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ATLAS SCT Status Report

ATLAS SCT Status Report. Overview of major production issues Silicon sensors & FE ASIC procurement Power & Readout Power supplies Readout DAQ & DCS Barrel Barrel modules Barrel Harnesses Barrel Engineering Endcap Endcap modules Endcap Engineering Testbeam

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ATLAS SCT Status Report

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  1. ATLAS SCT Status Report • Overview of major production issues • Silicon sensors & FE ASIC procurement • Power & Readout • Power supplies • Readout • DAQ & DCS • Barrel • Barrel modules • Barrel Harnesses • Barrel Engineering • Endcap • Endcap modules • Endcap Engineering • Testbeam • Schedule & critical issues AOW 2003 Prague - SCT Report

  2. Production & acceptance testing of the silicon sensors is ~ complete SCT silicon sensors procurement • Quality of the detectors is excellent • All quantities within specification • Hamamatsu barrel detector summary Very low leakage currents Typically <200 nA at 500V bias at 20oC >99.9% good readout strips • CIS detectors: some IV problems 0.2 mA # defects AOW 2003 Prague - SCT Report

  3. SCT ASIC procurement • Post irradiation studies indicate 10years lifetime @ LHC • Production stopped by ATMEL  Use ASICs with 1 ch. out of specs wherever reasonable (possible): qualification, rework, etc. AOW 2003 Prague - SCT Report

  4. System specification 4088 modules x 1536 channels 6 x 106 readout channels 40 kW power 100 m detector  control room Readout = RODs 48Channels/VME card Pre-series of 7 cards being evaluated +BOC Optoelectronic Back of crate cards First 10% batch in production Custom Opto-packages in production in Taiwan + TIM Available for assembly +Crates, backplanes &SBC +Optical fibres System status All elements prototyped and ATLAS PRR completed Readout & power needed for testing during assembly Power & Cables = LV0 cards (Prague) 4 channels/card 10% production delivered and burned in +HV0 cards 8 channels/card 10% production launched +Backplane, 48V &5V power supplies +Crate controller, crates +Patch-panels PP3 with filters & limiters on ATLAS +Cables 4 types Tender started in August SCT Readout & Power system AOW 2003 Prague - SCT Report

  5. PS RACK (22) PS CRATE EARTH TIE Near PP3 48 VDC POWER PACK PP3 (4088) COMMON MODE CHOKES VOLTAGE LIMITER PS CRATE (4) C C 6 HV CARDS 12 LV CARDS INTERLOCK TYPE III CABLE DCS VIA CANbus PP2 Factory SPLICE DCS INTERLOCK MATRIX TYPE IV CABLE TYPE II CABLE DETECTOR MODULE (4088) LOW MASS POWER TAPE LOW MASS POWER TAPE PPF0 END-CAP ONLY PPB1 or PPF1 SINGLE POINT EARTH SCT Power system schematic AOW 2003 Prague - SCT Report

  6. strip direction strip direction SCT Module Design (Endcap) hybrid connected to sensors only by fanins  thermal split 4 wedge shape silicon sensors 768 p-in-n strips,single sided supplied by Hamamatsu and CiS sensor alignment < 5µm 40mrad stereo angle • 12 ABCD3TAbinary read-out chips SPINE TPG bar for heat removal(1700 W/m/K) AlN wings for mechanical stability hybrid:flex circuit on carbon-carbon AOW 2003 Prague - SCT Report

  7. SCT Barrel modules • Barrel modules are in production • Barrel module PRR May 01 • Silicon sensor production complete May 03 • Barrel module PAR May 03 • Hybrids complete (target) Aug 03 1214/2500 (49%) • Baseboards complete (target) Oct 03 1481/2530 (59%) • Modules-Japan 445/ 786 (57%) • Modules-UK 144/ 549 (26%) • Modules-US 104/ 483 (21%) • Modules-Scand (qualification soon) 31/ 404 ( 8%) • Total (2112+5%) 734/ 2218 (33%) • Modules complete (target) Apr 04 • Production goal is to complete by Apr 04 with a yield > 90% AOW 2003 Prague - SCT Report

  8. SCT Barrel baseboard & hybrid production Production rate is under control – (recently stalled, but recovered) AOW 2003 Prague - SCT Report

  9. SCT Barrel module assembly • Note : Backup slide on s-curves • Critical issues: • Get all clusters into production • Production yield > 90% AOW 2003 Prague - SCT Report

  10. SCT Barrel Optoharnesses • Opto-harnesses are in production • Barrel LM tape production complete • First 2 batches of 8 harnesses each for Barrel-3 evaluated • Start-up delay was caused by ESD damage to DORIC ASIC & other production issues • Start of production recommended • Schedule can be recovered (complete production by the end of 2003) AOW 2003 Prague - SCT Report

  11. SCT Barrel Engineering – Support Structure • All 4 CF cylinders delivered • …but there are ~40000 small parts! • B3 delivered to RAL • B4,5,6 assembly test starting AOW 2003 Prague - SCT Report

  12. SCT Barrel Engineering - Cooling • Design is finalised • 48 module units • CuNi with soldered joints • Concept tested on sector • Cooling design is evolving; which causes delays • Production is ready to start AOW 2003 Prague - SCT Report

  13. SCT Barrel Engineering - Assembly • Assembly phases • Spindle & service cages Underway • FSI Completed • Opto-harnesses Delivered • Cooling Waiting cooling • Modules Modules available Oxford Assembly site almost ready • 4 months late B3 harness assembly at RAL AOW 2003 Prague - SCT Report

