Welcome to the ATLAS Overview Week in Stockholm

1. Welcome to the ATLAS Overview Week in Stockholm - A few words introducing ATLAS to our hosts - The new LHC schedule - Financial status - Implementation of the Operation Model and goals of the ATLAS Week ATLAS Plenary

2. Thank you for the friendly welcome to Stockholm ! Professor Kare Bremer Stockholm University, Vice-Chancellor Professor Anders Flodstroem KTH Stockholm, President Professor Arne Johansson Swedish Research Council, Secretary General Natural and Engineering Sciences … but of course also already now to Kerstin Jon-And and Bengt Lund-Jensen for all the careful preparations for the meeting! ATLAS Plenary

3. ATLAS Collaboration (As of the March 2006) 35 Countries 158 Institutions 1650 Scientific Authors total (1300 with a PhD, for M&O share) New application for CB decision in July DESY, Humboldt U Berlin (Germany) SLAC, New York U (US) Albany, Alberta, NIKHEF Amsterdam, Ankara, LAPP Annecy, Argonne NL, Arizona, UT Arlington, Athens, NTU Athens, Baku, IFAE Barcelona, Belgrade, Bergen, Berkeley LBL and UC, Bern, Birmingham, Bologna, Bonn, Boston, Brandeis, Bratislava/SAS Kosice, Brookhaven NL, Buenos Aires, Bucharest, Cambridge, Carleton, Casablanca/Rabat, CERN, Chinese Cluster, Chicago, Clermont-Ferrand, Columbia, NBI Copenhagen, Cosenza, AGH UST Cracow, IFJ PAN Cracow, Dortmund, TU Dresden, JINR Dubna, Duke, Frascati, Freiburg, Geneva, Genoa, Giessen, Glasgow, LPSC Grenoble, Technion Haifa, Hampton, Harvard, Heidelberg, Hiroshima, Hiroshima IT, Indiana, Innsbruck, Iowa SU, Irvine UC, Istanbul Bogazici, KEK, Kobe, Kyoto, Kyoto UE, Lancaster, UN La Plata, Lecce, Lisbon LIP, Liverpool, Ljubljana, QMW London, RHBNC London, UC London, Lund, UA Madrid, Mainz, Manchester, Mannheim, CPPM Marseille, Massachusetts, MIT, Melbourne, Michigan, Michigan SU, Milano, Minsk NAS, Minsk NCPHEP, Montreal, McGill Montreal, FIAN Moscow, ITEP Moscow, MEPhI Moscow, MSU Moscow, Munich LMU, MPI Munich, Nagasaki IAS, Naples, Naruto UE, New Mexico, Nijmegen, BINP Novosibirsk, Ohio SU, Okayama, Oklahoma, Oklahoma SU, Oregon, LAL Orsay, Osaka, Oslo, Oxford, Paris VI and VII, Pavia, Pennsylvania, Pisa, Pittsburgh, CAS Prague, CU Prague, TU Prague, IHEP Protvino, Ritsumeikan, UFRJ Rio de Janeiro, Rochester, Rome I, Rome II, Rome III, Rutherford Appleton Laboratory, DAPNIA Saclay, Santa Cruz UC, Sheffield, Shinshu, Siegen, Simon Fraser Burnaby, Southern Methodist Dallas, NPI Petersburg, Stockholm U, KTH Stockholm, Stony Brook, Sydney, AS Taipei, Tbilisi, Tel Aviv, Thessaloniki, Tokyo ICEPP, Tokyo MU, Toronto, TRIUMF, Tsukuba, Tufts, Udine, Uppsala, Urbana UI, Valencia, UBC Vancouver, Victoria, Washington, Weizmann Rehovot, Wisconsin, Wuppertal, Yale, Yerevan ATLAS Plenary

4. The ATLAS detector ATLAS superimposed to the 5 floors of building 40 Diameter 25 m Barrel toroid length 26 m End-cap end-wall chamber span 46 m Overall weight 7000 Tons ATLAS Plenary

