a new demonstration phase of the Milestone program for competitively awarded, cost-sharing funds that support two to three commercial demonstration fusion power plants.
November 12, 2025 at 9:12 PM
4/6 💡 $2.4 billion to fully fund DOE’s existing Milestone program to support companies efforts to complete their engineering designs of their commercial power plants;
November 12, 2025 at 9:12 PM
3/6 💡 $4 billion to support critical enabling research and infrastructure at DOE National Laboratories, universities, and companies to close technology gaps.
November 12, 2025 at 9:12 PM
2/6 The result would be a chance to secure the country’s energy future, power economic growth and new industries like AI, and forever change the direction of human development. The FIA is calling on the Trump Administration and Congress to provide:
November 12, 2025 at 9:12 PM
3/3 This week they published a notable update to that paper with new results. Tracking progress is important for us all to better discern between real progress and hype. We hope to see SPARC on here in a future update.

Read the full paper here: pubs.aip.org/aip/pop/arti...
Continuing progress toward fusion energy breakeven and gain as measured against the Lawson criteria
This paper is an update to our earlier paper “Progress toward fusion energy breakeven and gain as measured against the Lawson criterion” [Phys. Plasmas 29, 0621
pubs.aip.org
November 7, 2025 at 8:38 PM
2/3 Sam and Scott are playing an important role in the effort to commercialize fusion energy. Their 2022 paper charting fusion progress provides one of the best records of actual performance, grounding this work with peer-reviewed data.
November 7, 2025 at 8:38 PM
The vacuum vessel is the heart of SPARC where our fusion fuel, heated to about 100 million degrees Celsius, will be contained. Now that half of it is at our headquarters in Devens, our team is already getting to work preparing it for the next phase of the build.

#SPARC #Aviation
November 5, 2025 at 4:43 PM
– Somshankar Bandyopadhyay reports on fusion energy after a conversation with CFS CEO and Co-founder Bob Mumgaard.

Says Mumgaard: “Energy is prosperity, and prosperity is change." 2/2
Fusion energy gains global momentum as CFS secures Dh3.17 billion in funding
CFS is currently building its Sparc facility in Devens, Massachusetts, with supply chain partners from over 30 countries. The project is 70 per cent complete
www.khaleejtimes.com
October 31, 2025 at 9:09 PM
2/2 Its smooth journey from Italy to our headquarters over the course of a few days required a lot of moving parts — multiple teams, different cranes, one big plane, and two big trucks. This inside look shows the planning and execution behind the whole operation.
How we got a 48-ton piece of fusion hardware across the Atlantic
YouTube video by Commonwealth Fusion Systems
www.youtube.com
October 30, 2025 at 3:49 PM
The vacuum vessel is the donut-shaped chamber inside SPARC that'll house our fusion fuel — a superhot cloud of charged particles called a plasma. The delivery of this key component means that our energy plans are literally starting to take shape.

youtu.be/HqfZUsnODiQ?...

#FusionEnergy
48 tons of steel: Half the heart of SPARC fusion machine arrives
YouTube video by Commonwealth Fusion Systems
youtu.be
October 28, 2025 at 2:16 PM
Here's our guide to distinguishing the fusion hype from the actual fusion progress: cfs.energy/news-and-med...

As for AI hype, look at Google DeepMind's track record in actually delivering results. Nobel Prizes are pretty hard to come by.
Building Trust in Fusion Energy
The world's largest and leading commercial fusion energy company
cfs.energy
October 16, 2025 at 3:43 PM