Large Hadron Collider at CERN - University of Edinburgh

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The culprit: a bus-bar joint 24’000 bus-bar joints in the LHC main circuits. 10’000 joints are at the interconnection between magnets.They are welded in the tunnel.Nominal jointresistance:• 1.6 K• 300K300pΩ~10µΩFor the LHC to operate safely at a certain energy, there is alimit to the maximum value of the joint resistance.17.03.2010 Status of the LHC - Steve Playfer 10
2008/9 - LHC repair andconsolidation14 quadrupolemagnets replaced39 dipole magnetsreplaced204 electrical interconnectionsrepairedOver 4km of vacuumbeam tube cleanedNew longitudinal restrainingsystem for 50 quadrupoles17.03.2010Almost 900 new helium 6500 new detectors and 250km cablespressure release ports for new Quench Protection System toprotect from busbar quenches11Status of the LHC - Steve Playfer
Page 1 and 2: Large Hadron Collider at CERNSteve
Page 3 and 4: LHC vital statistics• Will eventu
Page 5 and 6: Today all themagnets are coldCool-d
Page 7 and 8: LHC Operation• Proton beams are i
Page 9: The incident on 19/10/08• During
Page 13 and 14: (Ambitious) goal : each experiment
Page 15 and 16: ATLAS17.03.2010 Status of the LHC -
Page 17 and 18: CMS17.03.2010 Status of the LHC - S
Page 19 and 20: LHCbMuondetectorsCalorimeterParticl
Page 21 and 22: First Physics ResultsALICEEPJC 65:1
Page 23 and 24: CMS First ResultsC.Roland (Moriond
Page 25 and 26: Long Term LHC Schedule• Big shutd

Large Hadron Collider at CERN - University of Edinburgh

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