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News & Media

Latest ITER Newsline

  • Thermal shield repair | Where are we at?

    Fitting the vacuum vessel sectors like a jacket, lining the inner wall of the cryostat, or covering the sides of vertical coil gravity supports, ITER's thermal [...]

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  • Assembly prep | Reviewing plans for in-vessel installation

    A thorough review of all 'in-vessel' assembly scope was organized by the ITER Machine Assembly Program in early February, with the active participation of senio [...]

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  • Image of the week | Last measurements before campaign

    In order to precisely identify the bevel regions that need to be rectified, metrologists from the SIMANN (SIMIC-Ansaldo) consortium are performing ultra-precise [...]

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  • Neutral Beam Test Facility | After upgrades, SPIDER testbed set to restart

    After a two-year shutdown for upgrades, the SPIDER testbed at the ITER Neutral Beam Test Facility in Padua, Italy, is preparing for commissioning and operation. [...]

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  • ITER Research Plan | Jointly preparing a new blueprint

    As part of work underway to update the ITER Project Baseline, a group of experts nominated by the Members met in February to evaluate the new blueprint for achi [...]

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Of Interest

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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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