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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 • Reminder – installation concept (A.Surkov) • Some remarks • Time estimates • Conclusions Ken Bell - Rutherford Appleton Laboratory
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 • 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 • 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 • 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
