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SMACC Sixteenth report [20 min ] 10/01/2014

Detailed report on activities undertaken since the last meeting, including arc splices, sector-specific tasks, inspections, and planned work for the upcoming weeks. Progress, setbacks, and plans clearly outlined for each sector.

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SMACC Sixteenth report [20 min ] 10/01/2014

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  1. Jean-Philippe Tock (TE-MSC) On behalf of the SMACC project SMACC Sixteenth report[20 min]10/01/2014

  2. Activities since last LSC (06/12/2013) • Arc splices installation • By Activities • By sectors • SIT • DFBA • Dashboards • Specials • IFS repair update • Splices in 23 update • S45 He spill test • Dipole diodes (&quad diodes) • Activities for the next 2 weeks • Conclusions

  3. SMACC Main activities for the last 3(5) weeks From last LSC (06.12.2013) All is reclosed but the IC with DFBAK Insulation vacuum leak tested on >3/4 of S56 • Sector 56 : • Final leak test and surface work on DFBAK SHM • Sector 67 : Pressure test planned for 15.01.2014 • Sector 78 (No access in R7 in W51, neither in sector on 6-7.01.2014) • Complete the reconnection of Q5L8 • Final decision on DFBAO repair location • Progress on M leak tests and closure of interconnections • Sector 81 (No access in sector on 6-7.01.2014) • Continue the M linesrewelding • Start M leak tests • Sector 12 • Electricalinsulation • Sector 23 • Unsoldering/Resoldering of splices, • Cu machining • Installation of shunts • Sector 34 • Start Cu machining • Start installation of shunts • Sector 45 • M linesopening  Ready for pressure test next week  Completed  Will be repaired at the surface  90% leak tested, 60% reclosed  2/3 rewelded  > ¼ tested On-going, ≈ 1/2 of the sector done  Completed but few NCs   On-going, > 80% completed  On-going, > 70% completed >25% done   Starting, >10% done  On-going, L5 in priority (He spill test)

  4. SEQUENCE AND STATUS Install DN200 Completed 100 % Completed Completed Open M sleeves Open ICs OK to open > 7.1 sectors 8 sectors 8 sectors Undo / Redo splices ElQC(new splices) Cancelled ≈ 6 sectors Machine Cu ElQCafter Cu mach. ElQC(old splices) ≈6 sectors > 6.5 sectors > 5.8 sectors Consolidate Q diodes Restarted for 3 weeks more ≈ 4 sectors Weld M Leak test M Close IC Final LT Insulate splices ElQCafter shunt Install shunts ≈ 1.7 sector > 5.5 sectors ≈ 4.5 sectors > 5.75 sectors > 2.5 sectors > 3.5 sectors > 3 sectors

  5. SMACC Progress report by activity • Desoldering / Resoldering: Completed in about 6 sectorsequivalent 57 64 • Desoldering in 23 is almost completed • Heavy tooling to transfer around P3 (not a good access) • OK for a restart, time to restart the machines • A bit of margin wrt to Cu machining Courtesy H Prin

  6. Cu machining≈ 6 sect-eq SMACC Progress report by activity 58 Courtesy H Prin / M Dumas

  7. SMACC Progress report by activity • Shunts are installedin ≈ 5.8 sectors-eq (1243 ICs > 70%) • 38 ICs shunted in 4 days (↔≈ 48/week) • Work in sectors 23-34 (No infrastructure at P3) • A few (#7) days ahead of schedule (Mind the last X% effect)

  8. SMACC Progress report by activity • Insulation box: Installed in 4.5 sectorsequivalent • Injected only on Thursday this week : 20 IC (≈ 100/week) due to lack of ecobond (delivered on Wednesday 8.01.2014) • > 100 ICs are ready for injection • Only 5 ICs in 12 are not ready to be injected • Mounting of the boxes is starting in 23 Courtesy H Prin / G Maury

  9. SMACC Progress report by activity • M Welding : ≈ 763 ICswelded, > 3.5 sec-eq: • Machines have been maintained • 81 was not accessible on Monday/Tuesday • Only registered when inspected • 4 leakswerefound end of 2013 (2 in S78 and 2 in S81) • Investigation are on-going (2), requiringdisconnection of main and spool piecesbusbars As presented LSC 4.10.2013 18 weeks @ 51 14 ICS behind forecast 11 weeks @ 34