  14. SCT Endcap Modules • Modules • Endcap module FDR & PRR Aug 02 & Dec 02 • Module design was validated as suitable for production • Thermal & electrical performance validated • Production • Hybrids • Hybrid production & assembly transferred to industry • Pre-series of 200 in production 44(+48) delivered, remaining show delamination problems • Full order for 2300 placed (2500 in total) • Spines • 229 produced by Protvino/MPI, but with low quality • Contract for 2500 issued • Module assembly • 3 out of 7 production sites qualified for production • 1rst modules within specification • Aim is to have all sites qualified in 2 months • Target is to complete module production in Dec 04 AOW 2003 Prague - SCT Report

  15. Producer Reception Hybrid QA Module Assembly CICOREL Hybrid SA CERN Cracow Geneva/CERN Melbourne RAL UK Valencia Freiburg NIKHEF MPI/Prague Freiburg SCT Endcap hybrid & module production AOW 2003 Prague - SCT Report

  16. SCT Endcap Modules • Hybrid production is starting – need industry to sort out quality problems and achieve required rate • Spine production is critical • Other components are ~ OK (with additional collaboration effort) • Rapid cluster qualification is critical • Aggressive production plan being developed (see backup) AOW 2003 Prague - SCT Report

  17. SCT Endcap Endcap Engineering - Structure • Support structures • CF support cylinders & disks ordered • First support cylinder shown • Scheduled delivery Aug 03 • Problems with wings which will cause 3-4months delay • First 4 discs delivered • Scheduled completion Dec 03 • Again many small parts AOW 2003 Prague - SCT Report

  18. Cooling Design is finalised & prototyped Production of cooling circuits ready to start Services Harnesses expected now LM tapes & PPF0 prototyped SCT Endcap Endcap Engineering - Cooling AOW 2003 Prague - SCT Report

  19. SCT Testbeam 2002/3 & 2004 • Understanding of intrinsic performance of an increasing number of real modules with final components • June 2002, 2 weeks • July 2002, 2 weeks • August 2002, 2 weeks • May 2003, 2 weeks including 25ns measurements • September 2003, ~2 weeks; irradiated modules; common DAQ run • 2004 – Plans for tracking; common DAQ AOW 2003 Prague - SCT Report

  20. SCT Testbeam 2002/3(preliminary) AOW 2003 Prague - SCT Report

  21. efficiency SCT Testbeam track finding studies(preliminary) Example of a track reconstructed in telescope & 4 planes Example of a second track due to hard interaction with silicon. AOW 2003 Prague - SCT Report

  22. SCT schedule & Critical issues • Barrel SCT (ready for integration 15/12/04; ID ready 22/05/05) • Modules ~33% complete ~3 months delay Full production all clusters Yield is critical • Harnesses ~1% complete ~4 months delay • Barrel-3 complete ~3 months late • B3 services ~4 months late • B3 assembly start ~5 months late • Endcap SCT (ready for integration 01/03(05)/05; ID ready 16/08(10)/05) • Current schedule delivers the Endcaps 2 & 4 months late wrt baseline • Modules Starting production Spines critical • Harnesses Started • Disc-9 To be delivered now ~4 months late Critical • D9 services Most orders placed ~6 months late Critical • D9 assembly start ~5 months late • Power, Readout & cables are OK for the experiment but critical for use during assembly AOW 2003 Prague - SCT Report

  23. Invitation For The Lab Tours • A • Strip Detector Lab - Institute of Physics AS • Strip detectors for ATLAS • LVPS • SCT Lab - Charles University • End Cap Module Production • B • Semiconductor Lab - CTU, IEAP • End Cap Module Production AOW 2003 Prague - SCT Report

  24. Backup - SCT ABCD Yield AOW 2003 Prague - SCT Report

  25. Backup - SCT Barrel Hybrid (Pitch adaptor problem) • 2500 hybrids are required to produce the 2112+5% barrel modules • As of June 1st, 1333 hybrids have been produced; Of these: • ~ 200 have problematic pitch-adaptors . First problems were seen at about hybrid number 400, and then again after about hybrid 1200. • The problem is in the Aluminium metallization (on glass substrates). • The 2nd encounter was very severe and the vendor could not reproduce the previous good metallization even after numerous trials. • An alternative vendor has been identified and the quality of the PAs is being cross-checked by barrel clusters before resuming production. • Although the delivery of hybrids had stopped for 2-3 months, the hybrid production excluding the last PA attachment has continued . • Once the PA production is on track, the hybrid delivery will be much faster. AOW 2003 Prague - SCT Report

  26. All ASICs All ASICs Module Average Module Average Link 0 average Link 0 average Link 1 average Link 1 average Log(Occupancy) at 1fC (83 ref modules) Log(Occupancy) at 1fC (25 distorted-s modules) Backup - SCT Module s-curves • The SCT uses binary electronics and is calibrated using threshold scans i.e. the occupancy is measured as a function of the threshold level. • With no injected charge this gives the noise occupancy • Charge injection via a calibration capacitor gives efficiency • On some fraction of the modules the noise occupancy curves below the operating point of 1fC have ‘distorted s-curves’ • No significant differences seen in modules between standard modules and those with distorted s-curves. All noise occupancy values are more than factor 10 less than the specification AOW 2003 Prague - SCT Report

  27. SCT Endcap Module Production Plan AOW 2003 Prague - SCT Report

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