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What we need

Partial Disassembly of the alignment devices on each ME11transfer plate, ME1/1 chamber and ME1/2 chamber. (6 on +Z and 6 on –Z side of the CMS). What we need. Cherry picker with free access to ALL of the IP side of YE±1 This means both far and near sides

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What we need

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  1. Partial Disassembly of the alignment deviceson each ME11transfer plate, ME1/1 chamberand ME1/2 chamber.(6 on +Z and 6 on –Z side of the CMS)

  2. What we need • Cherry picker with free access to ALL of the IP side of YE±1 • This means both far and near sides • About 2h35’ per point (6 points per endcap) • About 5h20’ for just one point (see ahead)

  3. MAB LEGEND: ASPD 2D Sensor DISTANCEMETER Z DISTANCEMETER R LASER AR LASER LD LASER MAB COLLIMATOR / LASER SOURCE ME/1/3 BARREL YE/1 ME/1/2 Magnet Coil TP HB YN1 EB YN1 ME/1/1 RP HE EE TK LP LB LD AR

  4. Location of link sensors on ME±1/(1,2) DCOPS In ME1/3 8 14 2 20 32 26

  5. The *only* ME±1/2 CSCs that need to be removed in YE±1 are • ME+1/2/11 • ME+1/2/10 and ME+1/2/12 must also come off • ME+1/2/15 • ME+1/2/14 and ME+1/2/16 must also come off • Link has sensors on ME+1/2/14 • Apart from this, ONLY ME11 parts from link alignment need to be removed • In the following, the steps in blue are needed only at this particular point

  6. Disassembly Steps (per point) • Access with the cherry picker to the position, 20’. • Open the cover of the ME11transfer plate Patch Panel, four M4 slotted countersunk (flat) head screws, 10’. • Unplug two Radial ASPDs cables, and one Radial proximity cables, 15’. • Open two covers of the ME11 transfer plate, five M4 slotted countersunk (flat) head screws each, 10’. (Open only one cover for the ME11 operation, 5’) • Unplug Z and RPhi proximity sensor cables and temperature sensor cables of the transfer plate, 20’. • Unplugthetwo ME1/2 ASPDs cables, and un-route cables on ME1/2. 25’. • Disassembly ME1/2 chamberASPDs. Two M6 slottedscrews and twopins. 20’. • Disassembly ME1/1 Z and RPhi proximity sensor and temperature piece of the transfer plate, two allen M5 screws + two pin holes, 20’. • Unplug R proximity sensor cable of the ME1/1 chamber, 10’. • Disassembly ME1/1 chamber device, two allen M6 screws + two pin holes, 25’. • Disassembly the radial piece of the ME1/1 transfer plate, two allen M5 screws + two pin holes. Back access very complicated due to a lot of cables/tubes running around. 1h30’. • Closethecovers of the ME1/1 transfer plate and thePatch Panel and sealingallremainingdevices in thisarea. 35’ (For the ME1/1 operation only, 30’) • Descendwiththecherrypicker. 10’ • Total 5h20’ per point (only one such point in LS1) • For just ME1/1 stuff: 2h35’ (6 such points per endcap)

  7. Open the cover of the ME1/1transfer plate PP, four M4 slotted countersunk (flat) head screws, 10’.

  8. Open two covers of the ME1/1 transfer plate, five M4 slotted countersunk (flat) head screws each, 10’.

  9. Disassembly ME1/2 chamber ASPDs. Two M6 slotted screws and two pins. 20’.

  10. Disassembly ME1/1 Z and RPhi proximity sensor and temperature piece of the transfer plate, two allen M5 screws + two pin holes, 20’.

  11. Disassembly ME1/1 chamber device, two allen M6 screws + two pins holes, 25’.

  12. Disassembly the radial piece of the ME1/1 transfer plate, two allen M5 screws + two pin holes, 1h30’.

  13. The access to the back side of the ME1/1transfer plate it is not easy…

  14. Assembly Steps • Access with the cherry picker to the position, 20’. • Open the covers of the ME1/1 transfer plate and the Patch Panel and the sealing. Five M4 slotted countersunk (flat) head screws each, 15’. • Assemble the radial piece of the ME1/1 transfer plate, two allen M5 screws + two pin holes. Back access very complicated due to a lot of cables/tubes running around. 2h15’. • Assemble ME1/1 chamber device, two allen M6 screws + two pin holes, 35’. • Plug R proximity sensor cable of the ME1/1 chamber, 15’. • Assemble ME1/1 Z and RPhi proximity sensor and temperature piece of the transfer plate, two allen M5 screws + two pin holes, 25’. • Plug Z and RPhi proximity sensor cables and temperature sensor cables of the transfer plate, 25’. • Assemble ME1/2 chamber ASPDs. Two M6 slotted screws and two pins. 30’. • Plug the two ME1/2 ASPDs cables, and re-route cables on ME1/2. 35’. • Close two covers of the ME1/1 transfer plate, five M4 slotted countersunk (flat) head screws each,15’. • Plug two Radial ASPDs cables, and one Radial proximity cable, 20’. • Close the cover of the ME1/1 transfer plate PP, four M4 slotted countersunk (flat) head screws, 15’. • Seal all devices in this area until the start of the next LHC running. 25’ • Descend with the cherry picker. 10’ • Total 7H00’

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