  10. SMACC Progress report by activity • Quadrupole diodes : On going, for 3 more weeks… • 4 sectors are consolidated (56,67,78 &81) • Delivery from company 2 received and conform • Order to company 3 launched, delivery in February • Not on the immediate critical path for the next weeks, otherwise, fall back solution exists to allow M welding and partial M leak testing • Team worked on dipole diodes in 56 (see later) • Still issues with company 1 Courtesy L Grand-Clement

  11. SMACC Progress report by activity • Reclosure of interconnections : > 2.5 sec equivalentisreclosed • All ICs are reclosed in 56 and in 67 except the DFBAK • Sector 78 was not accessible on Monday/Tuesday • Re-Opened 3 ICs in 56 (dipole diodes)

  12. SMACC Progress report by activity • Final leak test: ≈ 1.7 sec equivalentcompletelyvalidated • 67 is completed • Starting in 78

  13. SMACC Sector 67 • Followed by: • Leak test • ElQA • Flushing • ElQA •  Campaign to fixNCs (leaks, short circuits in diodes) in March 14

  14. SMACC Progress report by sector • Main activities are : • Welding of M lines • Leak test of M lines • Main activities are : • Leak test of M lines • Closure of interconnections • Leak test on insulation vacuum

  15. SMACC Progress report by sector • Main activities are : • Cu machining • Shunt installation • Installation of insulation boxes • Main activities are : • Injection of electrical insulation • Diodes consolidation to start

  16. SMACC Dashboards • Openingiscompleted • Shuntingisslightlyahead on schedule • Confident that the installation of insulation boxes willrecover • Welding rate willincrease, a buffer isavailable • Reclosure: Limited by release rate (and thisweek by access)

  17. SMACC Progress report SIT • SIT • All cryomagnets are reconnected • Team members are partiallyreinforcing the train and the DFBA activities • Intervention on triplet braids to start end of January Courtesy N Bourcey, S Le Naour

  18. DFBA: SMACC Progress report DFBA • Special DFBAs • DFBAK Interlayers leak has finally been localised,  NOT the one to insulation vacuum 10 bellows delivered last week of Dec-13 : 2 are needed per DFBA Leak tested successfully so far Radiographic analysis revealed the presence of porosity/small voids in the welds (acceptable) and of tungsten inclusions (NOT acceptable) Relevant inspection can be carried out at CERN with the required accuracy level Repair procedure of the welds is under definition/validation (EN-MME) •  Identify 4 [2] good units (or repair if needed) •  Impact on the reinstallation of the DFBAK, not (yet) on the S56 schedule • DFBAO Decided to repair it in the surface workshop (same procedure as for DFBAK) • Disconnection is startingTo avoid impacting the global schedule, CSCM has to be cancelled in S78 A Perin / S Atieh / D Lombard

  19. DFBA: SMACC Progress report DFBA Courtesy S Atieh

  20. DFBA: SMACC Progress report DFBA • Standard DFBAs • MSC shunt installation team has been reinforced with 4 additional persons, operational since 10 December. Effect is already visible on broaching/brazing operations. • 62 / 135 splices consolidated, work completed on 4 DFBAs. • Global schedule is being redefined following decision to repair DFBAO in the workshop DFBAA-AB (P1): To beinsulatednextweek, soready for reclosure DFBAC (P2): Pigtailsconsolidated  Progress ishigherthan nominal for standard operations Courtesy A Perin

  21.  Completed  Completed

  22. SMACC Dashboards Baseline: 66.8 % (62.5 %) Completed: 60.3 % (56.6 %) Delay 27 (25) days • Delay stable, Baseline: 62.4 % (55.7 %) Completed: 58.8 % (52.9 %) Delay 9 (9) days  Delay stable • New baseline for DFBA under implementation • Synthetic view is under development • Preliminary forecast done (To be validated) • Impact of bellows W inclusions not included yet • On the critical path, // arcs Preliminary

