1. ATLAS closing scenario  Where we are  What is still be done before closing (ADO-PO support)  Closing scenario / Procedure / Schedule Prepared by Michel RAYMOND ADO-PO section meeting March 12th, 2009 March 12th, 2009

2. M. Raymond ADO-PO meeting – March 12 th, 2009 2 Where we are Side ASide C Side A Side C Atlas is in standard opening configuration Nominal gaps are granted except at a very few locations (Tile Extended Barrel) Access exist and are evolving depending on systems requests Most of them complies with expectations (2 sectors not reachable on BEE C side) No particular complain caused by the new layout of the Round scaffolding Current situation should be the baseline for future, including necessary improvements

3. M. Raymond ADO-PO meeting – March 12 th, 2009 33 Just to remind where the ADO-PO operation team is involved What is to be done before closing  EEL muon chambers installation in sector 5  Ring segments modification on JD  Shielding of LVPS on End Cap calorimeters  BOL6A11 and BOL6C15 repairs  Magnet preparation Only the main tasks that have to be done before the closing are mentioned To check all functionalities of the movement system A few improvements are on going (Traction control, Air distribution) Spare components have been ordered but will be partially here only, because of very long delivery time Done On going

4. M. Raymond ADO-PO meeting – March 12 th, 2009 4 Closing scenario : overview It will be the reverse scenario compare to the opening 1.Closing of side A 2.In parallel, fiber replacement on Big Wheels MDT chambers side A + closing of C side Octagonal shielding will be installed for the 1 st time 5 weeks Dismounting of platform Removing of BT Vacuum pump Chamber installation BT vacuum pump back Modification (?) and platforms back

5. M. Raymond ADO-PO meeting – March 12 th, 2009 5 Team activity All Barrel scaffoldings G.Akhperjanian I. Krasin S.Studenov S.Yukhimchuk Magnets P. Benoit M. Jeckel Magnets P. Benoit M. Jeckel BW movement + maintenance R. Vuillermet W. Andreazza C. Leboube V. Durastanti A. Yandyan BW movement + maintenance R. Vuillermet W. Andreazza C. Leboube V. Durastanti A. Yandyan Movement system M. Raymond D. Bertet F. Rosset A. Popov Movement system M. Raymond D. Bertet F. Rosset A. Popov L. Rose-Dulcina Supervision/operations M. Raymond P. Petit Supervision/operations M. Raymond P. Petit Barrel chambers + EE G. Spigo C. Leboube V. Durastanti A. Popov A.Yandyan Barrel chambers + EE G. Spigo C. Leboube V. Durastanti A. Popov A.Yandyan General support (team) General support (team) This is the main idea : detail will be decided according real time activity Follow up – ALARA O.Beltramello F. Pedrosa R. Vuillermet Follow up – ALARA O.Beltramello F. Pedrosa R. Vuillermet

6. M. Raymond ADO-PO meeting – March 12 th, 2009 6 Side ASide C Side A Side C Closing Side A (1) EBA closed 16/04/2009 Scaffoldings removal (JD, EB, then Barrel) Hydraulics connections EBA movement EIL4A11 replacement Air pads + hydraulics JD-A movement Fixed point on VA - Removing of temporary support of VT Installation of JD locking devices 30/03/2009 07/04/2009 JD-A closed09/04/2009

7. M. Raymond ADO-PO meeting – March 12 th, 2009 7 Side ASide C Side A Side C Closing Side A (2) ECT-A closed 22/04/2009 ECT X-brackets removing Hydraulics connections ECT-A movement Support of VT-A AFT locking Hydraulics connection and truck movement Light truck to surface A-frame installation 15/04/2009 17/04/2009 Truck to surface21/04/2009

8. M. Raymond ADO-PO meeting – March 12 th, 2009 8 Side ASide C Side A Side C Closing Side A (3) JFC1 installed 07/05/2009 Lowering of Compressed truck Lowering of JF table Hydraulics connection Lowering of JFC1 JFC1 positioning Beam pipe + Lucid Truck movement + lifting JFC2 installation + survey 23/04/2009 27/04/2009 JFC2 installed06/05/2009

