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News & Media

Latest ITER Newsline

  • Manufacturing | Completion of the first vacuum vessel gravity support

    The factory acceptance test on the first ITER vacuum vessel gravity support has been successfully completed at Haneul Engineering in Gunsan, Korea. Under the 8, [...]

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  • Technology | Hail showers in ASDEX Upgrade for ITER disruption mitigation

    Just before the 2021 Christmas holiday break, the team at the ASDEX Upgrade tokamak successfully fired frozen deuterium pellet fragments into a plasma as part o [...]

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  • Image of the week | Like a Meccano under the Christmas tree

    Like Erector set or Meccano parts scattered beneath the tree on Christmas morning, components for the ITER Tokamak cover the floor of the Assembly Hall, waiting [...]

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  • Poloidal field coils | 12 months saved on number two

    Whatever their size or position, the role of the ITER poloidal field coils is to shape and stabilize the plasma inside the vacuum vessel. However, as the plasma [...]

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  • Divertor dome | Russia delivers a full-scale prototype

    A multiyear qualification program in Russia has concluded with the successful manufacturing and testing of a full-scale divertor dome prototype at the Efremov I [...]

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Of Interest

See archived entries

Image of the week

Adjusting a correction coil's position

Compared to the massive ITER magnets that weigh up to 400 tonnes, the machine's correction coils are quite lightweight: at 4.5 tonnes, they are the smallest of the superconducting magnetic system. Distributed around the machine in three sets of six (top, bottom and side), they are tasked with reducing the minute deviations of the magnetic field caused by imperfections in the position and geometry of the toroidal and poloidal field coils. Based on a build-to-print design developed by the ITER Organization, they are the procurement responsibility of the Chinese Domestic Agency and its contractor ASIPP (Institute of Plasma Physics, Chinese Academy of Sciences).

Workers from the CNPE Consortium are seen here carrying out metrology measurements and adjusting the kidney-shaped coil's position on its yellow temporary supports. (Click to view larger version...)
Workers from the CNPE Consortium are seen here carrying out metrology measurements and adjusting the kidney-shaped coil's position on its yellow temporary supports.
The first bottom correction coil (BCC/4) was installed in the assembly pit on 21 October 2021, followed five days later by BCC/5. The correction coils must be precisely positioned in a very restricted space between poloidal field coils #5 and #6, lower magnet feeders, and staging platforms. Depending on the coil, the "room to move" is in the range of 15 to 25 mm.

Facing similar constraints, a third kidney-shaped bottom correction coil (BCC/6) was successfully installed on 5 January. Workers from the CNPE Consortium (Tokamak assembly contractor TAC/1) are seen here carrying out metrology measurements and adjusting the coil's position on its yellow temporary supports (final positioning will be possible only when all vacuum vessel modules are in place). A fourth bottom correction coil (BCC/3) is scheduled for installation this week, while the full set of six should be in place by the end of February.

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