  23. SMACC Dashboards Progress: Baseline: 64.4% (58.3 %) Completed: 58.4% (53.8 %) Delay16 (15) days Stable ; Δbaseline ≈ Δcompleted

  24. SMACC IFS repair (Last LSC) From last LSC (06.12.2013) • Based on ElQA diagnostics fromoutside • Confirmed • Can befixed in-situ

  25. SMACC IFS repair: Update IFS werereplaced and checked OK Courtesy L Grand-Clement

  26. SMACC Overheated splice repair in 23 In QBBI.B34L3  Validated Seenextpresentation (R Ostojic) Courtesy S Le Naour / A Piguiet

  27. SMACC Sector 45 He Spill test Up to Mid W4: Opening of M lines Removal of electricalinsulation Installation of capture tools PerformElQC of existingsplices W4 (end) : Temporaryrelosure of W-bellows on ≈ 30 Ics Preparation of test W5 : Half of sector (L5) not accessible for AUG tests W6 : He spill test during the nights (Access restrictions)

  28. SMACC Dipole diodes Results from S56 – dipole diode lead R @ RT RHalf-moon < 2 µΩ 308 measurements RHS-BB < 2 µΩ RDiode-HS < 5µΩ Courtesy F Savary

  29. SMACC Dipole diodes : work plan • W51-2013: • Venting of the related vacuum subsectors (VSC) • Establishing cryogenics conditions to allow intervention (CRG) • CW2: • Mo-Tue: Opening of #3 interconnections [W bellows and thermal shields] (MSC-αω) • Wed-Thu: Opening of diode containers and access flange (MSC-Diode team) Then: • Local measurement of the contact resistances (MSC, L. Grand Clement and ElQA) and analysis (on-going) Courtesy F Savary

  30. SMACC Dipole diodes • Dipole diodes current leads willbemeasured in the 8 sectors at warm • Methodwillbe cross checkedwith the outliersidentified in 56 • Duration : ≈ 1 week per sector • Usuallydoneafter 17h • Extra workload for ElQA team • Planned in S81 nextweek • NB: This part of the circuit isalso «checked» by CSCM, presentlyplanned in 2-3 sectors • Tooearlytooconclude; it has to beanalysedwithin the diodes WG (MPE-MSC)

  31. SMACC Quadrupole diodes : on-going cases • @ QBQI.24L1, MQA needs to bereplaced, it has excessive diode to heatsink R: • 19 µΩ (EE025, cathode, heat sink A) • 6 µΩ (EE024, anode, heat sink B) • @ QBQI.8R3, removal to investigate on possible effects of radiations • @ QQBI.7R3, MDA removed to investigate on possible effects of radiations Courtesy F Savary / L Grand-Clement

  32. SMACC Summary on progress Main 13 kA Splices:  Delay stable at 9 days, despite the Christmas break Special Interventions:  Delay stable DFBA:  Good progress on standard consolidation  Special cases (AK/AO) will require extra work  Replacement bellows issue to be followed up SMACC:  About 2.5 weeks Delays are stable Very slightly more than nominal rate achieved these last 15 weeks !

  33. SMACC Main activities for the next 2 weeks • Sector 56 : • Final leak test and surface work on DFBAK SHM • Investigation on dipole diodes • Sector 67 : Pressure test planned for 15.01.2014 • Leak tests, ElQA • Sector 78 • Progress on M leak tests and closure of interconnections • Disconnect DFBAO SHM (Priority to bedefined) • Sector 81 • Complete the M linesrewelding • M leak tests • Sector 12 • Complete electricalinsulation • Progress on quad diodes consolidation • Sector 23 • Cu machining • Installation of shunts • Start electricalinsulation • Sector 34 • Cu machining • Installation of shunts • Sector 45 • M linesopening & ElQC in the zone of He spill test, temporaryreclosure of ICs

  34. Conclusions • Good restart – Accessingwent on smoothly : THANKS • Delays are stable, despite the end of yeareffect • Sector 67 isready for pressure test • Confident that consolidation of splices in the arc canrecover the baseline: Last X % effect… • Tightfollow-up of components for diodes consolidation • Tightfollow-up of standard DFBA splices consolidation • Issues: • Consolidation of specialDFBAs • Repair of NCs in parallelwith production work

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