Results of the first JT-60 SA toroidal field coils tests in the cold test facility

•The 5 first JT-60SA TF coils have been successfully tested at 5K and 25.7kA.•One major insulation problem was detected, analyzed and repaired.•Cooling down problems like clogging and temperature gradient were solved.•The inter pancakes joint resistances are below the 2nΩ specified value.•The quench...

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