Tokamak Energy exceeds target of 20 tesla with HTS MagnetsOur news
4 September 2019

Tokamak Energy exceeds target of 20 tesla with HTS Magnets

The last 12 months have seen very rapid developments in magnet technology at Tokamak Energy.  The HTS programme of developing tokamak magnets from high temperature superconducting (HTS) materials runs alongside our ST40 programme and is an integral part of our plan to deliver commercial fusion energy.

On 3rd September 2019 at the 14th European Conference on Applied Superconductivity (EUCAS) conference in Glasgow, our Director of Technology Development, Rob Slade, announced that Tokamak Energy magnet engineers have succeeded in producing a magnetic field of 24.4 T in magnets made of high temperature superconducting material.

The magnet is wound from REBCO (Rare earth – Barium – Copper Oxide) HTS tape.  This conduction-cooled all-REBCO magnet achieved its peak field at 21K in a cold bore of 50 mm, which we believe to be record performance.  In superconducting terms, 21K is a relatively high temperature.  Additionally, the magnet is extremely robust, reliable and simple to manufacture.  The engineers have been impressed by the defect tolerance of the coils and their response to a sudden loss of superconductivity, called a quench.

The achievement is an important milestone on the route to commercial fusion energy because high magnetic fields are necessary for tokamak machines to trap the hot fusion fuel, which is in the form of an electrically-charged gas called plasma.  High temperature superconducting materials will facilitate the higher magnetic fields necessary for efficient commercial fusion reactors.

The progress of the HTS team has been faster than expected with milestones being hit well ahead of schedule (this milestone was scheduled for late 2020).  The next step is to scale up these magnets into the configuration required for tokamaks.

HTS magnet Demo 3

This HTS magnet has achieved record magnetic field of 24.4 T at a temperature of 21K

Summary:

  • achieved peak field on coil 24.4 T
  • magnets extremely robust, reliable and simple to manufacture
  • HTS programme is well ahead of schedule
  • HTS magnets generating high fields will be important in a commercial tokamak device producing fusion energy

Watch the video HTS progress announcement – 20T magnet for more information on the team’s achievement from Greg Brittles, Senior HTS Magnet Engineer.

Greg Brittles with the innovative HTS magnets

Greg Brittles with the innovative HTS magnets



Other news and press

ABC national radio ‘future tense’ podcast on fusion Press
30 March 2020

ABC national radio ‘future tense’ podcast on fusion

Listen to our Vice Chairman and co-founder, David Kingham, on the Future Tense podcast for…

+ Learn more
Billionaires Chasing Fusion Energy Face a Credibility Test Press
19 March 2020

Billionaires Chasing Fusion Energy Face a Credibility Test

Extract from article in Bloomberg Green: Tokamak Energy sees fewer credible technologies than ...

+ Learn more
Pioneering fusion energy company Tokamak Energy opens new offices Press
12 March 2020

Pioneering fusion energy company Tokamak Energy opens new offices

A PIONEERING Milton Park fusion energy company invited Wantage MP David Johnston to open its…

+ Learn more
MP David Johnston opens new Tokamak Energy office Our news
10 March 2020

MP David Johnston opens new Tokamak Energy office

The MP for Wantage, David Johnston opened Tokamak Energy’s new office in Didcot on Friday…

+ Learn more