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Commonwealth Fusion Systems

@cfs.energy
679 followers 122 following 588 posts

We’re on a mission to deliver clean fusion energy to the planet fast enough to matter for humanity’s biggest challenges.⚡️🔆💫 SPARC®, ARC™, and Fall Line™ Fusion Power Station are trademarks of Commonwealth Fusion Systems®.

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Commonwealth Fusion Systems @cfs.energy · 6h
Fusion energy is often discussed as a matter of plasma physics, funding, and machine design, but bringing commercial fusion to the grid also requires a global industrial base that can manufacture critical components at scale. 1/4
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Commonwealth Fusion Systems @cfs.energy · 29/09/2026
“Think about what [fusion] means in a technological race. Power is the thing that powers the next economy, right? All the geostrategic strife we have right now is about power in the form of natural resources... 1/5
CFS CEO and Co-founder Bob Mumgaard speaking at the Heatmap News House during Climate Week NYC 2026.
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Commonwealth Fusion Systems @cfs.energy · 28/09/2026
#FusionEnergy costs are indeed key to its eventual success. Those costs are deeply connected to a fusion company’s choice of architecture, where it’s critical not only that the eventual power plants can be economical, but fundamentally, that a commercially relevant machine can actually work. 1/3
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Commonwealth Fusion Systems @cfs.energy · 25/09/2026
It was a bustling and productive week at #ClimateWeekNYC, and our team joined a variety of conversations about subjects on everyone's mind — not just climate, but also energy security, AI, and more. 1/3
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Commonwealth Fusion Systems @cfs.energy · 24/09/2026
Some big progress advancing fusion energy in the United States today: the introduction of the American Leadership in Fusion Act, a bill with bipartisan backing that would hasten the day that the country could benefit from this new source of energy. 1/5
Aerial view of Commonwealth Fusion Systems' SPARC facility in Devens, Massachusetts.
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Commonwealth Fusion Systems @cfs.energy · 23/09/2026
We’re glad to reveal that Commonwealth Fusion Systems has made it on to the 50 by 2050 list, a collection of companies tackling the physical world’s hardest challenges — areas like agriculture, transportation, industry, critical resources, computing, and our own business, power generation. 1/3
Photo of the exterior of a Commonwealth Fusion Systems building with the CFS logo
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Commonwealth Fusion Systems @cfs.energy · 22/09/2026
In case you've been wondering — yes, we've been quite busy 🧲. We're now up to eight installed toroidal field (TF) magnets of the 18 total our SPARC fusion machine needs to help confine its superhot plasma. 1/2
youtube.com
Serious progress installing fusion magnets for SPARC #FusionEnergy #Magnets
YouTube video by Commonwealth Fusion Systems
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Commonwealth Fusion Systems @cfs.energy · 21/09/2026
We're looking forward to being part of the conversation this week at #ClimateWeekNYC and introducing our clean energy technology to anyone who's not up to speed on fusion. 1/5
A photo of the exterior of Commonwealth Fusion System's SPARC facility with a prominent CFS logo on the side of a building.
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Commonwealth Fusion Systems @cfs.energy · 18/09/2026
"We see energy as a fundamental lever for growth...We believe fusion can provide this source of energy." 1/3
youtube.com
Why we're on a mission to delivery fusion energy to the world as fast as possible
YouTube video by Commonwealth Fusion Systems
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Commonwealth Fusion Systems @cfs.energy · 16/09/2026
The cryogenic team at CFS, responsible for the system that pulls heat from the SPARC tokamak and cools its magnets, recently hit a major achievement: Getting SPARC's cryogenic system down to its operating temperature of 8 kelvin. 1/4 youtu.be/eZcoMqijqDA
youtu.be
The most extreme temperature gradient in the solar system
YouTube video by Commonwealth Fusion Systems
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Commonwealth Fusion Systems @cfs.energy · 03/09/2026
“We're dealing with a situation today in fusion where the toolset available to the innovator is just so much broader and deeper than it was even five years ago.” 1/4
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Commonwealth Fusion Systems @cfs.energy · 02/09/2026
CFS is gearing up for SPARC’s dry dress rehearsal (DDR), firing up our tokamak’s support systems. In parallel with tokamak assembly, we're validating critical support systems like power and cooling under real operating conditions. 1/2
A CFS team member works inside the cryogenic plant inside Commonwealth Fusion Systems' SPARC fusion facility
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Commonwealth Fusion Systems @cfs.energy · 01/09/2026
"It's definitely tied to the fact that it's tangible. You can show up at our facility, at national labs and universities, and you can see it. We've also been very transparent. We've done this in an open way that gives people more and more confidence." 1/4
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Commonwealth Fusion Systems @cfs.energy · 28/08/2026
At CFS, we’re very confident that our SPARC tokamak will generate net fusion energy, a crucial performance threshold also called Q>1. 1/3
blog.cfs.energy
Why CFS is confident we’ll demonstrate net fusion energy: Q>1 | The Tokamak Times
Only one machine in the world has achieved net fusion energy. Here’s why we're confident our SPARC fusion demonstration machine will be the next.