5. The underground cavern at point-1 for the ATLAS Detector Length = 55 m Width = 32 m Height = 35 m ATLAS Plenary

6. An aerial view of point-1 (Across the street from the CERN main entrance) ATLAS Plenary

7. The ATLAS detector being installed now in the underground cavern ATLAS Plenary

8. Simulation of a H   ee event in ATLAS ATLAS Plenary

9. The impressive progress on the construction, installation, and commissioning of the detector, as well as on the preparation for the data collection, the distributed analysis and the physics, will be covered over this week As the details we will be presented all ‘first hand’ by those doing actually the work, there is no point for me to cover any of this now… Integration work on one of the two SCT end-caps ATLAS Plenary

10. News from the LHC machine ATLAS Plenary

11. New LHC machine schedule A new LHC schedule and turn-on strategy was presented to the CERN SPC and Council three weeks ago The experiments were informed only shortly before, and allowed to communicate it just after the SPC meeting The main features of the new schedule are: - The beam pipe closure date will be end of August 2007 (instead of end of June 2007) - After that there will still be a few weeks of controlled access to the cavern - This is followed by an LHC commissioning run with collisions at the injection energy (450 + 450 GeV), until the end of 2007 - Then there will be a shut-down (typically 3 months) during which the remaining machine sectors will be commissioned without beam to full energy (7 TeV) - After that the LHC will be brought into operation for the first physics run at 14 TeV, with the aim to integrate substantial luminosity by the end of 2008 The LHC Machine Advisory Committee (MAC) has strongly endorsed this new start-up strategy as the most efficient way to reach 14 TeV collisions The SPC stressed that the goal should be several fb-1 integrated luminosity at the end of 2008 ATLAS Plenary

12. (Presented by CERN to SPC and Council) Milestones for the machine LHC commissioning - Sectors 7-8 and 8-1 will be fully commissioned up to 7 TeV in 2006-2007. If we continue to commission the other sectors up to 7 TeV, we will not get circulating beam in 2007. - The other sectors will be commissioned up to the field needed for de-Gaussing. - Initial operation will be at 900 GeV (CM) with a static machine (no ramp, no squeeze) to debug machine and detectors. - Full commissioning up to 7 TeV will be done in the winter 2008 shutdown ATLAS Plenary

13. ATLAS Plenary

14. Installation activities in a sector QRL installation QRL consolidation after pressure test Cryo-magnet transport Interconnection phase 1 LSS installation End of 1st interconnect activity Pressure test Cryostat closure – Interconnect consolidation Insulation // Interconnect phase 1 Beam pipes & bake-out ELQA at warm Cool-down Power tests Machine check-out Beam at 450 GeV/C ATLAS Plenary

15. ATLAS Plenary

16. (Presented last week by J Engelen at the Cracow Physics at LHC conference) CERN management’s conclusion • We now have enough information to produce a consolidated plan for commissioning. • Three quarters of the machine has been liberated for magnet installation and interconnect work is proceeding in 2 octants in parallel. Magnet installation is now steady at 25/wk . Installation will finish March 2007. The machine will be closed in August 2007. • Every effort is being made to establish colliding beams before the end of 2007 at reduced energy. The full commissioning up to 7 TeV will be done during the 2008 winter shutdown ready for a Physics run at full energy in spring 2008. ATLAS Plenary

17. W  e Z  ee Given this new schedule situation, ATLAS stated that the start-up strategy should be such that the useful integrated luminosity at 14 TeV at the end of 2008 will be maximized This points towards preferring a few weeks of stable running conditions at the injection energy as compared to possibly lengthy attempts to reach the maximum possible beam energy of 1.1 TeV before the full commissioning of LHC power components in the winter shut-down Primarily the run in 2007 will be a detector and computing commissioning run, much more than a physics run (Data taking efficiency (machine x detector) of 30% included Efficiency of all analysis cuts included) s = 900 GeV, L =1029 cm-2 s-1 ATLAS Plenary

18. Overall financial situation (more details in the CB) Main financial framework (a simplified summary) ATLAS construction budget initial MoU 1995 475 MCHF updated baseline contributions 468 MCHF Cost-to-Completion (CtC) evaluation 68 MCHF (in addition to deliverables, accepted by the RRB in October 2002 based on the Completion Plan) Main funding issues today There are remaining outstanding contributions to the baseline & Common Fund 9 MCHF Not all the calculated CtC shares have been pledged, in fact the situation only looks quite good because CERN has committed 5 MCHF more than its calculated share The following table shows the details ATLAS Plenary

