First Plasma In New Reactor Brings The UK a Big Step Closer To Fusion Energy



The UK’s newest fusion reactor has been turned on for the first time and has officially achieved first plasma. The reactor aims to produce a record-breaking plasma temperature of 100 million degrees for a privately-funded venture. This is seven times hotter than the centre of the Sun and the temperature necessary for controlled fusion.

The tokamak reactor, entitled the ‘ST40’, was built by Tokamak Energy, one of the world’s leading private fusion energy ventures. The Oxfordshire-based company grew out of the Culham Centre for Fusion Energy and was established in 2009 to design and develop small fusion reactors. Tokamak Energy’s aim is to put fusion power into the grid by 2030.

With the ST40 up and running, the next steps are to complete the commissioning and installation of the full set of magnetic coils which are crucial to reaching the temperatures required for fusion. This will allow the ST40 to a produce plasma temperature of 15 million degrees – as hot as the centre of the Sun – in Autumn 2017.


Tokamak Energy’s journey to generating fusion energy is moving at a rapid pace; the company has already reached the half-way point of its plan to deliver fusion power. It is focused on working with a smaller reactor design – called a compact, spherical tokamak – that enables quicker development of devices.

Therefore speeding up the process towards achieving their ultimate targets: producing first electricity by 2025 and commercially viable fusion power by 2030. Tokamak Energy’s research has also proven that this route to fusion power can be much faster than the development of conventional large-scale tokamak devices.