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.⚡️🔆💫
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
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.
Data is good. Publishing it is good. This paper from Sam Wurzel and Scot Hsu is a peer-reviewed scorecard that lets us all track the concrete progress on our commercialization milestones — the solid foundation that builds trust in the fusion energy industry. 1/3
#FusionEnergy
#FusionEnergy
November 7, 2025 at 8:38 PM
Data is good. Publishing it is good. This paper from Sam Wurzel and Scot Hsu is a peer-reviewed scorecard that lets us all track the concrete progress on our commercialization milestones — the solid foundation that builds trust in the fusion energy industry. 1/3
#FusionEnergy
#FusionEnergy
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
#SPARC #Aviation
November 5, 2025 at 4:43 PM
To get the first half of our vacuum vessel from Italy to the USA, we flew it on an Antonov An-124 Ruslan aircraft, an unusual 4-engine cargo plane with room for the 48-ton component. Unlike passenger planes, the nose of the An-124 hinges upward to load and unload cargo.
#FusionEnergy #PlaneSpotting
#FusionEnergy #PlaneSpotting
November 5, 2025 at 4:43 PM
To get the first half of our vacuum vessel from Italy to the USA, we flew it on an Antonov An-124 Ruslan aircraft, an unusual 4-engine cargo plane with room for the 48-ton component. Unlike passenger planes, the nose of the An-124 hinges upward to load and unload cargo.
#FusionEnergy #PlaneSpotting
#FusionEnergy #PlaneSpotting
Big update: Half of our vacuum vessel, the very heart of our SPARC fusion machine, has landed in Devens, Massachusetts.
#PowerMoves
#PowerMoves
October 28, 2025 at 2:16 PM
Big update: Half of our vacuum vessel, the very heart of our SPARC fusion machine, has landed in Devens, Massachusetts.
#PowerMoves
#PowerMoves
The time is ripe for this collaboration, and we’re happy it’s underway. AI and fusion energy are 21st century technologies that’ll power the global economy for generations to come.
For more details, read Google DeepMind's post, too: deepmind.google/discover/blo...
#FusionEnergy #PowerMoves #AI
For more details, read Google DeepMind's post, too: deepmind.google/discover/blo...
#FusionEnergy #PowerMoves #AI
October 16, 2025 at 1:47 PM
The time is ripe for this collaboration, and we’re happy it’s underway. AI and fusion energy are 21st century technologies that’ll power the global economy for generations to come.
For more details, read Google DeepMind's post, too: deepmind.google/discover/blo...
#FusionEnergy #PowerMoves #AI
For more details, read Google DeepMind's post, too: deepmind.google/discover/blo...
#FusionEnergy #PowerMoves #AI
🧵 But with AI, “You can train models so that you can actually ask the model, of seven different designs, which one's the best? You get that answer much faster,” Mumgaard said at SCSP's conference. That could improve fusion power plant development and accelerate progress.
#FusionEnergy #AI
#FusionEnergy #AI
October 15, 2025 at 7:24 PM
🧵 But with AI, “You can train models so that you can actually ask the model, of seven different designs, which one's the best? You get that answer much faster,” Mumgaard said at SCSP's conference. That could improve fusion power plant development and accelerate progress.
