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NCSX Vacuum Vessel Assembly |
The 25,000–pound NCSX vacuum vessel resembles a twisted doughnut. It is made of Inconel 625, an alloy that is hard to form, but has high electrical resistivity that will suppress electrical currents that might interfere with plasma confinement. The vessel has been press formed with 0.375–inch walls and has an overall profile tolerance of ± 0.188 inch. It is being fabricated in three identical segments, which will be welded together end-to-end at PPPL during final assembly. The vessel will contain 90 ports that will provide plasma heating and diagnostic access. |
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