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US Module Production

US Module Production. Prof. J. Incandela US CMS Tracker Project Leader For the US CMS Tracker Group Tracker Meetings - CERN Feb. 13, 2004. US Responsibility. End Caps (TEC) Up to 2000 TEC Modules for rings at large radii and hybrid processing for all Rings. Outer Barrel (TOB). 2.4 m.

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US Module Production

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  1. US Module Production Prof. J. Incandela US CMS Tracker Project Leader For the US CMS Tracker Group Tracker Meetings - CERN Feb. 13, 2004

  2. US Responsibility End Caps (TEC) Up to 2000 TEC Modules for rings at large radii and hybrid processing for all Rings Outer Barrel (TOB) 2.4 m 5.4 m

  3. Current Status • Module production lines at >90% preparedness • Final equipment & personnel now falling into place as per our plan to upgrade capacity to 15 modules per day per site. • Both sites have recently obtained or achieved the following • 4 hybrid test stands • Fully automated wirebonding • Automated surveys of modules on gantry plates with OGP • Roughly adequate module test and burn-in equipment • Skilled manpower • Rod assembly, testing and LT test • Also here final pieces are coming together • Both sites have recently obtained • Assembly tools and fixtures (From CERN and UCSB) • Single-rod test boxes • Rochester boxes (8 rod LT) • Adequate power supplies/cables to make one stand fully functional (some to be shipped to us this week).

  4. US Group • Fermilab (FNAL) • M. Demarteau, M. Hrycyk, A. Ronzhin, K. Sogut, L. Spiegel, S. Tkaczyk + 5 tech. • Kansas State University (KSU)  Pixels (but W. Kahl will still pitch in) • University of California, Riverside (UCR) • Gail Hanson, Gabriella Pasztor, Patrick Gartung • University of California, Santa Barbara (UCSB) • A. Affolder, S. Burke, C.Campagnari, D. Hale, (C. Hill), J.Incandela, S. Kyre, J. Lamb, S. Stromberg, (D. Stuart), R. Taylor, D. White + 7 tech. • University of Illinois, Chicago (UIC) • E. Chabalina, C. Gerber, T. Timour • University of Kansas (KU) • P. Baringer, A. Bean, L. Christofek, X. Zhao • University of Rochester (UR) • R.Demina, R. Eusebi, E. Halkiadakis, A. Hocker, S.Korjenevski, P. Tipton • Mexico:3 institutes led by Cinvestav Cuidad de Mexico • 1-2 more groups are in the process of joining us

  5. Hybrid Wire Bonding/Thermal Cycling • UCSB stand fully commissioned 28/d without difficulty • 80 hybrids bonded and thermal cycled • 4 PLL failures -20C • 2 APV failures • Several with opens • FNAL stand complete and shipped from UCSB • Received yesterday • Operational by end of Feb. • Mexico City box under construction • Ready ~ April Nominal capacity = 84 hybrids per day, but hope to distribute load to Mexico City in order to free up resources at module production centers

  6. Vienna Boxes • Fully operational @ both sites • 10 modules for 10(14) hours with 1(2) thermal cycles • PedRun, CalRun, IVRun. • 2 grad. students and 2 technicians trained in operation of box

  7. Demonstrating High Rates • Plan • Sustain our targeted steady-state rate for 2 weeks at each site • Firmly demonstrate new peak capacity of 15 modules/day. • Determine if module fabrication and testing capabilities are truly adequate or need more tuning • Build many modules starting w/the best STM sensors • Plan agreed upon at December CMS week • See if there exist subgroup of acceptable sensors • Schedule for 2 week production runs of 150 modules • UCSB: January 26 to February 9 – completed • FNAL: February 23 to March 8 – in preparation • UCSB Results • Met production and testing targets without difficulty • Very low rate of introduced failures seen • But no change in the rate of occurrence of modules with CMN • Did not depend on production period or sensor grading • No sub-classifications of STM sensors appear to be immune

