LMC 1 (Pre Chamonix) DN200 relief valve position DN200 relief valve position On top wherever possible. Open W bellows for MLI protection. On top wherever possible. Open W bellows for MLI protection. Elsewhere (few special cases) install at -55 degrees Elsewhere (few special cases) install at -55 degrees Later changed to installation at 50 degrees (February 18) Later changed to installation at 50 degrees (February 18) Sector 12 magnet with 100nΩ resistance - opened Sector 12 magnet with 100nΩ resistance - opened No or very little solder on one half-moon splice No or very little solder on one half-moon splice Sector 67 magnet with 50nΩ resistance Sector 67 magnet with 50nΩ resistance Decided to remove (January 28) – will be cycled in SM18 Decided to remove (January 28) – will be cycled in SM18 Reminder of sector warm up or otherwise Reminder of sector warm up or otherwise warm for dipoles exchange 12 warm for dipoles exchange 67 warm for dipole exchange 67 warm for dipole exchange 56 warm for connecting cryostat repair 56 warm for connecting cryostat repair 23 and 45 empty of helium for transport, held at < 100K 23 and 45 empty of helium for transport, held at < 100K 78 and 81 remain full of helium 78 and 81 remain full of helium

Chamonix 2009 Monday 02 to Friday 06 February 2009 Chamonix Majestic Session 01 - What did we learn without beam in 2008 Session 02 - Safety Session 03 - Repair of 34 Session 04 - Strategy for consolidation to avoid incident and limit collateral damage Session 05 - Shutdown Modifications 2008/9 and Future shutdowns Session 06 - What else can go wrong Session 07 - What did we learn with beam in 2008? Session 08 - What we will do for beam preparation in 2009 Session 09 - What will we do with beam in 2009/10 Session 10 - Summary session Tuesday 18 February 2009 CERN main auditorium Session summaries

Magnet cold testing and measurements Magnet cold testing going well, about on schedule (OP in SM18) Magnet cold testing going well, about on schedule (OP in SM18) Last magnet to go down mid-April Last magnet to go down mid-April No dedicated resistance measurements during the series tests No dedicated resistance measurements during the series tests Measurement methods investigated end of 2008 Measurement methods investigated end of 2008 Data taken during series tests identified Data taken during series tests identified Resistance can be derived from this but only with 15nΩ resolution Resistance can be derived from this but only with 15nΩ resolution Thorough analysis of SM18 data will be done (PH will help) Thorough analysis of SM18 data will be done (PH will help) New setup defined to meet requirements of 1nΩ New setup defined to meet requirements of 1nΩ 6 magnets had been blocked during the recent SM18 tests 6 magnets had been blocked during the recent SM18 tests 4 had been approved after measurements/re-analysis 4 had been approved after measurements/re-analysis MB2420 not accepted, rather opened MB2420 not accepted, rather opened MB 3383 not accepted, rather retested MB 3383 not accepted, rather retested

Sector 34 repair Surface Surface Cold testing going OK Cold testing going OK Beam screen installation the present focus Beam screen installation the present focus Underground Underground D area D area 18 of 53 magnets underground 18 of 53 magnets underground Alignment (with smoothing) required contiguous magnets Alignment (with smoothing) required contiguous magnets So little done So little done Interconnection work running late Interconnection work running late New planning will be needed New planning will be needed Outside D area Outside D area Welding not started (should have happened in January) Welding not started (should have happened in January) Will be knock-on effects Will be knock-on effects Vacuum cleaning ongoing Vacuum cleaning ongoing

Water cooled cables Chlorine in the reinforcement layer (affects 66% of all) Chlorine in the reinforcement layer (affects 66% of all) Cracks (affects 22% of all, some overlap with above) Cracks (affects 22% of all, some overlap with above) Result is that only about 25% are OK (no chlorine, no cracks) Result is that only about 25% are OK (no chlorine, no cracks) All need changing (3 to 4 year campaign) All need changing (3 to 4 year campaign) 3 new cable types tested, best chosen, cables arriving 3 new cable types tested, best chosen, cables arriving Start with worst cables (around points 6 and 4) Start with worst cables (around points 6 and 4) Exchange not easy and could impact on overall planning Exchange not easy and could impact on overall planning Start at point 4 Start at point 4 Change 22 cables Change 22 cables Intervene also at point 6 Intervene also at point 6 During transport at point 4 During transport at point 4 Change 3 cables Change 3 cables

QPS upgrade Large scope Large scope Splice detection AND symmetric quench detection Splice detection AND symmetric quench detection 5500 new printer circuit boards 5500 new printer circuit boards 230km of cable 230km of cable Project Project Detailed planning in place Detailed planning in place Several work packages outsourced (BE-OP, TE-EPC) Several work packages outsourced (BE-OP, TE-EPC) Deadline for completion end of August Deadline for completion end of August External review recommendations External review recommendations UPS upgrade needed to provide redundancy UPS upgrade needed to provide redundancy Cabling the main issue Cabling the main issue Optimisation of use of radiation-hard cable Optimisation of use of radiation-hard cable Interference with magnet transport Interference with magnet transport Planning foresees done by end June Planning foresees done by end June

Undulator L4 Employs 8 coils in series Employs 8 coils in series Each has an energy extraction resistor in parallel Each has an energy extraction resistor in parallel One of them is broken/disconnected on device L4 One of them is broken/disconnected on device L4 3 options 3 options Use undulator as it is Use undulator as it is Add an external resistor to change the response in case of quench Add an external resistor to change the response in case of quench Replace the magnet with the spare Replace the magnet with the spare Since in any case the undulators will eventually need a modification to circumvent an issue with ramping times, for now solution 2 Since in any case the undulators will eventually need a modification to circumvent an issue with ramping times, for now solution 2

Stand alone magnets and inner triplets Relief valves will be fitted according to needs Relief valves will be fitted according to needs IT 24 or maybe 48 if MLI ‘plugging’ serious enough IT 24 or maybe 48 if MLI ‘plugging’ serious enough SAM24 SAM24 Semi SAM21 Semi SAM21 DFBM23 DFBM23 DFBL4 DFBL4 DFBAto be finalised DFBAto be finalised So over 100 relief valves on these elements So over 100 relief valves on these elements PiMs PiMs No failures in LSS seen so far No failures in LSS seen so far The non-conformity at the root of general problem not (as) relevant The non-conformity at the root of general problem not (as) relevant Will not be systematically changed Will not be systematically changed Inspect whenever possible Inspect whenever possible

Running in winter Cryogenic plants Cryogenic plants Start beam operation with single cryoplants at 6 and 8 Start beam operation with single cryoplants at 6 and 8 Check the situation under these conditions Check the situation under these conditions At points 2 and 4 the margins are less, so keep double At points 2 and 4 the margins are less, so keep double Keep all active for Hardware Commissioning Keep all active for Hardware Commissioning Electrical costs Electrical costs Increased compared to LPT due to three factors Increased compared to LPT due to three factors Change in LTP itself Change in LTP itself 8% increase in energy prices 8% increase in energy prices Winter rates Winter rates Total increase is around 13MEuros Total increase is around 13MEuros Winter running contributes about 8MEuros to this (with reduced cryo) Winter running contributes about 8MEuros to this (with reduced cryo) Other aspects to be looked at Other aspects to be looked at

Planning as of February 25

Commissioning schedule (as of March 03)