#FusionEnergy #AI
#FusionEnergy #AI
At CFS, we believe AI has the potential to break bottlenecks in traditional computing and accelerate fusion energy progress. At Tuesday's Special Competitive Studies Project conference about fusion and AI, our CEO Bob Mumgaard described how fusion could be one of many fields that AI could remake. 🧵
October 15, 2025 at 7:18 PM
At CFS, we believe AI has the potential to break bottlenecks in traditional computing and accelerate fusion energy progress. At Tuesday's Special Competitive Studies Project conference about fusion and AI, our CEO Bob Mumgaard described how fusion could be one of many fields that AI could remake. 🧵
“The central dynamic of the fusion race is clear: the United States laid the scientific groundwork; China is positioning to win the industry…"
So concludes a new report on the race to reap fusion energy's benefits: economic advantages, energy independence, a lead in AI & national security. 🧵
So concludes a new report on the race to reap fusion energy's benefits: economic advantages, energy independence, a lead in AI & national security. 🧵
October 10, 2025 at 12:07 AM
“The central dynamic of the fusion race is clear: the United States laid the scientific groundwork; China is positioning to win the industry…"
So concludes a new report on the race to reap fusion energy's benefits: economic advantages, energy independence, a lead in AI & national security. 🧵
So concludes a new report on the race to reap fusion energy's benefits: economic advantages, energy independence, a lead in AI & national security. 🧵
"I’m optimistic the ARC power plant will come online within the next decade. When that day comes, it will be a huge win for America’s energy independence—and for the world’s quest for abundant sustainable energy." 1/2
— Bill Gates
#FusionEnergy
— Bill Gates
#FusionEnergy
October 6, 2025 at 6:15 PM
"I’m optimistic the ARC power plant will come online within the next decade. When that day comes, it will be a huge win for America’s energy independence—and for the world’s quest for abundant sustainable energy." 1/2
— Bill Gates
#FusionEnergy
— Bill Gates
#FusionEnergy
This week, we announced that a production version of our groundbreaking magnet technology passed our rigorous testing, clearing it for use in our SPARC fusion machine. The @energygov.bsky.social's Milestone program validated our tests, and awarded CFS $8 million for reaching the milestone.
October 3, 2025 at 6:11 PM
This week, we announced that a production version of our groundbreaking magnet technology passed our rigorous testing, clearing it for use in our SPARC fusion machine. The @energygov.bsky.social's Milestone program validated our tests, and awarded CFS $8 million for reaching the milestone.
Two of our co-founders, CEO Bob Mumgaard and Chief Science Officer Brandon Sorbom, are a rare breed: scientists who earned PhDs in plasma physics who also have deep business acumen. 1/3
October 1, 2025 at 6:12 PM
Two of our co-founders, CEO Bob Mumgaard and Chief Science Officer Brandon Sorbom, are a rare breed: scientists who earned PhDs in plasma physics who also have deep business acumen. 1/3
3/4 Marking the occasion on Monday, Secretary Chris Wright and @massgovernor.bsky.social Gov. Maura Healey visited our headquarters to see how we test our magnets and discuss how we’re working to bring fusion energy to the electricity grid, at scale, as fast as possible.
September 30, 2025 at 1:34 PM
3/4 Marking the occasion on Monday, Secretary Chris Wright and @massgovernor.bsky.social Gov. Maura Healey visited our headquarters to see how we test our magnets and discuss how we’re working to bring fusion energy to the electricity grid, at scale, as fast as possible.
2/4 That achievement unlocked a payment from @energygov.bsky.social's Milestone Based Fusion Development Program, an important fusion energy industry catalyst, after DOE’s panel of experts validated our results.
September 30, 2025 at 1:34 PM
2/4 That achievement unlocked a payment from @energygov.bsky.social's Milestone Based Fusion Development Program, an important fusion energy industry catalyst, after DOE’s panel of experts validated our results.
It’s a great moment to celebrate milestones at CFS — in more ways than one. Today we announced we’re done manufacturing one of our key magnets and putting it through a rigorous, month-long battery of performance tests — which it passed. 1/4
#PowerMoves
#PowerMoves
September 30, 2025 at 1:34 PM
It’s a great moment to celebrate milestones at CFS — in more ways than one. Today we announced we’re done manufacturing one of our key magnets and putting it through a rigorous, month-long battery of performance tests — which it passed. 1/4
#PowerMoves
#PowerMoves
3/3 Our blog post from Ally Yost, Senior Vice President of Corporate Development, digs into the details about how we're working in parallel on SPARC and ARC — and how we've successfully used this approach several times in CFS history already.
September 4, 2025 at 3:43 PM
3/3 Our blog post from Ally Yost, Senior Vice President of Corporate Development, digs into the details about how we're working in parallel on SPARC and ARC — and how we've successfully used this approach several times in CFS history already.
4/4 CFS is now building these magnets at scale in our factory in Devens. We plan to build HTS magnets for the ARC power plant in Devens, too.
We look forward to working with Gov. Healey and her administration as we look to expand our presence in the Commonwealth of Massachusetts.
#Massachusetts
We look forward to working with Gov. Healey and her administration as we look to expand our presence in the Commonwealth of Massachusetts.
#Massachusetts
August 21, 2025 at 10:55 PM
4/4 CFS is now building these magnets at scale in our factory in Devens. We plan to build HTS magnets for the ARC power plant in Devens, too.
