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The CMS Silicon Strip Tracker Project

GR June 2000. The CMS Silicon Strip Tracker Project. Tracker PRR-01. Scope of the Track_PRR-01 (1). 1) Present the general scheme of the CMS Tracker, including the read out scheme, putting the silicon sensors in perspective.

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The CMS Silicon Strip Tracker Project

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  1. GR June 2000 The CMS Silicon Strip Tracker Project Tracker PRR-01

  2. Scope of the Track_PRR-01 (1) 1) Present the general scheme of the CMS Tracker, including the read out scheme, putting the silicon sensors in perspective. 2) Present in detail the silicon sensors and electronics modules for which approval is sought. The transition to the bulk procurement shall be particularly addressed. 3) Present the specifications and the manufacturing plan of the silicon sensors including Quality Plan and Control procedures. Scheduling, organization, integration and material safety questions related to the silicon sensor project shall be addressed. GR TRAK_PRR-01 June 2000

  3. Scope of the Track_PRR-01(2) Overview of the project layout, organization and schedule: GR mechanics and cooling : HP readout scheme : GH Silicon sensor: definition and specification : MM quality control & assurance : GMB Detector : module design : BG FE Hybrid : JDB FE electronics : GH module assembly : EF GR TRAK_PRR-01 June 2000

  4. Goal of the Track_PRR-01 Approve the procurement of sensors to equip 200 detectors of the SST of final design. These detectors will be used to start up the production chain before the production. They will be equipped with final FE electronics and will be used for system tests to validate the read-out chain before the massive procurement of the FE electronics. GR TRAK_PRR-01 June 2000

  5. Layout of the talk • Requirements and design considerations 3 • Layout 4 • Performance 5 • Mechanical Structures 4 • Collaboration and budget 4 • Structure of the project 3 • Organization of the project 4 • Construction of detectors 4 • Schedule 5 • Conclusions 2 GR TRAK_PRR-01 June 2000

  6. Requirements CMS Technical proposal “The design goal of the central tracking system is to reconstruct isolated high pt tracks with an efficiency of better than 95% and high pt tracks within jets with an efficiency better than 90%..” “The momentum resolution required for isolated charged leptons in the central rapidity region is Dpt/pt = 0.1 pt (pt in TeV)..” This momentum resolution allows to reconstruct Z m+m- with Dmz < 2 GeV up to Pz ~ 500 GeV GR TRAK_PRR-01 June 2000

  7. F SST Design Considerations (1) Twelve layers with digital (pitch/12) spatial resolution give a momentum resolution of in the available radial space. Occ = F x pitch x length Low (1%) occupancy requires maximum strip length of 10cm at 20 cm radius. This requirement is relaxed at the outer radii. Primary charged particle densities integrating 20 minimum bias events GR TRAK_PRR-01 June 2000

  8. Design considerations (2) • Fast detector response (< 25 ns) to reduce pile-up effect • Capability to cope with the CMS trigger requirements • Resistance to high radiation dose • Minimize the amount of material before the calorimeters GR TRAK_PRR-01 June 2000

  9. Layout (1) The CMS SST is made with silicon detectors of two different thickness: 320 mm in the inner region (r< 600 mm) and 500 mm in the outer region. These are single side detectors made of one (thin) or two (thick) daisy-chained silicon sensors from 6” wafers. They are read out with APV25 in deep sub-micron technology. There are 128 channels/APV. Blue lines indicate “double” layers where two detectors are mounted back-to-back. The second detector is mounted with a stereo angle of 0.1. GR TRAK_PRR-01 June 2000

  10. Layout (2) N of points in the SST: Total, double, double inner, double outer. Strip length ranges from 10cm in the inner layers to 20 cm in the outer layers. Pitch ranges from 80mm in the inner layers to 200mm in the outer layers GR TRAK_PRR-01 June 2000

