Helion’s Orion – Helion Energy’s planned Orion fusion plant near Malaga, Washington aims to deliver 50 megawatts to Microsoft data centers by 2029. The commercial pledge is backed by high-profile private funding, including Sam Altman, but skepticism is mounting inside the comp
Just east of Malaga, Washington—a farm town in apple country where the Columbia River runs between basalt bluffs—the Rock Island Dam has been turning water into electricity for the Pacific Northwest since 1933.
On a flat stretch of land nearby, Helion Energy is building something with none of the familiar machinery. The company’s Orion is intended to become what it calls the world’s first fusion power plant, delivering 50 megawatts of electricity to Microsoft data centers by 2029.
Helion is betting that fusion’s long. stubborn timeline can finally be bent by money. engineering. and manufacturing—rather than waiting for incremental laboratory breakthroughs. David Kirtley, Helion’s CEO, doesn’t hide the pressure. “The pressure’s on for Helion and everyone else,” he says. He has a ready reply to the old joke about fusion always being 20 years away. “I say, ‘We’re 20 years late. We need to step up and build these [plants] and deploy them at scale.’”.
That kind of commitment has become a defining feature of the fusion boom—private capital flooding in. big tech signing power deals years ahead of any machine delivering electricity. AI is part of the urgency, because data centers demand massive, around-the-clock power. Fusion start-ups have responded by selling a path to firm, carbon-free electricity.
Troy Carter, director of the Fusion Energy Division at Oak Ridge National Laboratory, describes it as unlike other energy technologies. “It’s a situation that’s certainly unlike any other energy technology,” he says—adding, “maybe unlike other technologies.”
But even the most aggressive schedule can’t change the core requirement. To make fusion work on Earth. hydrogen nuclei must be heated into plasma at temperatures above 100 million degrees Celsius. then kept hot. dense. and stable long enough for enough reactions to occur. Fuel and materials pose additional constraints.
Helion and others tend to focus on deuterium and tritium, both hydrogen isotopes. The issue is that deuterium-tritium fusion throws off fast neutrons that degrade the machine built to contain the reaction. Tritium, which is radioactive with a relatively quick half-life of 12 years, also barely exists in nature. Any reactor running on deuterium-tritium fuel will need to breed its own tritium supply—a burden Carter says the industry has yet to seriously address. leaving the field to hope national labs will carry that load.
Helion is banking on an unusual approach: a linear reactor built around a plasma shape called a field-reversed configuration. or FRC. Carter contrasts FRCs with other reactor concepts. In tokamaks, plasma forms inside a doughnut-shaped steady-state chamber; in stellarators, plasma is an asymmetrical ribbon. FRC plasma holds itself in place, resembling a spinning smoke ring. Carter says that means an FRC reactor “has very few external magnets. ” with “much less complex” magnets. “much lower field and less costly” than alternatives.
The catch is stabilization. FRC plasmas are famously hard to keep stable as they take in more energy.
Experimental physicist John Slough describes what Helion’s team is trying to harness: “The unique thing about FRCs: We call them ‘self-organized.’” He compares it to something fragile but manageable. “It’s like spinning a top.” Then he draws the warning: “But ‘if you try to screw around with it. you’re just going to mess it up.’”.
Slough spent decades working to keep the idea alive. By the early 2000s, federal support for alternative fusion concepts had largely dried up. Slough, then at the University of Washington, continued with limited resources, including small space-propulsion contracts from NASA and the U.S. Air Force.
A key insight, he says, was a method for jumping quickly toward fusion-relevant conditions. Two FRC plasmoids could be formed with magnetic pulses at either end of the reactor. They would accelerate toward each other at up to 1.6 million kilometers per hour. collide. and merge—using the collision itself as a shortcut to fusion temperatures. The reaction takes place in fractions of a millisecond. with a rapid stream of pulses repeatedly heating. compressing. and expanding the fuel to generate electricity.
Around 2008, Slough hired Kirtley—then a young aerospace engineer—from MSNW. As federal support ebbed, Kirtley saw what Slough did not: the seed of a start-up. With Slough’s blessing. Kirtley and an engineering technician named Chris Pihl took the concept to start-up incubator Y Combinator. which was then run by Altman. Helion took off.
Helion’s rise fits a recurring fusion pattern: when public money dries up, some ideas get reborn as companies. The company’s story also depends on another bet—what comes after the fusion reaction.
Most fusion power-plant designs use fusion heat to boil water, spin a turbine, and drive a generator. Helion is skipping that thermal cycle. As the merged plasma expands after each fusion pulse. it should push back against the magnetic field and induce electric current directly in coils surrounding the machine. Helion claims that when the plasma generates current directly, it can recover electricity at efficiencies over 95 percent.
Kirtley treats that figure as the linchpin. “Fundamental to our technology is direct electricity recovery,” he says. “If you can recover the electricity at 95 percent efficiency. fusion has to do only that [last] little bit.” Carter agrees—if Helion can achieve it. “That’s a real advantage for Helion. ” he says. which “does lower the bar. if they can do that. on how much gain they need.”.
That “if” is where the uncertainty sharpens.
Helion says it has built seven prototype machines, each more powerful than the last. Its latest, Polaris, is a 19-meter device with capacitor banks capable of storing and delivering 50 megajoules of energy per pulse. Earlier this year. Helion said Polaris reached a record 150 million degrees C and became the first privately developed fusion machine used to “demonstrate” fusion using deuterium-tritium fuel.
The company’s testing has been followed by an engineering sprint aimed at making rapid repetition possible. Helion had to replace research-grade switches with solid-state hardware designed to survive hundreds of millions of pulses. It also constructed thousands of specialized high-voltage capacitors. Polaris needs enough of those oil-filled devices to fill 150 shipping containers.
