TAE Technologies

TAE Technologies, Inc.
Company type	Private
Industry	Fusion power, Energy technology
Founded	1998
Headquarters	Foothill Ranch, California, United States
Key people	Michl Binderbauer (CEO), Steven Specker (advisor), Bruce Bauer (head of TAE Life Sciences), David Roberts (head of TAE Power Solutions)
Products	Aneutronic fusion reactors, fusion research platforms, boron neutron capture therapy technology, power management technologies
Owner	Private investors including Goldman Sachs, Vulcan Inc., Venrock, New Enterprise Associates, Rusnano, Wellcome Trust, Kuwait Investment Authority
Number of employees	250+ (2021)

TAE Technologies, Inc., previously known as Tri Alpha Energy, is a privately held American enterprise located in Foothill Ranch, California that specializes in the advancement of aneutronic fusion power. The company’s approach utilizes a sophisticated beam-driven field-reversed configuration (FRC) that integrates principles from accelerator physics and fusion science, specifically optimized for hydrogen-boron (p-¹¹B) fuel.^[1] TAE routinely disseminates both theoretical analyses and experimental findings through scientific publications and conferences, while maintaining a comprehensive research archive accessible on its website.^[2]^[3] To date, the firm has engineered five iterations of fusion platforms and is currently developing a sixth generation aimed at producing a prototype commercial fusion reactor by 2030.^[4]^[5]

Organization

Established in 1998 with private funding, the company maintained a low profile for many years, postponing its website launch until 2015 and seldom revealing details about its progress or commercialization schedule. Throughout its development, TAE has consistently filed and renewed numerous patents related to fusion technologies.

By 2021, TAE Technologies had grown to over 250 employees and secured more than US$880 million in capital investments.

Funding

The company’s primary financial backing has originated from Goldman Sachs alongside venture capital firms such as Microsoft co-founder Paul Allen's Vulcan Inc., the Rockefeller-affiliated Venrock, and Richard Kramlich's New Enterprise Associates. In October 2012, the Russian government invested through the joint-stock entity Rusnano, with CEO Anatoly Chubais joining TAE’s board. Additional investors include the Wellcome Trust and the Kuwait Investment Authority. By mid-2017, total funds raised surpassed $500 million, increasing to over $600 million by 2020, approximately $880 million in 2021, and reaching $1.2 billion by 2022.

Leadership and board of directors

TAE Technologies’ fusion technology traces back to physicist Norman Rostoker, originating as a spin-off from his research at the University of California, Irvine. Steven Specker, formerly CEO of the Electrical Power Research Institute (EPRI), served as CEO from October 2016 until July 2018. Following Specker’s departure, Michl Binderbauer, who completed his PhD in plasma physics under Rostoker at UCI and previously held the CTO position, assumed the CEO role; Specker continues to provide advisory support. The board features distinguished members including former General Electric CEO Jeff Immelt, ex-Morgan Stanley CEO John J. Mack, and former United States Secretary of Energy Ernest Moniz, who joined in May 2017.

Collaborators

Since 2014, TAE Technologies has collaborated with Google to process plasma behavior data from fusion reactors. In 2017, utilizing a machine learning approach based on the "Optometrist Algorithm" developed through this partnership, the company achieved notable advancements in plasma confinement and stability relative to its earlier C-2U device. These outcomes were documented in Scientific Reports.

In November 2017, TAE became part of the U.S. Department of Energy's "Innovative and Novel Computational Impact on Theory and Experiment" initiative, gaining access to the Cray XC40 supercomputing system.

In 2021, TAE announced a collaborative three-year research agreement with Japan’s Institute for Fusion Science (NIFS) to investigate hydrogen-boron fuel reactions using NIFS's Large Helical Device (LHD).

TAE Life Sciences

In March 2018, TAE Technologies secured $40 million in funding to create TAE Life Sciences, a subsidiary dedicated to progressing boron neutron capture therapy (BNCT) for cancer treatment. This financing round was led by ARTIS Ventures. The subsidiary collaborated with Neuboron Medtech to implement its beam delivery system. Bruce Bauer heads TAE Life Sciences, which shares board members with TAE Technologies.

