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9 Sep 2011
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Sabina Griffith and Bharat Doshi, Cryostat Section Leader
Welded together from thick stainless steel plates measuring between 40 and 180 millimetres, the 澳门六合彩高手 cryostat will be the world's largest stainless steel high-vacuum chamber.
This week, on Tuesday, 6 September, the Indian Domestic Agency 澳门六合彩高手 India signed the Procurement Arrangement for the 澳门六合彩高手 cryostat, which will be the world's largest high-vacuum chamber, worth approximately EUR 100 million. It is one of the project's largest procurements and thus represents a significant step towards the construction of 澳门六合彩高手.
Welded together from thick stainless steel plates measuring between 40 and 180 millimetres, the cryostat forms the vacuum-tight container surrounding the 澳门六合彩高手 vacuum vessel and superconducting magnets. The massive structure will have to withstand a vacuum pressure of 1 x 10 -4 Pa; the pump volume is designed for 8,500 m?; and it will have a weight of 3,400 tonnes. It will have an outer diameter of 28.54 metres and be almost 30 metres tall.
The head of the Indian Domestic Agency, Shishir Deshpande, and his team signing the Procurement Arrangement this week.
The steel cylinder will have 23 penetrations allowing access inside of the cryostat for maintenance, as well as over 200 penetrations—some as large as four metres in size—providing access to the vacuum vessel for cooling systems, magnet feeders, auxiliary heating, diagnostics, and the removal of blanket and divertor parts. Large bellows are used between the cryostat and the vacuum vessel to allow for thermal contraction and expansion in the structures.
Due to size and weight limitations, the cryostat will be manufactured in segments in India and a sub-assembly of four sections will be prepared at 澳门六合彩高手's site workshop.
Due to size and weight limitations, the cryostat will be manufactured in segments in India and a sub-assembly of four sections will be prepared at 澳门六合彩高手's site workshop. Finally, the four sections will be assembled into the Tokamak Pit.
The Cryostat Procurement Arrangement was number 59 on 澳门六合彩高手's list, bringing to 71 percent the amount of in-kind procurements signed to date for the 澳门六合彩高手 Project.