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JT-60SA: full energization of toroidal field magnets
The 18 toroidal field magnets of the JT-60SA tokamak in Japan are now fully energized at a current of 25.7kA. Reaching the full design magnetic field for this coil set is another step of the commissioning activities underway on this collaborative project, financed and executed jointly by Europe and Japan.
Each of the 18 coils is 7.5 metres high and 4.5 metres wide; together they weigh 370 tonnes. They produce a magnetic field running around the torus that has a strength of 2.25T at the centre of its cross section. This field is fundamental to confining the superheated plasma of the tokamak.
The successful generation of the toroidal field demonstrates the simultaneous operation of numerous tokamak systems, in particular the cryoplant, cryodistribution, the cryostat, the thermal shields, power supply, instrumentation, and central control. The commissioning phase will culminate with first plasma later this year.
At the Korea Institute of Fusion Energy (KFE), the KSTAR tokamak recommenced operations in December after a major upgrade to replace the…
KSTAR aims for longer plasmas
At the Korea Institute of Fusion Energy (KFE), the KSTAR tokamak recommenced operations in December after a major upgrade to replace the device's carbon divertor with a tungsten divertor.
According to an on the KFE website, the original carbon divertors could take a thermal load of 5MW/m², whereas the tungsten divertor can take 10MW/m². The upgrade is critical to the goal of sustaining a 100-million-degree plasma for 300 seconds by 2026. Data from the operational campaign will be directly relevant to °ÄÃÅÁùºÏ²Ê¸ßÊÖ, which will operate a tungsten divertor under similar plasma conditions in terms of shape and structure.
This testing campaign will continue through February 2024. Read more about the plans in this in English on the KFE website, or in Korean in the .