Cooling the magnetic coils to improve performance of the ST40 tokamak

In tokamak experiments that use copper coils for magnets (rather than superconductors), the copper will heat up as current flows through them. Cooling the copper can improve performance by enabling the copper to carry more current and thereby produce higher magnetic fields.

Doug Rose-Innes, Consultant Mechanical Engineer, tells us about the liquid nitrogen system being installed on ST40 to cool the copper coils, discussing why do we need it, why can't we have any liquid nitrogen in the tokamak when firing a shot, and how we control the flow of nitrogen within the system.

Filmed before Covid-19.

Видео Cooling the magnetic coils to improve performance of the ST40 tokamak канала Tokamak Energy