TAE Power Solutions

TAE Technologies introduced Power Solutions in September 2021, a business unit aimed at commercializing power management technologies derived from the C-2W/Norman fusion reactor. This division targets markets including electric vehicles, charging infrastructure, and energy storage systems. Industry veteran David Roberts leads this initiative.

Underlying theory

Conventional fusion approaches require heating fuel to extremely high temperatures—millions of degrees—to surpass the Coulomb barrier, forming plasma where fusion occurs as energetic particles collide. Achieving sufficient confinement duration for fusion remains a significant obstacle.

TAE’s method employs a plasma configuration known as a field-reversed configuration (FRC), where the plasma forms a closed loop stabilized by self-generated magnetic fields. The plasma current induces a magnetic field perpendicular to the loop, helping maintain its structure.

A critical advancement involves the continuous injection of particle beams along the FRC boundary to sustain rotation, thereby improving stability and overall plasma performance.

TAE's design

The FRC developed by TAE is a self-stabilizing rotating toroid shaped like a thin ring, comparable in shape to an unrolled tin can. Fuel ions are injected tangentially via particle accelerators to maintain and fuel reactions within this ring.

Unlike tokamak devices, FRCs possess reversed axial magnetic fields generated by plasma eddy currents, which mitigate magnetohydrodynamic and other plasma instabilities. This principle forms the foundation of TAE’s C-2 series reactors.

Fuel injection accelerates particles within the toroidal ring to preserve rotation, while electron injection serves to neutralize accumulated charge.

The FRC is housed inside a cylindrical vacuum chamber equipped with solenoids and can be compressed either adiabatically or through the collision of two FRCs.

To initiate fusion, TAE aims for ion temperatures near 3 billion °C (~250 keV) maintained over millisecond timescales, as demonstrated in experiments with C2-U.

TAE’s reactor design is capable of producing fusion power output up to 100 times greater than tokamaks operating at similar magnetic field strengths and plasma volumes.

The ¹¹B(p,α)αα aneutronic reaction

TAE Technologies concentrates on "advanced fuels" such as hydrogen and boron-11 that primarily yield charged particles during fusion. This enables efficient direct energy conversion and results in aneutronic reactions that produce minimal neutron radiation or radioactive waste—setting it apart from deuterium-tritium fusion and conventional nuclear fission. The plentiful availability of these fuels further enhances commercial feasibility.

The primary reaction utilized is the clean ¹¹B(p,α)αα process, which generates three helium nuclei (α-particles), inspiring the company’s name:

¹p + ¹¹B	→		¹²C
¹²C	→		⁴He	+	⁸Be
⁸Be	→	2	⁴He

In this reaction, a proton collides with boron-11, producing an excited carbon-12 nucleus that emits one high-energy α-particle. Subsequently, beryllium-8 decays into two lower-energy α-particles. This reaction mechanism has been recognized since 1987.

Research conducted in 2010 at Duke University—supported by TAE and the U.S. Department of Energy—demonstrated that the reaction releases greater energy than formerly estimated. These studies confirmed an updated model predicting emission of two high-energy α-particles at specific angles, thereby increasing potential energy yield. This advancement underpins TAE’s efforts to develop commercially viable aneutronic fusion reactors offering enhanced energy efficiency and negligible radioactive waste production.

Inverse cyclotron converter (ICC)

Conventional direct energy conversion methods employed in other fusion devices, such as collector plates featuring "Venetian blind" structures or elongated linear microwave cavitys operating under 10-Tesla magnetic fields with rectenna arrays, are inadequate for ion energies exceeding 1 MeV. To address this limitation, the company engineered a compact inverse cyclotron converter (ICC) functioning at 5 MHz within a 0.6 tesla magnetic field. The ICC transforms the linear trajectory of fusion product ions into circular paths via a magnetic cusp, enabling energy extraction from charged particles spiraling past quadrupole electrodes. Traditional collectors are typically limited to processing particles with energies below 1 MeV.

