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Dee Installation and Commissioning. Reminder – installation concept (A.Surkov) Some remarks Time estimates Conclusions. Installation Concept A.Surkov – Autumn 2000. 2 EE Dees go to SX5 They are rotated from horizontal into vertical They are bolted together on the “EE Riser”

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dee installation and commissioning
Dee Installation and Commissioning
  • Reminder – installation concept (A.Surkov)
  • Some remarks
  • Time estimates
  • Conclusions

Ken Bell - Rutherford Appleton Laboratory

installation concept a surkov autumn 2000
Installation ConceptA.Surkov – Autumn 2000
  • 2 EE Dees go to SX5
  • They are rotated from horizontal into vertical
  • They are bolted together on the “EE Riser”
  • Test all 7320 channels, using “mobile” test equipment
  • EE Riser and 2 Dees lowered, EE+ traverses to UX5 on air-pads
  • Tower of 4 HF Risers built up in front of HE, carefully positioned
  • Dummy Dees removed. EE Riser and 2 Dees craned on top
  • Adjustments: x, y; rotate about {z,y,x} (hydraulics)
  • Final move in z to HE, insert “dowel pins” & torque the bolts
  • Connect all services at the patch panels
  • Test all 7320 channels through to the counting room
  • If ∼all OK, remove Dee cradles, dismount EE Riser & HE Risers
  • Repeat the procedure at the other endcap
  • Wait for the physics to begin

Ken Bell - Rutherford Appleton Laboratory

some remarks
Some remarks
  • Concept has now evolved to allow single Dee installation, e.g. to allow single Dee repair during a shutdown – Good !
  • The desire for prior surface testing is mine – biased:

a) by bitter personal experience

b) knowing that activation makes subsequent UX5 repairs difficult

  • If EB has found no problems after installation, we might skip this…
  • Debugging/commissioning at a height of 7–11m will not be easy, but other sub-detectors will have already faced & solved this
  • Mount both Dees, then commission.I don’t want HV & 20kW of LV being commissioned on D1 while D2 is being moved nearby…
  • We should not forget SE…
  • Doubling the handling gear would allow greater parallelism between the 2 endcaps, ie would give EE+/– and SE+/– longer to install and commission… Expensive – shift working is cheaper?

Ken Bell - Rutherford Appleton Laboratory

time estimates
Time Estimates
  • EE time estimates for installation – from Justin Greenhalgh
    • First endcap(+): Underground, mounted on HE 5 weeks
    • First endcap(+): Connect, test, debug 4 weeks
    • Second endcap(–): Underground, mounted on HE 4 weeks
    • Second endcap(–): Connect, test, debug 4 weeks
  • Austin’s V33.0 planning allows EE&SE +/– 6 weeks, 6 weeks respectively (but parallelism  both completed in 8 (=2+4+2) weeks)
  • Austin’s V33.1 planning allows EE&SE +/– 8 weeks, 6 weeks respectively (but parallelism  both completed in 10 (=4+4+2) weeks)
  • Ignoring SE, V33.1 ==
    • EE+: 1week Setup, 1w D1, 1w D2, 1w Services, 4w Commission
    • EE–: 0week Setup, 1w D3, 1w D4, 1w Services, 3w Commission
    • These times feel challenging, but acceptable…

Ken Bell - Rutherford Appleton Laboratory

conclusions
Conclusions
  • EE+ needed for installation in 8 weeks starting 22-Dec-06
  • EE– needed for installation in 6 weeks starting 22-Jan-07
  • Need to figure out how to pre-test “everything” beyond the patch panels at the perimeter of the Dees – the only way to reduce the commissioning time
  • No time for Dee dismount/repair, even if serious problems
    • So remove cradles as soon as Dees on HE, and profit from better access and liberating the EE Riser for the other endcap
  • Installing also SE will be “interesting”, eg
    • 1w Setup+, 1w D1, 1w D2, 1w SE+, 1w Services, 3w Commission
    • 1w Setup–, 1w D3, 1w D4, 1w SE–, 1w Services, 1w Commission

Ken Bell - Rutherford Appleton Laboratory

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