Tokamak Energy

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Tokamak Energy, Ltd.
IndustryFusion Power
Founded2009; 14 years ago (2009)
HeadquartersOxford, United Kingdom
Key people
  • Warrick Matthews
    Dr Christopher Martin (Chairman)
Number of employees

Tokamak Energy is a fusion power research company based in the United Kingdom,[1] established in 2009.[2]

The company employs over 200 people and holds over 50 families of patent applications. It has built several versions of tokamaks, in the form of spherical tokamaks, with the final aim of reaching commercial fusion power generation.[3][4] One of the first was the copper-based ST-25; in 2015 this was upgraded with rare earth–barium–copper oxide (REBCO) high temperature superconductors (HTS) to the ST-25HTS.[3] The most recent tokamak developed is the ST-40, which reached 15 million degrees Celsius in 2018.[4][5][6] In March 2022, the same reactor achieved a landmark plasma temperature of 100 million degrees Celsius.[7] Tokamak Energy is a spin-off of the Culham Centre for Fusion Energy based in Oxfordshire.[8] As of April 2021, the company has raised over £117m from private investors including L&G Capital, Dr. Hans-Peter Wild, and David Harding, CEO of Winton Capital.[2] The company aims for energy breakeven in 2025 with the ST-40's successor, the planned ST-F1, and for a commercial grid-connected reactor for 2030 with the ST-E1. Tokamak Energy plans to build compact modular fusion reactors of around 150 MW.[3]

In October 2022, the UKAEA and Tokamak Energy announced a framework agreement for a five-year partnership to collaborate on developing spherical tokamaks, in the UKAEA's case to work towards its STEP machine. The partnership will involve cooperating on diagnostics and remote handling; equipment, facilities, and staff; the fuel cycle; materials development and testing, including HTS; and power generation.[9]

See also[edit]


  1. ^ Energy, Tokamak. "Contact » Tokamak Energy". Retrieved 3 May 2019.
  2. ^ a b "Tokamak Energy on track to be the first private company to achieve 100 million degree plasma temperature, paving the way to commercial fusion energy". Retrieved 3 April 2021.
  3. ^ a b c Windridge, Melanie (2020), "Tokamak Energy", Commercialising Fusion Energy, IOP Publishing, doi:10.1088/978-0-7503-2719-0ch5, ISBN 978-0-7503-2719-0, S2CID 241527511, retrieved 13 December 2021
  4. ^ a b "Tokamak Energy hits 15 million degree fusion milestone". The Engineer. 6 June 2018. Retrieved 3 May 2019.
  5. ^ "Fusion power is attracting private-sector interest". The Economist. 2 May 2019. Retrieved 3 May 2019.
  6. ^ Gryaznevich, M.; Nicolai, A.; Chuyanov, V.; Team, Tokamak Energy Ltd. (2021). "St40 Progress Towards Optimized Neutron Production". Problems of Atomic Science and Technology, Ser. Thermonuclear Fusion. 44 (2): 107–110. doi:10.21517/0202-3822-2021-44-2-107-110. ISSN 0202-3822. S2CID 238914316.
  7. ^ "Tokamak Energy achieves crucial plasma temperature". World Nuclear News. 10 March 2022. Retrieved 12 July 2022.
  8. ^ "ST40 achieves 15-million-degree target - World Nuclear News". Retrieved 3 May 2019.
  9. ^ International, Power Engineering (10 October 2022). "Tokamak Energy and UKAEA team up to drive fusion innovation". Power Engineering International. Retrieved 2 November 2022.

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