The assembly of the more than a million single parts of the ITER tokamak requires large-scale three-dimensional precision metrology. John Villanueva Jr gives us insights into the complexity of this project.
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Villanueva, J. Metrology on a grand scale. Nat. Phys. 16, 1080 (2020). https://doi.org/10.1038/s41567-020-01059-1