9. M. Raymond ADO-PO meeting – March 12 th, 2009 9 Fiber replacement – SIDE A Installation of JFC3 is delayed to give access to LUCID BW-A opening and decoupling – planned 4 days Tilt + 3 meters movement Columns installation MDT–TGC2 disconnection Load transfer to static columns Movement 1.5 meter toward IP Optical fibers replacement maintenance operations Using 1 lifting platform + 1 basket lifted by the crane Planned 6 days IP face opening Movement of chariot Load transfer Connection TGC2-MDT Movement to IP Disconnection MDT-TGC1 Load transfer Movement 1.5 meter Planned 3 days Optical fibers replacement + maintenance operations Using 1 lifting platform + 1 basket lifted by the crane Planned 6 days BW-A at closed position Closing the wheel Load transfer Connection TGC1-MDT Tilt Planned 1.5 day 07/05/200 9 10/06/2009 15/05/200 9 26/05/200 9 29/05/200 9 09/06/200 9

10. M. Raymond ADO-PO meeting – March 12 th, 2009 10 Side A Side C Closing Side C 06/05/2009 Scaffoldings removal (JD, EB, then Barrel) Hydraulics connections EBC movement Air pads + hydraulics JD-C movement Fixed point on VA - Removing of temporary support of VT Installation of JD locking devices EBC closed19/05/2009 JD-C closed22/05/2005 ECT X-brackets removing Hydraulics connections ECT-C movement Support of VT-C AFT locking Hydraulics connection and truck movement Light truck to surface A-frame installation ECT-C closed28/05/2009 Truck to surface 02/06/2009 25/05/2009 Lowering of Compressed truck Lowering of JF table Hydraulics connection Lowering of JFC1 JFC1 positioning Beam pipe + Lucid Truck movement + lifting JFC2 installation + survey JFC1 installed 08/06/2009 JFC2 installed 11/06/2009 04/06/2009 11/06/2009

11. M. Raymond ADO-PO meeting – March 12 th, 2009 11 Last activities 11/06/2009 24/06/2009 27/07/2009 06/08/2009 Magnetic test 15/07/2009 22/07/2009 EE side A EE side C Octagonal shielding side A Work on VJ beam pipe & LUCID Install JFC3 + plug Rails set up Lower compressed truck + JF table Truck positioning - hydraulic connection Lowering of JFS3 bottom part JFS3 bottom part positioning Air pads removal JFS3 top part installation - TAS survey Octagonal shielding side C Removing of all equipment and material from UX15 Shafts closing Activity in parallel on both sides need a very sharp organization

12. M. Raymond ADO-PO meeting – March 12 th, 2009 12 Improvement foreseen on closing/opening movement Improvements about the procedure close collaboration between Operation team and Safety team Follow up of the procedure and task durations Analysis of the procedure + Go to more details when necessary Add to the procedure the clear information on which material is removed and when Addition in the procedure of RPE intervention. Technical improvements on movement system Air flow panels have been lowered from top of the truck to the floor of the trench To monitor air will need one tech. instead of two Tech. will stand much further from activated area Many components duplicated to save not only time but also handling and access close to activated area Connection between Bcam and movement HMI is being developed will reduce the need of survey and make us more confident during movement

13. M. Raymond ADO-PO meeting – March 12 th, 2009 13 Plans for detectors positioning End Cap calorimeters Overall policy = do the same than during 1 st closing in 2008 Method and tooling is kept unchanged 1.Checking of the distances between Tile fingers and ITC 2.Adjustment of stoppers and electrical switches 3.To perform the movement until stoppers are touching What is our goal : nominal position or “previous run” position ? To be confirmed JD + Small wheels 1.Tilt back the JD to the nominal angle 2.Adjust the new ring segments accordingly Goal : be as close as possible from nominal position End Cap Toroid Big wheels So far, no change in requirements  no change in the procedure Goal : be as close as possible from “previous run” position ? To be confirmed Measurement done on C side after fibers replacement shows no relative movement between wheels. Last positioning will be reproduced Shielding Goal : place the various parts as they were, Final survey needed (for magnetic reason)