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Rev Sci Instrum. 2011 Oct;82(10):105106. doi: 10.1063/1.3652978.

Development of the heat treatment system for the 40 T hybrid magnet superconducting outsert.

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  • 1High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.


The heat treatment of Nb(3)Sn coil with the glass fabric insulation is one of the key and critical processes for the outsert solenoids of the 40 T hybrid magnet, which could be wound with cable-in-conduit conductors using the insulation-wind-and-react technique. The manufacturing of the large vertical type vacuum/Ar atmosphere-protection heat treatment system has been completed and recently installed in the High Magnetic Filed Laboratory, Chinese Academy of Sciences. The heat treatment system composed mainly the furnace, the purging gas supply system, the control system, the gas impurities monitoring system, and so on. At present, the regulation and testing of the heat treatment system has been successfully finished, and all of technical parameters meet or exceed specifications.

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