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Atlas Muon Spectrometer: installation and commissioning

Atlas Muon Spectrometer: installation and commissioning. L. Pontecorvo INFN Roma. Outlook. Installation Status and perspectives Chambers Commissioning Surface Test Pit Test Cosmic runs in Sector 13 Set-up Few results from MDTs Future data taking during Thoroid Test.

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Atlas Muon Spectrometer: installation and commissioning

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  1. Atlas Muon Spectrometer: installation and commissioning L. Pontecorvo INFN Roma

  2. Outlook • Installation Status and perspectives • Chambers Commissioning • Surface Test • Pit Test • Cosmic runs in Sector 13 • Set-up • Few results from MDTs • Future data taking during Thoroid Test L. Pontecorvo INFN Roma

  3. Barrel Installation Status • 66% of the Barrel chambers have been installed • Even Sectors completed except for 11 BIS chambers • BMS installation : completed 84 chambs • BOS installation : completed 102 chambs • BIS installation: still 11 chambers to go (sect 12 and 14 side A) 117 chambs • Odd Sectors: • BOL Installation : 67 chambs • Side C still 2 chambers on sect 13 to be installed • Side A: Sects 1, 9, 11, 15 + 3 chambs in 13, to be installed • Still missing in total 2 on side C AND 27 on side A • BML installation : 17 chambs • Sector 5: 9 chambers (1-3 C and side A completed) installed • Sector 13: 6 chambers (1-3 A and C) installed • Still missing 41 on side C and 38 on side A • BIL installation : 43chambs • Sector 13: 9 chambers (1-3 A and side C completed ) • Sector 5: 12 chambsers completed • Sector 3: 12 chambers • Sector 9: 2 chamber • Sector 1 : 6 chambers side C completed+2 side A • Still missing 34 on side C and 43 on side A Total of installed chambers :430/656+ 3 EIL4 Installation rate in last months: about 3.5 /day L. Pontecorvo INFN Roma

  4. BIL-BML status • BIL: • All Side C BIL will be installed by the end of this week • Side C BIM-BIR (24 chambers) will be installed in 2007 when the TGC wheel will be moved to give back access to Barrel installation • All Side A BIL-BIM-BIR will be installed by the end of 2006. • BML: • On Side C we will install the last sectors (11, 15 and part of 1 and 9) in 2007 after removing the TGC wheel • All side A will be installed by the end of 2006 L. Pontecorvo INFN Roma

  5. 5 4 6 3 7 2 8 US USA 1 9 16 10 Blue not installed Red installed Violet : partly installed 11 15 14 12 13 Barrel Side C: Now Not all the chambers are in final position L. Pontecorvo INFN Roma

  6. Barrel Side A: Now 5 4 6 3 7 2 8 US USA 1 9 16 10 Blue not installed Red installed Violet Partly installed 11 15 14 12 13 L. Pontecorvo INFN Roma

  7. 5 4 6 3 7 2 8 US USA 1 9 16 10 Blue not installed Red installed Violet partly installed 11 15 14 12 13 Barrel Side C: Beg. Oct Side C installation is stopped when moving the TGC big wheel towards Barrel C L. Pontecorvo INFN Roma

  8. 5 4 6 3 7 2 8 US USA 1 9 16 10 Blue not installed Red installed Violet partly installed 11 15 14 12 13 Side A: End of 2006 End of the installation: Dec 2006, from our present installation rate Few chambers (about 40-50) still to be installed on side C after removing TGC big wheel: Only BML and BIL Editare dati L. Pontecorvo INFN Roma

  9. Manpower for Installation • Chamber installation is a TC duty • 2 teams of CERN technicians take care of inserting chambers in the spectrometer. • Muon Community takes care of: • Final chamber positioning • Connections and cabling of all the available services • Chambers testing • Large participation of all the Muon collaboration: • Dubna, MPI/LMU, NIKHEF, NTUA/Thessaloniki, INFN. • L.Pontecorvo (INFN Roma) and F. Cerutti(INFN-LNF) coordinate all the installation and commissioning activities L. Pontecorvo INFN Roma

  10. Service Installation • Service installation and routing is responsibility of TC • Large cabling Team is now becoming available and is starting to work on: • HV, LV, Control Cables, Alignment cables, Read-out Fibers • Gas Piping (from Rack to Manifold and valves) • A. Lanza (INFN PV) is the coordinator of this activities • Muon Collaboration is responsible for providing cables and for final connections to the chambers including gas piping (lengthy operation) • Chamber testing and commissioning can be done only after connection to final services will be completed L. Pontecorvo INFN Roma

  11. Bundles installed and connected Installed Installed Bundles installed and not connected Partly installed Patch-cords installed Installed Under installation Patch-cords installed and not connected Length to be evaluated Service installation status: MDT • MDT HV-LV cables installed for all outer chambers • Production and installation under way • MDT Alignment cables Installed for most of the chambers • MDT DCS daisy chains cable produced for most of the chambers and installed on upper sectors (2,4,5,6) • MDT RO/TTC fibers: Installed on most of the upper sectors but not yet connected to chambers • Gas connections Chambers to Manifold started in many sectors (BOL, BOS, BIL, BIS) L. Pontecorvo INFN Roma

  12. Service installation status: RPC • RPC services less advanced than MDT • HV cables installed only in sector 13, other sectors in production • RPC LV and DCS in production only for sector 13 • LVL1 LV cables installed in sector 13 and in production for other sectors • LVL1 RO and Timing fibers installed on most of the sectors, patch cords installed only in sector 13. • Hpt-Lpt cables installed on most of the sectors • LVL1 CAN-cables installed (daisy chain to be produced) • Gas connections to manifold well advanced. L. Pontecorvo INFN Roma

