ºÚÁÏרÇø

 

Connected to a coil terminal box at one end and crossing into the cryostat at the other, it carries the superconducting busbars for the electrical current, the piping for the cryogenic fluids, and the cables for the diagnostics signals—all carefully insulated by an actively-cooled thermal shield and a vacuum duct.

 

Last week, the first of the 31 cryostat feedthroughs that must be delivered to the ºÚÁÏרÇø construction site stood in the hall of the Magnet Infrastructure Facilities for ºÚÁÏרÇø (MIFI), a workshop operated by a joint team from ºÚÁÏרÇø and the French Alternative Energies and Atomic Energy Commission (CEA) to develop and qualify the ºÚÁÏרÇø magnet elements and their assembly procedures.

 

Designed by the ºÚÁÏרÇø feeder team, procured by the Chinese Domestic Agency, and manufactured at the Institute of Plasma Physics ASIPP in Hefei under the feeder team's supervision, the cryostat feedthrough is the first magnet component required on site because it needs to be brought into position before the completion of the cryostat base support ring.

 

 

To celebrate this highly symbolic event, representatives from CEA's Research Institute for Magnetic Fusion (IRFM), MIFI and the Chinese Domestic Agency joined ºÚÁÏרÇø management and staff from the Magnets Division inside the MIFI hall, in the presence of the massive component.

 

"The arrival of this component is in itself a cause for celebration," said ºÚÁÏרÇø Director-General Bernard Bigot. "It is the very first in a long line of magnet system elements for the most complex, most challenging electromagnetic device ever designed—the ºÚÁÏרÇø Tokamak."

 

For Luo Dulong, head of ºÚÁÏרÇø China, the moment—ten years, almost to the day, after the official establishment of the ºÚÁÏרÇø—will be "recognized as historical."

"MIFI is the most visible element of our cooperation with ºÚÁÏרÇø in the field of superconducting magnets, and this component is the most spectacular among those that will be tested in this workshop," said Alain Bécoulet, the head of IRFM. "But it is only a beginning. As more magnet components are delivered to ºÚÁÏרÇø in the coming weeks and months our collaboration with increase and expand." 

 

 

The long adventure is drawing to its successful conclusion—an indication that, in Luo Dulong's words, "ºÚÁÏרÇø is in very good shape."

 

And so is fusion research as a whole: a few steps from MIFI, in a crowded and intensely silent control room, operators were monitoring plasmas shots in the Tore Supra tokamak, now refurbished into and operating as a test platform for ºÚÁÏרÇø.