Stephen Shankland
@stshank.bsky.social
Head of Content at Commonwealth Fusion Systems, a company commercializing fusion energy: clean, safe, affordable, secure. Former science and technology journalist. Bird nerd. Assigned to the Conehead clique as a teenager.
Perhaps you're unaware of the pulse length difference between SPARC and ARC? ARC gets a blanket that serves as a cooling system. ARC's pulses will be much longer — long enough to enable ARC's 400MW of continuous electrical power generation.
December 3, 2025 at 5:15 PM
Perhaps you're unaware of the pulse length difference between SPARC and ARC? ARC gets a blanket that serves as a cooling system. ARC's pulses will be much longer — long enough to enable ARC's 400MW of continuous electrical power generation.
We get a lot of mileage out of our blue flame emoji at CFS.
December 2, 2025 at 1:45 PM
We get a lot of mileage out of our blue flame emoji at CFS.
Reposted by Stephen Shankland
3/3 Read more from @skirsner.bsky.social in his recent article about CFS for @masslive.bsky.social.
#FusionEnergy
#FusionEnergy
Can this Mass. startup solve the riddle of fusion power?
Fusion power's big advantages would be that it’s a virtually limitless source of electricity that doesn’t add carbon to the atmosphere, and has lower safety risks compared to traditional nuclear react...
www.masslive.com
December 1, 2025 at 9:38 PM
3/3 Read more from @skirsner.bsky.social in his recent article about CFS for @masslive.bsky.social.
#FusionEnergy
#FusionEnergy
Now there are two of us wondering
November 26, 2025 at 7:22 PM
Now there are two of us wondering
Just finished reading Cloud Atlas. Recommend, though it takes awhile to get the plot moving along fast enough for me to get into page-turner mode. But for the back half the book, I was lapping it up. Curious story structure.
November 22, 2025 at 12:23 AM
Just finished reading Cloud Atlas. Recommend, though it takes awhile to get the plot moving along fast enough for me to get into page-turner mode. But for the back half the book, I was lapping it up. Curious story structure.
Oooooh, I see, thanks. That's a rather unsatisfying approach to the question.
November 22, 2025 at 12:20 AM
Oooooh, I see, thanks. That's a rather unsatisfying approach to the question.
By which I imagine you mean AI itself doing the work and bringing in the bucks directly, not companies cutting $100B worth of deals involving AI? (E.g. customers adding Gemini services to their Google WorkSpace accounts.)
November 21, 2025 at 10:02 PM
By which I imagine you mean AI itself doing the work and bringing in the bucks directly, not companies cutting $100B worth of deals involving AI? (E.g. customers adding Gemini services to their Google WorkSpace accounts.)
He's begun detailing these milestones. The first three blog posts:
1. blog.cfs.energy/first-step-o...
2. blog.cfs.energy/fusion-energ...
3. blog.cfs.energy/fusion-energ...
Our first tokamak, SPARC, is designed to demonstrate the fourth milestone, net fusion energy = Q>1 aka more power out than in.
1. blog.cfs.energy/first-step-o...
2. blog.cfs.energy/fusion-energ...
3. blog.cfs.energy/fusion-energ...
Our first tokamak, SPARC, is designed to demonstrate the fourth milestone, net fusion energy = Q>1 aka more power out than in.
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 21, 2025 at 5:15 PM
He's begun detailing these milestones. The first three blog posts:
1. blog.cfs.energy/first-step-o...
2. blog.cfs.energy/fusion-energ...
3. blog.cfs.energy/fusion-energ...
Our first tokamak, SPARC, is designed to demonstrate the fourth milestone, net fusion energy = Q>1 aka more power out than in.
1. blog.cfs.energy/first-step-o...
2. blog.cfs.energy/fusion-energ...
3. blog.cfs.energy/fusion-energ...
Our first tokamak, SPARC, is designed to demonstrate the fourth milestone, net fusion energy = Q>1 aka more power out than in.
If you want a handy guide for milestones you can use to separate the puffery from the progress, our CEO Bob Mumgaard has this handy guide to the six steps everyone has to take to deliver competitive fusion energy: cfs.energy/news-and-med...
Building Trust in Fusion Energy
The world's largest and leading commercial fusion energy company
cfs.energy
November 21, 2025 at 5:12 PM
If you want a handy guide for milestones you can use to separate the puffery from the progress, our CEO Bob Mumgaard has this handy guide to the six steps everyone has to take to deliver competitive fusion energy: cfs.energy/news-and-med...