  11. Layout (3) Tracker Numbers 6,136 Thin wafers 19,632 Thick wafers 6,136 Thin detectors (1 sensor) 9,816 Thick detectors (2 sensors) 3112 + 1512 Thin modules (ss +ds) 4776 + 2520 Thick modules (ss +ds) 10,016,768 strips  electronics channels 78,256 APV chips 26,000,000 Bonds 470 m2 of silicon wafers 223 m2 of silicon sensors (175 m2 + 48 m2) GR TRAK_PRR-01 June 2000

  12. Layout (4) IB1 and IB2 can also be made with 2 sensors from 4” wafer GR TRAK_PRR-01 June 2000

  13. Performance (1) Radiation length of the SST as a function of rapidity. Material outside the tracker volume not included Present layout Layout used in the full simulation GR TRAK_PRR-01 June 2000

  14. Performance(2) Present Layout Layout used in the full simulation The present layout has one extra point in the region 1<<2 GR TRAK_PRR-01 June 2000

  15. Performance (3) Momentum resolution 10% at 1 Tev MS up to 30 GeV Sagitta at 1 TeV  180 mm GR TRAK_PRR-01 June 2000

  16. Performance (4) Occupancy GR TRAK_PRR-01 June 2000

  17. Performance(5) Efficiency Efficiency(%) in jets:  < 0.7 1.2<<1.6 ghost fraction(%) pt>2 Gev/c At least 6 reg.hits 93.7 +/- 0.6 91.6 +/- 0.6 0.26 +/- 0.09 0.10 +/- 0.07 At least 8 reg.hits 88.3 +/- 0.9 86.8 +/- 0.8 0.06 +/- 0.06 0.10+/-0.07 main loss due to interaction of particle in the tracker material GR TRAK_PRR-01 June 2000

  18. Outer barrel structure GR TRAK_PRR-01 June 2000

  19. Inner barrel structure GR TRAK_PRR-01 June 2000

  20. Forward Endcap structure GR TRAK_PRR-01 June 2000

  21. Forward Endcap Structure GR TRAK_PRR-01 June 2000

  22. Status of the project • We have finished the R&D phase and we are now moving to the construction phase using all the experience gained in the last years: • The layout has been defined and frozen • The sensor specifications are ready and we are now preparing the Tender • The drawings of the masks are being prepared • The drawings of the detectors are being prepared • The FE electronics has been designed, prototypes have been successfully tested and we have submitted the last engineering run • The mechanical structures are being designed after the definition of the layout GR TRAK_PRR-01 June 2000

  23. THE SST Collaboration * = C.E. Consortium * Vienna * Brussels UVB, Brussels ULB, Antwerpen, Louvain, Mons Helsinki, Oulu * Mulhouse, Lyon, Strasbourg * Aachen I, Aachen III, Karlsruhe Bari, Catania, Firenze, Padova, Perugia, Pisa, Torino * ETH Zurich Brunel, Imperial College, Rutherford Fermilab, Kansas, Purdue, Rochester, Northwestern CERN GR TRAK_PRR-01 June 2000

  24. SST Cost (1) Cost of the SST (deliverable): 69.1 MCHF including 10% contingency (pixel detector excluded) Revised by LHCC in May/00 Funds presently available 62.2 MCHF. USA has a contribution of 2.5 M$ in labor. GR TRAK_PRR-01 June 2000

  25. SST cost (2) More than 40% of the cost is in the modules. About 75% of the cost of the modules is the cost of the sensors. GR TRAK_PRR-01 June 2000

  26. Sharing of construction responsibilities GR TRAK_PRR-01 June 2000

  27. EDMS structure of the Tracker project GR TRAK_PRR-01 June 2000

  28. Example: Forward Endcap PBS GR TRAK_PRR-01 June 2000

  29. Example: Forward Endcap WBS GR TRAK_PRR-01 June 2000

  30. Organization (1) • Management • Tracker steering committee. Weekly meeting (VC) with minutes and action list • 4 Tracker weeks and 4 CMS weeks in the year with Plenary, Institution board, Finance Board meetings. • Technical • Tracker Project Office • Working groups on: Sensor, Gantry, Bonding, Frames, Hybrids, Test of detectors, Electronics system GR TRAK_PRR-01 June 2000

