Sign In or Create an Account.

By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy

Climate Tech

Thea Energy Hits Milestone in Quest to Simplify Fusion

This fusion startup is ahead of schedule.

Fusion.
Heatmap Illustration/Getty Images, Thea Energy

Thea Energy, one of the newer entrants into the red-hot fusion energy space, raised $20 million last year as investors took a bet on the physics behind the company’s novel approach to creating magnetic fields. Today, in a paper being submitted for peer review, Thea announced that its theoretical science actually works in the real world. The company’s CEO, Brian Berzin, told me that Thea achieved this milestone “quicker and for less capital than we thought,” something that’s rare in an industry long-mocked for perpetually being 30 years away.

Thea is building a stellarator fusion reactor, which typically looks like a twisted version of the more common donut-shaped tokamak. But as Berzin explained to me, Thea’s stellarator is designed to be simpler to manufacture than the industry standard. “We don’t like high tech stuff,” Berzin told me — a statement that sounds equally anathema to industry norms as the idea of a fusion project running ahead of schedule. “We like stuff that can be stamped and forged and have simple manufacturing processes.”

The company thinks it can achieve simplicity via its artificial intelligence software, which controls the reactor’s magnetic field keeping the unruly plasma at the heart of the fusion reaction confined and stabilized. Unlike typical stellarators, which rely on the ultra-precise manufacturing and installment of dozens of huge, twisted magnets, Thea’s design uses exactly 450 smaller, simpler planar magnets, arranged in the more familiar donut-shaped configuration. These magnets are still able to generate a helical magnetic field — thought to keep the plasma better stabilized than a tokamak — because each magnet is individually controlled via the company’s software, just like “the array of pixels in your computer screen,” Berzin told me.

“We’re able to utilize the control system that we built and very specifically modulate and control each magnet slightly differently,” Berzin explained, allowing Thea to “make those really complicated, really precise magnetic fields that you need for a stellarator, but with simple hardware.”

This should make manufacturing a whole lot easier and cheaper, Berzin told me. If one of Thea’s magnets is mounted somewhat imperfectly, or wear and tear of the power plant slightly shifts its location or degrades its performance over time, Thea’s AI system can automatically compensate. “It then can just tune that magnet slightly differently — it turns that magnet down, it turns the one next to it up, and the magnetic field stays perfect,” Berzin explained. As he told me, a system that relies on hardware precision is generally much more expensive than a system that depends on well-designed software. The idea is that Thea’s magnets can thus be mass manufactured in a way that’s conducive to “a business versus a science project.”

In 2023, Thea published a technical report proving out the physics behind its so-called “planar coil stellarator,” which allowed the company to raise its $20 million Series A last year, led by the climate tech firm Prelude Ventures. To validate the hardware behind its initial concept, Thea built a 3x3 array of magnets, representative of one section of its overall “donut” shaped reactor. This array was then integrated with Thea’s software and brought online towards the end of last year.

The results that Thea announced today were obtained during testing last month, and prove that the company can create and precisely control the complex magnetic field shapes necessary for fusion power. These results will allow the company to raise a Series B in the “next couple of years,” Berzin said. During this time, Thea will be working to scale up manufacturing such that it can progress from making one or two magnets per week to making multiple per day at its New Jersey-based facility.

The company’s engineers are also planning to stress test their AI software, such that it can adapt to a range of issues that could arise after decades of fusion power plant operation. “So we’re going to start breaking hardware in this device over the next month or two,” Berzin told me. “We’re purposely going to mismount a magnet by a centimeter, put it back in and not tell the control system what we did. And then we’re going to purposely short out some of the magnetic coils.” If the system can create a strong, stable magnetic field anyway, this will serve as further proof of concept for Thea’s software-oriented approach to a simplified reactor design.

The company is still years away from producing actual fusion power though. Like many others in the space, Thea hopes to bring fusion electrons to the grid sometime in the 2030s. Maybe this simple hardware, advanced software approach is what will finally do the trick.

Yellow

You’re out of free articles.

Subscribe today to experience Heatmap’s expert analysis 
of climate change, clean energy, and sustainability.
To continue reading
Create a free account or sign in to unlock more free articles.
or
Please enter an email address
By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy
Climate Tech

Why Is Thea Energy, the Fusion Company, in New Jersey?

The birthplace of electricity has more recently been known more for smokestacks and traffic jams than world-changing energy breakthroughs. But that could be about to change.

New Jersey things.
Heatmap Illustration/Getty Images, Wikimedia Commons, Thea Energy

Why New Jersey? I’ll admit, that’s what I was wondering as my S.U.V. took a Sopranos-adjacent route from midtown Manhattan to an industrial park in Kearny, the Newark suburb bounded by the Passaic River to the west and a landfill to the east, where the holy grail of energy may soon be forged.

I was visiting the nuclear fusion company Thea Energy, which is in the process of designing a stellarator, a kind of torqued donut — French crullers were mentioned several times by Thea cofounder and chief executive Brian Berzin during my time there — that, with the help of 450 magnets and about 15 megawatts of power, could one day hold plasma in place, thereby creating the conditions for the same nuclear reaction that powers the stars to happen here on Earth.

Keep reading...Show less
Blue
Politics

Internal Agency Memo Calls for Political Reviews of Solar, Wind Projects

The widely circulating document lists more than 68 activities newly subject to upper-level review.

Doug Burgum.
Heatmap Illustration/Getty Images

The federal government is poised to put solar and wind projects through strict new reviews that may delay projects across the country, according to a widely circulating document reviewed by Heatmap.

The secretarial order authored by Interior Secretary Doug Burgum’s Deputy Chief of Staff for Policy Gregory Wischer is dated July 15 and states that “all decisions, actions, consultations, and other undertakings” that are “related to wind and solar energy facilities” will now be required to go through multiple layers of political review from Burgum’s office and Interior’s Office of the Deputy Secretary.

Keep reading...Show less
Energy

AI Could Help Decarbonize the Grid. It’s Already Helping Find More Oil.

Two former Microsoft employees have turned their frustration into an awareness campaign to hold tech companies accountable.

AI and oil drilling.
Heatmap Illustration/Getty Images

When the clean energy world considers the consequences of the artificial intelligence boom, rising data center electricity demand and the strain it’s putting on the grid is typically top of mind — even if that’s weighed against the litany of potential positive impacts, which includes improved weather forecasting, grid optimization, wildfire risk mitigation, critical minerals discovery, and geothermal development.

I’ve written about a bunch of it. But the not-so-secret flip side is that naturally, any AI-fueled improvements in efficiency, data analytics, and predictive capabilities will benefit well-capitalized fossil fuel giants just as much — if not significantly more — than plucky climate tech startups or cash-strapped utilities.

Keep reading...Show less
Blue