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Commonwealth Fusion Systems @cfs.energy · 27/08/2026
Big, world-changing technologies don't happen in a flash. They're built on days, then months, and then years of steady progress toward a singular goal. When we turn on our #SPARC tokamak and generate net fusion energy, it may feel like an overnight success to those who haven't tracked us. 1/3
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Commonwealth Fusion Systems @cfs.energy · 25/08/2026
The future of fusion isn't built all at once. As #SPARC moves closer to operation, our team is commissioning the systems that make fusion possible — 1/4
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Commonwealth Fusion Systems @cfs.energy · 24/08/2026
"Fusion provides energy that can be built anywhere and operated at any time. That contrasts with renewables, which have intermittency and geographic constraints. It contrasts with nuclear fission, which has geopolitical constraints..." 1/4 deloitte.wsj.com/ceo/how-fusi...
deloitte.wsj.com
How Fusion Energy Could Change the CEO Energy Playbook - WSJ
Commonwealth Fusion Systems CEO Bob Mumgaard says corporate CEOs should be tracking fusion now as it approaches commercial viability, not sitting on the sidelines
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Commonwealth Fusion Systems @cfs.energy · 13/08/2026
"It’s not like the progress just comes out of thin air. It comes out of real engineers doing real improvements across an entire system to get to the point of net positive energy. And that’s why fusion is at a great moment." 1/5
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Commonwealth Fusion Systems @cfs.energy · 06/08/2026
What's different now about commercializing fusion energy compared to past efforts? Three things, CFS CEO and Co-founder Bob Mumgaard told Adele Peters of @fastcompany.com. 1/5
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Commonwealth Fusion Systems @cfs.energy · 05/08/2026
Our first three achievements as part of the @departmentofenergy.bsky.social (DOE)’s Milestone-Based Fusion Development Program centered on our SPARC fusion demonstration machine. Now we’ve attained the next two DOE milestones — this time recognizing SPARC’s successor, ARC. 1/6 #FusionEnergy #Energy
The ARC power plant tokamak
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Commonwealth Fusion Systems @cfs.energy · 03/08/2026
If you want to literally build the future, we're holding a hiring day on Saturday, August 15 for production technicians who can help our work in fusion energy innovation. It’ll be at CFS headquarters in Devens, Massachusetts. 1/3
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Commonwealth Fusion Systems @cfs.energy · 30/07/2026
Today, CFS announced another major advance in our fusion energy push: we raised an additional $1 billion in funding. This is the largest investment round in commercial fusion worldwide since our $1.8 billion funding round in 2021, bringing our total capital raised to $4 billion. 1/4 #FusionEnergy
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Commonwealth Fusion Systems @cfs.energy · 24/07/2026
“It’s been one of the largest private backings of any energy company. It really is an enabler of our ability to go fast. In many ways we look like a SpaceX-type structure — we’re integrated, do a lot of work ourselves, with iteration very quickly and in parallel..." 1/3
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Reposted by Commonwealth Fusion Systems
CSIS Economic Security and Technology Department @est.csis.org · 22/07/2026
🔴 Live now! Betting on America "Is the United States Winning the Fusion Race?" Featuring Bob Mumgaard, Co-Founder and CEO of @cfs.energy @navingirishankar.bsky.social asks whether fusion can usher in virtually limitless clean energy—and whether the US will lead the way.
tinyurl.com
Is the United States Winning the Fusion Race? Featuring Bob Mumgaard, Co-Founder and CEO of Commonwealth Fusion Systems | Betting on America | CSIS Events
Bob Mumgaard, co-founder and CEO of Commonwealth Fusion Systems, joins Navin Girishankar to discuss whether fusion can usher in an era of virtually limitless clean energy—and whether the United…
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Reposted by Commonwealth Fusion Systems
Stefan Urbat @stefanurb.bsky.social · 15/07/2026
South Korea as future key fusion supply chain country: www.mk.co.kr/en/it/12099437 interview with CEO of @cfs.energy #fusionenergy
mk.co.kr
"South Korea will be a 'top five' country in the global fusion supply chain." Bob Mumgard, CEO of Co.. - MK
"South Korea will be a 'top five' country in the global fusion supply chain." Bob Mumgard, CEO of Commonwealth Fusion Systems (CFS), the world's largest private fusion company, pointed to South Korea ...