  31. Organization (2)Tracker steering committee Rino Castaldi, Project Manager (chair) Gigi Rolandi, deputy project manager Ariella Cattai, Technical Coordinator Marcello Mannelli, Resource manager Geoff Hall, Electronics Roland Horisberger, Pixel vertex detector Demetrios Pandoulas, CE consortium Jean Marie Brom, CE consortium Ettore Focardi, INFN Guido Tonelli, INFN Joe Incandela, USA Patrice Siegrist, Cern GR TRAK_PRR-01 June 2000

  32. Organization (3)Tracker Project Office Technical Coordinator: P. Siegrist --> A. Cattai Planning Officer H. J. Simonis Safety officer M. Huhtinen CDD EDMS coordinator P. Petagna Tracker Engineer H. Postema Subproject coordinators…. Still to be restructured after the redefinition of the Tracker Project in December 1999 GR TRAK_PRR-01 June 2000

  33. Organization(4)Working groups • Sensor G.M. Bilei http://home.cern.ch/~angarano/sensors/main.html • Gantry G. Fiore • http://home.cern.ch/~fiore/gantry/gantry.html • Bonding A. Honma • http://honma.home.cern.ch/honma/BondingWG/bondhome.html • Frames C. Vandervelde • http://web.iihe.ac.be/frames/ • Hybrids U. Goerlach • Test of detectors E. Focardi http://cmsdoc.cern.ch/~efocardi/moduletest/welcome.html • Electronics system G. Hall • http://pcvlsi5.cern.ch:80/CMSTControl/ • http://www.cern.ch/CERN/Divisions/ECP/CME/OpticalLinks/ gantry sensors bonding frame hybrid GR TRAK_PRR-01 June 2000

  34. Construction of detectors (1) We will construct 17,500 detectors (10% spares included) in 2.5 years. This corresponds to an average capacity of 35 detectors/day There are 6 centers with robot assembly and 12 centers with fast bonding machines Assuming 6 detectors/h mounted on the robot and 2 detectors/h bonded we have a capacity to mount 288 detectors/day to bond 192 detectors/day GR TRAK_PRR-01 June 2000

  35. Construction of detectors(2) Robot mounting Pilot Project (Cern): Reproducibility 2 mm Throughput: 8 modules/h Working group responsibility to ensure common: hardware, calibration, methods Bari : G. Fiore Catania: C. Tuve’ Brussels: L.Van Lancker Lyon: S. Tissot Padova: A. Kaminsky Perugia: M. Biasini USA: L. Spiegel GR TRAK_PRR-01 June 2000

  36. Construction of detectors(3)Bonding More than 14 bonding machines in the Institutes of the Collaboration. Available typically 80-100% for CMS Tracker during the production period with trained manpower. Throughput already achieved in other projects between 5 and 25 detectors/day. Working group responsibility to ensure common: methods and tests. Aachen: Wolfgang Braunschweig Bari: Paolo Tempesta CERN: Alan Honma Fermilab: Joel Goldstein Florence: Enrico Scarlini Karlruhe: Frank Roederer Padova: Igor Stavitski Pisa: Filippo Bosi Strasbourg: Francois Didierjean Torino: Barbara Pini Vienna: Rudolf Wedenig Zurich: Klaus Freudenreich GR TRAK_PRR-01 June 2000

  37. Construction of detectors(4)Burn in of detectors Detectors are mounted on pre-cabled mechanical structures before burn in: Outer barrel rods (300+388) with (12, 6) detectors Done in Fermilab Petals (144 + 144) with (<=28 , <=23 ) detectors 50 petals each in: Aachen, Karlsruhe, Lyon, Strasbourg/Mouluse, Brussels/Antwerp, Louvain The inner structures are smaller and then somewhat less modular: Inner Endcap disks (6) with 136 detectors Half shells (4+4+4+4) with ( 168, 228, 138, 168) Done by INFN GR TRAK_PRR-01 June 2000

