About TE Magnetics
TE Magnetics is the high temperature superconducting (HTS) technology business of Tokamak Energy, a leading fusion energy and superconducting technology company based in the UK, with subsidiaries in the U.S. and Japan.
Born from our fusion mission, we have developed world-leading HTS technology – adaptable, scalable, robust, quench-safe, and cost-effective – along with exceptional scientific, engineering and commercial expertise.
In collaboration with key manufacturing partners, our aim is to become the leading supplier of HTS technology for industrial applications.
More than ten years’ experience
Over $60 million invested
A team of over 70 people
In excess of 50 HTS inventions
More than 200 granted patents
Over 5,000 m2 facilities space
Our services
We work with industry partners to deliver high-quality HTS products that achieve significant gains in performance and efficiency for critical applications. With a flexible, collaborative approach, we offer everything from design and prototyping to full magnet system development—building partnerships that drive innovation and high-performance solutions.
- Advanced design, modelling and simulation
- Bespoke coil optimisation tools
- Specialised prototyping & testing facilities
- Production and manufacturing
- Cryogenics and thermal management
- Instrumentation and control systems
- Programme management
Our track record
2025
Demo4 fusion magnet system
World’s first HTS magnet system to achieve fusion-relevant magnetic fields
2021
Quench-safe technology
Robust, scalable, quench-protected HTS magnet technology developed, precisely validating our simulations
2019
World record 24T magnet
World-record 24 Tesla field achieved at a conduction cooled 20 Kelvin with patented HTS technology
2016
HTS lab opened
HTS magnets laboratory opened in Oxfordshire headquarters
2015
Record HTS tokamak pulse
First HTS tokamak sustained pulse for >24 hours with our own ST25-HTS tokamak
2011
First HTS tokamak coil
First HTS coil made and installed on a fusion device (tokamak)
Demo4
Demo4 is a world-first fusion magnet system and a major breakthrough for HTS technology. It shows how a complete HTS magnet system performs in real-world conditions, proving our HTS technology and capability in design, manufacturing, integration, and operations. Alongside Demo4, we’ve built a state-of-the-art facility for testing and operating advanced HTS systems.
Demo4 comprises 44 HTS coils arranged into 14 toroidal field limbs and two poloidal field coils, forming a fusion tokamak structure. In 2025, Demo4 achieved 11.8 Tesla at 30 Kelvin, delivering 7 million amps through the centre column. A successful quench test at 77 K validated our patented quench-safe technology. Through Demo4 we’ve developed the technologies and expertise needed to scale to energy-producing fusion devices and commercial HTS magnet and power distribution systems.
Our partnerships
Collaboration and partnership will be vital to achieving our mission. We have built a strong network of government, commercial, scientific and academic partners which significantly strengthens our capability to commercialise HTS magnets.

General Atomics
We’ve signed a memorandum of understanding with US-headquartered General Atomics (GA) to collaborate in HTS technology for fusion energy and other industry applications, leveraging GA’s world-leading capabilities for manufacturing large-scale magnet systems and Tokamak Energy’s pioneering expertise in HTS magnet technologies.

Furukawa Electric Group
We have a partnership agreement with Furukawa Electric Group, a leading global supplier, for the provision of specialist HTS tape. Building relationships like this with major global companies significantly strengthens our capability to commercialise our HTS magnet technology.

Sandia National Laboratories (SNL)
We are working with the scientists at SNL to conduct in-situ tests of HTS tapes in near-operation conditions under photon radiation, at the SNL Gamma Irradiation Facility. This allows us to test HTS magnet durability and performance when exposed to gamma radiation as we scale up our operations towards commercial fusion.
