  13. Power system status • MDT: • Most of the crates, branch controllers and AC/DC generators are delivered or under delivery • Preseries of the LV distributors is delivered and used in sector 13. • First series delivery will take place in October 2006 • Preseries of HV distributors is delivered and used in sector 13.. • First delivery is foreseen in March 2007 • RPC and LVL1: • Noise problem discovered when using the prototype version of the HV distributor A3512. The problem is under investigation • First delivery of some LV/HV modules is expected before the end of 2006 • REMINDER: delivery schedule will be agreed on 25 Sept. taking into account all the requests (ATLAS, CMS, etc.) L. Pontecorvo INFN Roma

  14. Chamber commissioning • Muon stations are tested before and after installation • SURFACE TEST. • Check of the functionality of the detectors prior to the installation, to find any problem occurred during transport/storage and components added just before installation • PIT TEST. • Check of the functionality of the detectors, of the services and of the correctness of the cabling after installation L. Pontecorvo INFN Roma

  15. Surface test station • Test sequence MDT: • Leak : measure MDT pressure before and after transport. • HV (2000V): check for broken wires and high currents. • LV test: check for LV shorts • DCS and alignment test: check for disconnected/not working sensors. • Noise and Test Pulse Run : check of the full Read-out chain • Test Sequence RPC: • Install and cable the Trigger PADS • Leak: check the gas tightness of the RPC gaps • Test of the Electronics noise: read-out the Pool Down Current • Test Pulse run: check full read-out chain and cabling. • About 450 chambers have been tested up to now • Many small problems solved on the spot • About 4% of chambers have been sent back to certification phase L. Pontecorvo INFN Roma

  16. Partial tests (HV and Pressure) Complete test (no noise runs) Pit Testing • Up to now only very basic test have been performed both on MDT and RPC : HV and leak tightness • Now the possibility of more refined test is approaching due to the installation of final services. • MDT • Gas tightness after connection to gas manifolds • DCS tests and JTAG initializations • Functionality of the alignment sensors • Noise tests • RPC • RPC gas tightness • RPC pull-down currents L. Pontecorvo INFN Roma

  17. DCS PCs and Power crates AlignmentPCs MDT DCS and Alignment • All DCS computers Installed in USA15 • CANbus Power crates installed • Read-out of DCS chains in many sectors is performed with final system. • All Alignment Computer Installed in USA15 • Many sectors cabled and tested with final system • First 4 projective alignment lines read-out in sector 13 • P. Valente (INFN-Roma) is the new MDT DCS coordinator L. Pontecorvo INFN Roma

  18. Cosmic Ray Test: Sector 13 L. Pontecorvo INFN Roma

  19. Sector 13 : Set up Experimental setup: • 3 BML and 3 BOL installed and temporarily cabled • HV-LV from CAEN pre-series • Temporary gas systems used for both RPC and MDT • Scintillator trigger installed • DAQ • DAQ system based on ATLAS RCD (Coordinator E. Pasqualucci INFN Roma) • Test of the final MDT MRODX • Test of final LVL1 Sector Logic • Trigger : • RPC LVL1 trigger: 40 Hz(Coordinator S. Veneziano INFN Roma) • Scintillator trigger: <1 Hz • Stable combined runs (RPC + MDT + CTP with RPC trigger) • Trigger distributed to Tile calorimeter via CTP, combined runs Muon+Tile L. Pontecorvo INFN Roma

  20. Hits per event Large shaft Hits per track Track angle Small shaft Sector 13: First MDT results • Typical MDT spectrum: • Time Spectrum shape as expected • Low noise out of the trigger window. • Hits per event: • Large peak close to 12 hits as expected • Very clean hits/track distribution • Reconstructed track angle: • Cosmic muons points mainly to the large shaft on side A. L. Pontecorvo INFN Roma

  21. Sector 13: MDT-RPC correlation • Very good Correlation between RPC Z measurement (h strips) and MDT Z measurement (tube number). • Correlation is kept all along the run: • no desyncronization during the run. MDT Z measurement RPC Z measurement Difference Zrpc-Zmdt vs event Event number L. Pontecorvo INFN Roma

  22. Goals for thoroid test • Experimental set up: 3 BIL-BML-BOL+3BOF/BOG • B-field measurement : extensive use of MDT DCS • Alignment : • Measurement of toroid displacements with reference system • Commissioning of first projective lines • Alignment with tracks vs alignment system (BOL-BOF) • MDT: • Detailed NOISE studies: dependence on Itor, Threshold, RPC running conditions, grounding schemes • Running parameter optimization • Detailed studies of calibrations (r(t), t0, …) vs B-field • RPC/LVL1: • First running parameter optimization • Verify trigger efficiencies vs Pt of cosmics L. Pontecorvo INFN Roma

  23. Conclusions • 66% of the barrel chambers have been installed • End side A by Dec 2006 • End side C (BML-BIM/BIR chambers) by Feb 2007 • First TGC big wheel installed • Services installation on-going : end by November • Chamber commissioning starting with inner layer chambers • Power system: first deliveries of LV boards during Oct, HV boards by March 2007 • Sector 13 as a benchmark of the phase II commissioning: good results from cosmic ray combined runs with MDT-RPC-LVL1-CTP and Tile Calorimeter. L. Pontecorvo INFN Roma

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