  38. Schedule (0)Important dates Full list of milestones (level 1-2-3) can be found at: http://cmsdoc.cern.ch/Tracker/managment/LHCC/Milestone_list.doc PRR 15/6/00 Tender for sensors 3/7/00 EDR 20/11/00 Signature of sensor contract 15/2/01 Test of system aspects with pre-production modules 15/3/01 Tender mechanical structures 15/1/01 First production module ready 30/9/01 First rod ready 21/1/02 First petal ready 15/4/02 Mechanical structures ready 16/9/02 Delivery of TIB to CERN for Final test 2/2/04 Delivery of End-Cap to CERN 27/2/04 Delivery of TOB to the Tracker 15/4/04 TRACKER DETECTOR INSTALLED 9/5/05 GR TRAK_PRR-01 June 2000

  39. Schedule (1)Tracker installation at CERN Compatible with CMS schedule v. 28 Tracker is lowered into the pit 16/12/2004 fw shift of this date is used as contingency TOB commissioning ends by 15/4/04 TIB installed by June 2004 TIE installed by August 2004 TFE installed by October 2004 GR TRAK_PRR-01 June 2000

  40. Schedule (2)Detectors production Detector production must end by Q1 2004 Sensors delivery time is 2.5 years Detector production must start in Q3 2001 GR TRAK_PRR-01 June 2000

  41. Schedule (3)Preparation of production Can we start detector production in Q3 2001 ? Tender for sensors 3/7/2000 - Draft already existing. Draft Technical specification existing. Start delivery June 2001 Sensor testing centers (some already ready) all centers ready by 1/5/01 Gantry centers: commissioning 1st center 9/00 all centers ready by 15/3/01 Bonding centers (partially ready) all centers ready by 4/6/01 FE Hybrids Production ceramic proto by 7/00 Final production starts 1/3/01 FE electronics Components tested, System test on prototipes done in 05/00. Detectors+FE Hybrid+FE electronics Need final system test foreseen in May/01 with final design modules mounted on structures and read out by final electronics GR TRAK_PRR-01 June 2000

  42. Schedule(4)procurement of FE electronics After 4 wafers production and evaluation in Q3/00 In Q4/00 we will submit a 50 wafers order (10% of total production) before the system tests. This order will be sufficient for producing modules until Q4 2001 included. GR TRAK_PRR-01 June 2000

  43. Schedule (5)Milestone 200 We foresee the procurement of sensors to equip 200 detectors (80 TOB, 40 TIB, 80 W6 of TFE). These detectors will be ordered in July 2000 (procurement procedure already started) Equipped with frames of the final design (procurement procedure already started) Equipped with (ceramic) hybrids of the final design (design in preparation) Equipped with ASICS of the final design (from the last engineering run already submitted) These detectors can be used in the Tracker GR TRAK_PRR-01 June 2000

  44. Why to produce 200 detectors • Procure a sufficient number of detectors of the final design for the system tests before launching the big orders of electronics • Exercise the production procedure before the start of the production to identify and correct possible bottle-necks • Motivate the production and testing centers to an early preparation • 200 detectors are 1.3% of the total number of detectors. Their projected cost is about 1.3% of the cost of the whole tracker. GR TRAK_PRR-01 June 2000

  45. Conclusions • As you will also see from the following presentations: • We believe we have designed a robust detector for tracking at LHC • We have an aggressive plan for the production of 220 m2 of silicon detectors and we believe we can produce them in 2.5 years • We have to start very soon the procurement of 200 detectors for starting/validating the production line and for system tests. • We ask green light for this procurement GR TRAK_PRR-01 June 2000

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