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Commonwealth Fusion Systems @cfs.energy · 13/07/2026
In the last year, investors brought $4.5 billion of new funding to fusion companies, dwarfing governmental fusion budgets, according to the newest @fusionindustry.bsky.social yearly report on the industry. 1/4
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Commonwealth Fusion Systems @cfs.energy · 08/07/2026
It's been a busy six months at Commonwealth Fusion Systems (CFS). In the newest of our twice-yearly video updates, CEO Bob Mumgaard discusses how dry dress rehearsal is occurring in parallel with #SPARC assembly, and shares other recent progress: 1/3
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Commonwealth Fusion Systems @cfs.energy · 02/07/2026
In its 250 years, America has created some of the most influential innovations in human history. Now, almost 60 years after putting a man on the moon, we’re on the cusp of bringing a star to Earth. 1/2 #America250 #IndependenceDay #AmericanInnovation
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Commonwealth Fusion Systems @cfs.energy · 01/07/2026
The @ukaeaofficial.bsky.social has established a program to test technology that’s crucial for producing fusion fuel — and CFS will be the first organization to take advantage of it. Today, we announced this new collaboration with the UKAEA’s Lithium Breeding Tritium Innovation (LIBRTI) program. 1/4
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Commonwealth Fusion Systems @cfs.energy · 30/06/2026
We’re live with our second AMA (as me anything) on Reddit — this time a Q&A with four physicists who co-authored the five peer-reviewed papers that lay the physics foundation for our ARC fusion power plant. 🧵1/3 www.reddit.com/r/fusion/com... #FusionEnergy #Physics #AMA
reddit.com
Hi r/fusion! We’re the Physicists Behind the Commonwealth Fusion Systems’ Papers on the Physics of the ARC Fusion Power Plant. Ask Us Anything!
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Commonwealth Fusion Systems @cfs.energy · 29/06/2026
"I don’t believe fusion would happen without welders. Welding is basically materials science practiced in reality." – Lex Palmer, CFS Welding Engineering Manager 1/5
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Commonwealth Fusion Systems @cfs.energy · 25/06/2026
It’s time for another Reddit Ask Me Anything (AMA) — only this time it’s more of an Ask Us Anything. From 9:30–11:30 a.m. ET on June 30, four of our physicists will answer your questions on our five new peer-reviewed papers about the physics basis of our ARC fusion power plant. 1/5 #FusionEnergy
Alex Creely, CFS Chief Engineer for ARC
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Reposted by Commonwealth Fusion Systems
Fusion Industry Association @fusionindustry.bsky.social · 23/06/2026
Today - live from the first Fusion Supply Chain Trade Show - we're launching the 2026 Fusion Industry Supply Chain Report. Read the full report here: fusionindustryassociation.org/news/from-th... Press Release: fusionindustryassociation.org/fia-launches...
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Commonwealth Fusion Systems @cfs.energy · 23/06/2026
So how do you confine a superhot, 100M°C fusion plasma? With superstrong magnets, of course. 🧲 1/3 #SPARC
youtube.com
Installing SPARC's third superstrong TF magnet #SPARC #Magnets #FusionEnergy
YouTube video by Commonwealth Fusion Systems
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Commonwealth Fusion Systems @cfs.energy · 22/06/2026
We’re glad to see the @cleanaircatf.bsky.social launch the Materials Database for Fusion (MatDB4Fusion) effort with a strong public-private international steering committee. 🧵 1/3 Announcement: www.catf.us/2026/06/catf... #FusionEnergy
catf.us
CATF announces Steering Committee to guide global fusion materials database MatDB4Fusion
Clean Air Task Force today announced the formation of the Steering Committee for the International Working Group on Materials Database for Fusion.
