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The first long shutdown (LS1) of the LHC machine at CERN started in February 2013. The main trigger for LS1 was the consolidation of the bus bar joints in the 13-kA superconducting magnet circuits. Before LS1, the copper continuity of these joints was not sufficiently good to ensure a safe passage of the current in case of a quench in the superconducting cable at currents larger than 7–8 kA. The consolidation...
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