We look forward to working with Gov. Healey and her administration as we look to expand our presence in the Commonwealth of Massachusetts.
#Massachusetts
We look forward to working with Gov. Healey and her administration as we look to expand our presence in the Commonwealth of Massachusetts.
#Massachusetts
3/4 The SPARC project will demonstrate here in Massachusetts for the first time in history that fusion energy can work in a commercially scalable machine. That paves the way for our ARC power plants that will bring clean, secure, and affordable energy to the electricity grid. #EnergySky
August 21, 2025 at 10:54 PM
3/4 The SPARC project will demonstrate here in Massachusetts for the first time in history that fusion energy can work in a commercially scalable machine. That paves the way for our ARC power plants that will bring clean, secure, and affordable energy to the electricity grid. #EnergySky
2/4 During her trip, the governor and CEO Bob Mumgaard toured our corporate headquarters, our SPARC fusion facility, and the manufacturing plant where we’re building our groundbreaking magnet technology.
August 21, 2025 at 10:52 PM
2/4 During her trip, the governor and CEO Bob Mumgaard toured our corporate headquarters, our SPARC fusion facility, and the manufacturing plant where we’re building our groundbreaking magnet technology.
We were honored to host Massachusetts Gov. Maura Healey today at our commercial fusion energy campus in Devens, Massachusetts, where we talked about the state’s leadership on clean energy and the role CFS is playing to advance that leadership.
#FusionEnergy
🧵1/4
#FusionEnergy
🧵1/4
August 21, 2025 at 10:50 PM
We were honored to host Massachusetts Gov. Maura Healey today at our commercial fusion energy campus in Devens, Massachusetts, where we talked about the state’s leadership on clean energy and the role CFS is playing to advance that leadership.
#FusionEnergy
🧵1/4
#FusionEnergy
🧵1/4
At a recent conference, our CEO Bob Mumgaard explained how fusion energy is not only the densest power source there is, but also that it has the most abundant fuel. That's why it's also the last energy source that humanity will ever need.
#FusionEnergy #Science
#FusionEnergy #Science
August 20, 2025 at 6:35 PM
At a recent conference, our CEO Bob Mumgaard explained how fusion energy is not only the densest power source there is, but also that it has the most abundant fuel. That's why it's also the last energy source that humanity will ever need.
#FusionEnergy #Science
#FusionEnergy #Science
To keep our magnet factory humming, we sometimes rearrange work stations for speed and flexibility — like adding a second cryostat test stand to make sure our magnets are up to scratch. 1/3
#Magnets
#Magnets
August 7, 2025 at 2:46 PM
To keep our magnet factory humming, we sometimes rearrange work stations for speed and flexibility — like adding a second cryostat test stand to make sure our magnets are up to scratch. 1/3
#Magnets
#Magnets
"Energy unlocks prosperity for people, businesses, and nations. Whoever controls that energy commands an outsized impact on the world and on the future of everyone who lives on it." 1/3
#FusionEnergy
#FusionEnergy
August 1, 2025 at 6:37 PM
"Energy unlocks prosperity for people, businesses, and nations. Whoever controls that energy commands an outsized impact on the world and on the future of everyone who lives on it." 1/3
#FusionEnergy
#FusionEnergy
"History doesn't repeat itself, but it rhymes... We talk about some of the technologies that the US founded — where we have been the inventor, we've done the innovation, we've done the hard work...Then we cede it to China. Fusion is the one thing where the future is yet to be determined." 1/4
July 25, 2025 at 7:20 PM
"History doesn't repeat itself, but it rhymes... We talk about some of the technologies that the US founded — where we have been the inventor, we've done the innovation, we've done the hard work...Then we cede it to China. Fusion is the one thing where the future is yet to be determined." 1/4
The fifth annual @fusionindustry.bsky.social report released today shows an acceleration in fusion industry funding growth, increasing to a total of $9.8 billion. Notable trends in the report below. 1/4 #FusionEnergy
July 22, 2025 at 6:04 PM
The fifth annual @fusionindustry.bsky.social report released today shows an acceleration in fusion industry funding growth, increasing to a total of $9.8 billion. Notable trends in the report below. 1/4 #FusionEnergy