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Commonwealth Fusion Systems @cfs.energy · 16/06/2026
"One of the nice things about this technology is that when you look at the fundamentals behind it, there's not a lot of barriers to scaling..." 1/3 #FusionEnergy #Energy
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Commonwealth Fusion Systems @cfs.energy · 10/06/2026
“Support from the government would be essential … otherwise we fall into the trap we’ve fallen into many times before, where the U.S. seeds innovation with an 's' and then cedes it with a 'c'.” 1/3
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Commonwealth Fusion Systems @cfs.energy · 09/06/2026
Our eyes, ears, and fingertips are good for figuring out a lot of what’s going on around us. But to understand the inner workings of a fusion energy machine, you need more than human senses. That’s where diagnostic equipment comes into play. Here’s how we use diagnostics at CFS. 1/6
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Commonwealth Fusion Systems @cfs.energy · 08/06/2026
On Thursday, we published five peer-reviewed papers that set the plasma physics foundation for our ARC fusion power plant, tackling the challenges and showing no showstoppers. 1/2
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Commonwealth Fusion Systems @cfs.energy · 04/06/2026
Today, we laid the physics foundation for our ARC fusion power plant. ⚛️ With 5 deeply researched papers — validated by independent peer review and published in the Journal of Plasma Physics from @universitypress.cambridge.org — we’ve shown we've nailed the science of producing fusion power. 1/7
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Commonwealth Fusion Systems @cfs.energy · 20/05/2026
Today we announced a new strategic agreement with the Singapore-based @astarsg.bsky.social. This 5-year collaboration is designed to develop technologies for commercial fusion power plants. 1/7 #FusionEnergy
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Commonwealth Fusion Systems @cfs.energy · 14/05/2026
100 million degrees Celsius. That how hot our plasma will be after our SPARC fusion demonstration machine begins operations in 2027. With both halves of our vacuum vessel now inside tokamak hall, we’ve begun readying them to host the most intense conditions in the solar system. 🧵 1/3 #FusionEnergy
youtu.be
100 million degrees: Step inside the heart of SPARC
YouTube video by Commonwealth Fusion Systems
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Reposted by Commonwealth Fusion Systems
Chuck McCutcheon @chuckmccutcheon.bsky.social · 28/04/2026
From @bengeman.bsky.social: Commonwealth Fusion Systems announces new step toward making U.S. fusion real www.axios.com/2026/04/28/c...
axios.com
Commonwealth announces new step toward making U.S. fusion real
It has formally filed a request with grid operator PJM to connect its planned power plant in Virginia.
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Commonwealth Fusion Systems @cfs.energy · 01/05/2026
“Over and over we meet long-term milestones, like securing our supply of high-temperature superconducting (HTS) tape, delivering our first prototype magnet, building a factory, and taking delivery of long-lead equipment,” said CFS Chief Commercial Officer Rick Needham... 1/4
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Commonwealth Fusion Systems @cfs.energy · 28/04/2026
Today we announced a new major step in our commercialization effort: We’ve applied to plug our first ARC fusion power plant into the grid. This crucial move shows that CFS is successfully navigating the complexities of delivering power, not just generating it. 1/5 #PowerMoves
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Commonwealth Fusion Systems @cfs.energy · 24/04/2026
“Fusion uses tritium, but it also makes it as it goes. It’s sort of like a sourdough starter. You use it and then regenerate it— that’s been shown to work in various labs. So to do it, you need a little bit of starter. Right now, that starter comes mostly from fission power plants.” 1/5
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Commonwealth Fusion Systems @cfs.energy · 21/04/2026
We just wrapped up our second Boundary Collaborators Workshop — a conference that lets Commonwealth Fusion Systems (CFS) experts meet with peers from universities, national labs, and companies whom we invite over to dig into the physics of our fusion machines. 🧵 1/6 #FusionEnergy #physics 🔌💡
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Commonwealth Fusion Systems @cfs.energy · 14/04/2026
"Unlocking fusion energy is not simply a technological milestone, but it is the foundation of energy security, economic competitiveness, and geopolitical power in the twenty-first century,” concludes the @csis.org. 1/3 #FusionEnergy
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Commonwealth Fusion Systems @cfs.energy · 09/04/2026
It’s time for a new inside look at the #SPARC facility, where we're about 75% done building our machine to demonstrate fusion energy’s commercial viability. 1/4
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Commonwealth Fusion Systems @cfs.energy · 06/04/2026
"[This is] the first time [we've had] energy technology that's gone all the way from Newton's laws on some of the biggest scientific compute all the way to a real-time control system and...digital representation of a plant." 1/4 #FusionEnergy
youtube.com
How fusion simulations went from months to milliseconds to run #FusionEnergy #AI
YouTube video by Commonwealth Fusion Systems
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