To make the whole system work, each pulse has to happen in perfect synchrony—down to nanosecond timings. Anthony Pancotti, a Helion co-founder, describes the pace in a single image: “It produces fusion, recovers that energy, before you can blink your eye.” He compares the pulse to a camera flash.
Helion’s manufacturing plan flows from this pulsed approach. The company imagines many modular generators assembled in factories and shipped like server racks for energy. It now employs around 600 people, with a heavy emphasis on technicians rather than scientists.
Helion has also taken its promises beyond the lab into contracts. In 2023. it announced what it called the first power purchase agreement in fusion. committing to open its Malaga plant by 2028 and supply Microsoft with 50 megawatts of electricity by the following year. with financial penalties for nondelivery. A few months later, Helion announced a 500-megawatt development deal with steelmaker Nucor. Altman recently stepped off the company’s board as OpenAI and Helion explored a possible partnership.
Yet a power deal is not the same as a power plant.
Helion’s history, like that of many fusion projects, includes missed deadlines. The company once projected net electricity from an earlier machine by 2024. As the Microsoft date looms, no published results have confirmed net power generation from Polaris.
The most pointed criticism comes from Slough—the co-founder whose FRC research helped to seed the company itself. Slough has since split with Helion, and his objection goes straight to the heart of the design. For him, the fundamental problem remains confinement. He argues that Helion’s aggressive method—firing plasmas together at extreme speed and compressing them—drives instabilities severe enough to produce a “catastrophic” loss of flux before fusion can do the work Helion needs.
In his view, there is no escaping that tradeoff. “You’ve run up against a fundamental aspect of the FRC,” he says.
Slough also questions Helion’s longer-term direction. Orion, the ultimate endgame, is planned to run on deuterium and helium-3. That fuel choice would produce fewer higher-energy neutrons and maximize direct capture of electricity. But helium-3 is exceedingly scarce, and achieving fusion with it is harder: it requires temperatures of about 200 million degrees C.
Slough says the heat and confinement requirements are physically implausible with Helion’s design. Where he once saw potential pathways, he now “can’t see anything in the physics” that would allow it.
Kirtley counters that Slough is relying on “dated” one-dimensional models that ignore the speed of Helion’s pulses. “Many instabilities do not have enough time to grow. ” he says. arguing that Helion’s machines remain stable enough to complete formation. merging. compression. and fusion on the required timescale. Helion also plans to breed helium-3 from tritium. and says that its models suggest it can convert more than 85 percent of the plasma’s energy into useful electricity.
Then there is the question of transparency—how much outsiders can verify. Helion publishes very little peer-reviewed data about core plasma performance, making it hard for outside scientists to evaluate the claims. Carter points to that gap directly. “They don’t publish, and that’s a stance they take,” he says. Without more data, he adds, “it is hard to fully assess where they’re headed.”.
A separate thread of scrutiny comes from Karl Lackner of the Max Planck Institute for Plasma Physics in Germany. Lackner’s group published formal comments in the Journal of Fusion Energy in February. Their target: a 2023 paper by Kirtley and Helion scientist Richard Milroy that lays out the physics case for Helion’s deuterium–helium-3 approach.
Central to the projected energy gains is the idea that ions can remain far hotter than electrons after collision and compression. reducing the energy input required to sustain the reaction. Lackner’s group argues that once ordinary collisional power transfer is accounted for. the requirements become “much more demanding” than Helion’s analysis suggests.
Helion responds that Lackner’s analysis does not account for the cadence of its pulses. A favorable ion-electron temperature ratio might help, but the real issue, Helion says, is whether “the pulse evolves quickly enough” for nonequilibrium conditions to support efficient fusion and energy recovery.
None of this guarantees Helion will fail. Fusion has a long record of missed deadlines and delayed breakthroughs. But the industry’s shape has been altered by private money. Deals and manufacturing ambitions have forced questions that once belonged mostly to lab science—questions about supply chains. components. and how to build machines at industrial scale.
Carter, whose 2021 U.S. Department of Energy report set a 2040 target for the first fusion pilot plant before private capital accelerated the timeline, thinks a pilot plant in the 2030s is feasible. He is emphatic that no single company can get there alone.
The supply-chain dimension makes that stark. Helion makes its own capacitors and ultrahigh-pressure ceramics. Other fusion companies need similar components. Commonwealth Fusion Systems, based in Massachusetts, is building infrastructure to produce high-temperature superconducting magnets it needs. But, Carter says, no start-up can fully internalize industrial-scale obstacles on its own.
In April, the U.S. Department of Energy’s Advanced Research Projects Agency for Energy. ARPA-E. said it will invest $135 million—its largest fusion investment to date—to address the “toughest technical barriers” to commercial-scale fusion. Carter says public support for supply-chain gaps is exactly what should be explored. “If there’s a way for the public sector to support these supply-chain gaps. ” he says. “that’s something we should be looking at.”.
Back near Malaga, the construction continues. Orion is rising on the plain above the Columbia River. Not far away, Helion is preparing a new assembly facility to piece together thousands of intricate components.
A short distance downstream, the dam still turns falling water into light.
Whether Helion will deliver by 2028 remains uncertain. Fusion’s ability to contribute meaningfully to the grid in the 2030s also depends on physics that still has to cooperate. What’s already changed is the frame: by treating fusion as a manufacturing challenge as much as a scientific one. Helion has shifted what the industry considers possible—and how quickly.
Helion Energy Orion fusion fusion electricity Microsoft data centers Malaga Washington David Kirtley Sam Altman field-reversed configuration FRC tritium breeding deuterium helium-3 ARPA-E Oak Ridge National Laboratory Polaris direct electricity recovery