  8. TOB Module Production UCSB Gantry Team at work 5 TOB rfassembly plates, each with 3 new modules curing under vacuum. Full plate survey on OGP

  9. UCSB 150 Modules Run: Mechanical Precision (1) Delta Sili1X3 Sili2X1 150 module production run: 10d period @ 15 modules/day Sili1 Sili2 Angle Arrows  current specifications

  10. UCSB 150 Modules Run: Mechanical Precision (2) Sili1 to Frame Angle Sili2 to Frame Angle

  11. UCSB 150 Modules Run: Mechanical Precision (3) Delta Sili1X1 HybridX1 Hybrid Y2-Y2nom

  12. UCSB 150 Module Run: Gantry • 8 modules flagged out of 150. • Only 3 are at all serious; all 3 correspond to the same plate and position

  13. Gantry Lessons • Fine-tuning • 10 modules/position/plate under stable operating conditions • May adjust plates (e.g. plate 2, position 2) • Can adopt additional corrections • U-rotation corrections • Updated X and Y corrections • Hybrid positioning • Add 0.5 mm thick silicon rubber to feet of hybrid tools to eliminate slipping in placement (demonstrated for one tool in this exercise) • Timing experience • After-cure surveying of 15 modules and production of 15 new modules (5 plates) usually accomplished in 6 hours if no problems encountered. • Provides 2 hours contingency per day for problems, cleanup, preparation, adjustments, etc. • A sustainable rate for 2 technicians per 8 hour day

  14. Preparations for Main Production • 10 assembly plates are in design or construction* • 2 TOB R-phi plates + 2 TOB stereo plates + 2 TEC R6 plates • Parts being machined will be delivered by end of February. • Will result in totals of 7 + 3 + 3 respectively (We’ve built 7 R6 modules – generally good quality, 1 has CMN) • 2 TEC R5N plates • Designs nearing completion. • Plan to make 1st modules in March • 2 TEC R5S (stereo) • Designs underway *Based on TPO meeting discussion, may alter quantities

  15. UCSB 150 Module Run:Wirebonding • One technician, working alone, kept pace with module assembly • 150 TOB modules fully bonded in 10 days • More than 50 Hybrids bonded in the same period • A streak of more than 100,000 wires without a single failure • Lessons • Use up a 100 m spool of wire every 2 days • purchasing 750 m spools • New bonding tool every week • Plans • K&S 8060 backup bonder arrives this month UCSB 8090 FNAL 8090’s (3)

  16. UCSB 150 Module Run: Testing • Must keep up with fabrication • Sensor selection • Vienna grading (A+,A,B) • Both sensors same grade • Complete set of tests: • ARCS quick test • Vienna Box • 1 thermal cycle (~7 hours) • LED tests • Lessons: • We can comfortably maintain a test rate of 15 module/day • Wien box preventive maintenance may be required 112 modules under storage

  17. 150 modules tested Failure rates/sources (excluding CMN modules) 0.53% Bad channels on average 0.29% Known bad channels 0.20% Unmarked bad channels 0.032% open hybrid-APV 0.002% module bonding 0.035% bad channels introduced during assembly/bonding Vast majority of introduced failures were on pitch adaptors 101+ modules so far have undergone 8-12 hours in Vienna box with a single thermal cycle Module Grades 126 Grade A 10 Grade B 10 Grade F 11 CMN modules 1 AFTER THERMAL CYCLE 1 doesn’t operate at -20 C Tested in 3 different Vienna box slots 2 missing Al strip metal (over etched, not a scratch) 12 mid-sensor opens in Al 19 mid-sensor opens in Al UCSB Module Quality:Preliminary Results

  18. CMN modules and sensor grading • Sensors graded using Vienna grading rules • All sensors were re-probed prior to assembly • Sensors sub-divided into three time periods • Prior to Week 39, 2002 (Pre-production) • Week 39, 2002-Week 12, 2003 (Production improvements being implemented) • After Week 13, 2003 (Final Production) • 11 Common mode modules found • 1 after thermal cycling • No significant difference between A+ and A sensors or year of fabrication • CMN rate in grade B modules may be higher than grade A+/A