19. Status of the Cost to Completion funding (CERN-RRB-2006-027) ATLAS Plenary

20. Updated Cost to Completion estimates The RRB was warned in the April 2006 meeting that the ATLAS management is re-evaluating the financial situation and evolution since the CtC estimates accepted in October 2002 The situation as we understand it now is that there are new overcosts projected at the level of 4.4 MCHF for the completion, over the 68 MCHF estimated in 2002 Further delays in installation work beyond August 2007 would require additional resources for manpower to be paid (order 200 – 400 kCHF per month) The following table has been made by the CB Audit Group (see C Oram’s CB presentation) Largely due to the engineering contracts Not initially part of TCn Workforce not available from CERN and Institutes ATLAS Plenary

21. Note that these overcosts could still be absorbed within the initial completion plan provided that all FAs would provide the full calculated share of the initial CtC funds, given the extra contribution provided by CERN Alternative funding schemes have been discussed with the CB Audit Group, and will be discussed in the CB meeting Restoration of the full TDR detector The RRB has been reminded regularly that for the standard LHC design-luminosity the ATLAS detector will have to be restored to its approved TDR configuration At the time of the establishment of the Completion Plan (October 2002), this was estimated to be in the 20 MCHF range (usual CORE material accounting) The ATLAS management will have to examine and coordinate plans for reaching the full detector in the coming months; we are also requested to give first indications about this at the next RRB ATLAS Plenary

22. Remaining is also the cash flow problem… (see M Nordberg’s regular presentations for details) ATLAS Plenary

23. CB Publication Committee, Speaker Committee ATLAS management: SP, Deputy SP, RC, TC Collaboration Management, experiment execution, strategy, publications, resources, upgrades, etc. TMB Executive Board Physics (Physics Coordinator) optimization of algorithms for physics objects, physics channels Detector Operation (Run Coordinator) Detector operation during data taking, online data quality, … Data Preparation (Data Preparation Coordinator) Offline data quality, first reconstruction of physics objects, calibration, alignment (e.g. with Zll data) Computing (Computing Coordinator) Core Software, operation of offline computing, … Trigger (Trigger Coordinator) Trigger data quality, performance, menu tables, new triggers, .. (Sub)-systems: Responsible for operation and calibration of their sub-detector and for sub-system specific software Figure 2 During this ATLAS Week it will become evident that the ‘Operation Model’ is being implemented in a gradual and pragmatic way (Details can be found at http://uimon.cern.ch/twiki//bin/view/Main/OperationModel ) ATLAS Plenary

24. Steps on the way to the gradual implementation of the Operation Model (OM) Setting up of the five activity areas: Detector operation Will evolve from the present commissioning organization which is well functional and growing Trigger Will evolve from the present TDAQ system and physics-related trigger activities, and the TDAQ management changes underway anticipate the reorganization Computing Basically existing, OM adaptations being implemented Data Preparation Is being set up now, will regroup many present activities Physics Basically existing, OM adaptations being implemented An important step was the introduction of explicit combined Trigger and Physics Weeks driving this central activity for preparing the data taking era Both the cosmic ray running, gradually starting at Point-1, and the forthcoming large-scale ‘Calibration Data Challenge’ simulations can be seen as important ‘shake-down’ actions for the OM implementation We have also initiated a major effort (OTSMOU Working Group) to define the fair sharing of all operation tasks between all the Institutions, and to review the M&O sharing for the running phase This will include a definition of obligations for new Institutions joining ATLAS in this new phase ATLAS Plenary

25. Recalling the Goals of the Overview Weeks: Main goals in very general terms Get a global view of where we stand in all aspects in the preparations for our experiment Recall that global aspects concern us all, and that we need to care about much more than just the areas of our own activities  This OW should make us particularly aware of the ongoing transition from construction to operation The major focal points are clear - Completion of the construction - Assembly, integration and commissioning of the detector components - Computing and software - Trigger and physics preparation - Installation - Commissioning - In general: preparation of the operation phase Last, but not least, enjoy a stimulating and motivating time together ATLAS Plenary