For a 100 MW Field-Reversed Configuration (FRC) reactor, calculations estimating the ratio of fusion power to radiation losses assumed converter efficiencies of 90% for α-particles, 40% for Bremsstrahlung radiation, and 70% for accelerators utilizing 10T superconducting magnets:

Q = 35 in deuterium-tritium fuel
Q = 3 in deuterium-helium-3 fuel
Q = 2.7 in hydrogen-boron-11 fuel
Q = 4.3 in polarized hydrogen-boron-11 fuel

The fusion cross section is enhanced by a factor of 1.6 for ¹¹B when spin polarization is applied. Further improvements in Q may arise from the nuclear quadrupole moment characteristic of ¹¹B and processes that generate secondary high-energy α-particles.

TAE Technologies plans to utilize the p-¹¹B reaction within commercial FRC reactors, motivated by its inherent safety advantages and simplified energy conversion requirements—absence of neutron production eliminates the necessity for thermal cycles involving heat exchangers or steam turbines.

The company’s designs for "truck-sized" 100 MW reactors are founded on these efficiency and conversion projections.

Sewer pipe

In 1998, a demonstration device was developed using an ordinary sewer pipe to validate the formation of a field-reversed magnetic configuration.

CBFR-SPS

The CBFR-SPS represents a 100 MW-class aneutronic fusion rocket concept based on magnetic field-reversed configuration technology and fueled by a mixture of hydrogen and boron (p-¹¹B) ions. Fusion reactions generate helium ions (α-particles) expelled along the axis; those moving in one direction are decelerated to convert energy directly into power, while those ejected oppositely provide propulsion thrust. Since all fusion products are charged particles and no neutrons are emitted, extensive radiation shielding is unnecessary.

C-2

TAE Technologies performed experiments on "C-2," the world’s largest compact toroid device, with findings published consistently since 2010. The C-2 device achieved peak ion temperatures reaching 400 eV (approximately 5 million °C), electron temperatures around 150 eV, plasma densities near 1·10¹⁹ m⁻³, and generated about 1·10⁹ fusion neutrons per second sustained over a duration of 3 milliseconds.

Budker Institute

The Budker Institute of Nuclear Physics in Novosibirsk developed a high-power plasma injector delivered to TAE Technologies’ research facility at the end of 2013. This injector produces a neutral beam with power levels ranging from 5 to 20 MW, which is used to transfer energy into the reactor’s plasma to sustain fusion reactions.

C-2U

In March 2015, the enhanced C-2U, featuring edge-biasing beams, achieved a tenfold increase in plasma duration, successfully heating field-reversed configurations (FRCs) to temperatures of 10 million °C that persisted for 5 milliseconds without degradation. The C-2U functions by accelerating and colliding two toroidal plasmas at speeds reaching 1 million km/h, creating an elongated, cigar-shaped FRC measuring up to 3 meters in length and 40 centimeters in diameter. Control over the plasma was maintained through magnetic fields generated by electrodes and magnets, while an improved particle beam system supplied 10 MW of power.

C-2W/Norman/Norm

In 2017, TAE Technologies renamed the C-2W reactor "Norman" to honor co-founder Norman Rostoker. By mid-2017, Norman had achieved plasma temperatures ranging from 50 million to 70 million °C. After conducting approximately 4,000 experiments, it reached nearly 20 million °C in early 2018. During that year, TAE collaborated with Google's Applied Science team to enhance electron temperature within Norman, with the goal of attaining fusion breakeven. By 2021, Norman consistently maintained stable plasma exceeding 50 million degrees Celsius, which facilitated securing an additional $280 million in funding and increased total investments to $880 million.

In 2023, TAE published a peer-reviewed article documenting the first observation of p-¹¹B fusion within magnetically confined plasma at Japan’s LHD.

By 2025, TAE revealed its Norm reactor design, which is considerably more compact than Norman due to the removal of extended quartz tubes previously installed at each end of the chamber.

Copernicus

The Copernicus reactor was engineered to operate using hydrogen fuel with the objective of achieving net energy gain by 2025. With an anticipated budget of approximately $200 million, this device aimed to reach temperatures near 100 million °C to demonstrate deuterium-tritium fusion viability while transitioning toward p-¹¹B fuel because of its superior environmental impact and cost advantages. Construction was scheduled to commence in 2022.

Da Vinci

Da Vinci is proposed as Copernicus’s successor and serves as a prototype for a commercially viable fusion reactor. Planned for development in the late 2020s, it targets operating temperatures up to 3 billion °C and aims to generate fusion power.