  19. 5018 (built 29-1-04) • Sensors • 31215017 • 31215005 • Channels • 420 at 150 V

  20. 5019 (built 2-2-04) • Sensors • 23863925 • 14845906 • Channels • 158 at 300 V

  21. 5021 • Sensors • 24104901 • 20825302 • Channels • 122 at 300 V

  22. 5081 • Sensors • 23974205 • 23974314 • Channels • 20 at 300 V Intermittent and can decay away

  23. 5103 • Sensors • 15061804 • 23860212 • Channels • 270-331 at 40 V Not the usual symptoms …

  24. 5155 • Sensors • 20275916 • 14739511 • Channels • 43 at 320 V • 405 at 250V

  25. Re-probing Results DI > 5 mA DI > 1.5 mA Can we rule out time evolution ? Consider a simple evolutionary model*: Exponential decay with a fraction F of all sensors changing such that the population with DI > 5 mA grows as F(1 – exp(-t/t))… *Exercise proposed in a discussion with Guido, Tony, Regina and Joe - Dec. ‘03

  26. Fits • Considered various susceptible sub-population fractions F from 0 to 100% and fit for best time constant t • Low values of F yield poor fit • High values of F yield a decent fit. Best fit occurs for F = 100% as seen at right with an essentially flat growth over time This proves nothing about this model This kind of exercise could only be used to rule out models, not confirm them…this model is not ruled out but we sincerely hope that this is not the real situation. Extrapolating over 10 years 32% sensors causing CMN  54% of modules

  27. Module Time Degradation- Module 689 • After 3 months on shelf, FNAL module retested • A second chip now has a high noise channel causing CMN • Channel previously only had a slightly higher noise

  28. Module Time Degradation-705 • After assembly module was tested (09/08) on ARCS at 400 V and graded “B” (6 faulty channels). No problems observed. • After LT, one chip shows CMN • Similar case among 150 UCSB modules recently completed. (not shown among previous plots - data after Wien box not web accessible – will include in note under preparation)

  29. Module Time Degradation-705 II After sitting on shelf for more than 3 months, module re-tested to find a new pinhole

  30. Rods • Recent Efforts • Completed the single rod test stands for UCSB and FNAL • CERN completed rotisserie and rod handling fixtures • UCSB completed module installation tools for US and CERN • LT definition of tests and test methods still must be refined • Production • So far have built 3 SS rods • All 3 built in under 2 hours • Will build and test 688 rods (+spares)

  31. Rochester LT Stands • The hardware and software are essentially completed for the box. • Multi-rod Software still needs to be developed • The commissioning of the burn-in stands is proceeding well, in advance or production ramp-up • We await full complement of cables and power supplies

  32. Summary & Conclusions • US rapidly approaching full production capability • Almost all equipment in place • New higher rate demonstrated w/good quality at UCSB: • Will review residual problems and try to improve procedures, accuracy, quality and efficiency… • FNAL to do similar high rate exercise starting in 2 weeks • Results for modules with STM sensors • New CMN modules • Data do not discount possible deterioration over time • Retested modules @FNAL show further degradation • As stated in September 2003 when I first reported this problem - a good understanding is needed.

  33. 5048 • Sensors • 24102009 • 24102007 • Channels • 382 at 250 V

  34. 5063 • Sensors • 31215004 • 31215007 • Channels • 170 at 250 V

  35. 5119 • Sensors • 24104723 • 23974320 • Channels • 441 at 350 V

  36. 5140 • Sensors • 23974311 • 15061419 • Channels • 48 at 310 V

  37. Fits (low F) • Considered various susceptible sub-population fractions F from 0 to 100% and fit for best time constant t • Low values of F yield poorest fits as seen for F = 5% at right Extrapolating over 10 years:

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