US CMS Silicon Tracker : Schedule

1. US CMS Silicon Tracker : Schedule J. Incandela University of California Santa Barbara US CMS Silicon Tracker Project Manager Fermilab PMG April 9, 2004

2. Components “If they come, we will build it” • We do not have direct control but in the past year we have exerted a major influence. • Problems with components, many of which were found in the US, led to delays of varying lengths • Module breakage in transport → 2 months • Hybrid Cable problem → +3 months • ST Sensor issues → +5 months • ST sensors are the greatest concern

3. Current situation • 7000 thick sensors have been ordered from HPK • This was a major achievement in which the US was very active • HPK must know by July if we want to increase this order in order to maintain CMS production without interruption. • This will depend upon whether STM is qualified or not • The agreement with ST • Produce 1000 sensors with final processing by May • CMS to determine if these sensors are acceptable according to a barrage of strict tests • IV,CV with vacuum - Full strip test - Long term test for 72 hours - Proton irradiation of sensors and test structures • Module construction OB1 and OB2 in the US • Studied for sensor related defects, e.g. CMN, unstable current, irradiation of modules, etc. • If acceptance rate <98% order shifts 100% HPK • This plan was presented to STM on March 31st

4. HPK & STM Dynamic Sharing • HPK plans to reach 1500 sensors/month in July • HPK plan below was established in January at production site in Japan

5. Front end hybrids As of 3/31/04 1062 good Hy accepted 581 assembled with PA I expect yield to stabilize at ≥ 90%

6. Rods • Component issues here as well • OptoHybrids • Large quantities already shipped directly to CERN • Frames • 150 delivered • CCU modules are the main issue now. • Require 100/month • Will be reached within 3 months • Mounting/cabling at CERN • Can reach production rate of 50 rods/month • US could conceivably help here if necessary

7. A Battle Hardened Schedule

8. US Module Production(as determined by A. Cattai, J. Incandela, S. Schael) • This is our current module production schedule: • USA module final production • TOB modules: Early June 2004 to May 2005 • TEC modules: Late June 2004 to mid-April 2005 • Paced by sensors • Our colleagues appreciate that we must get all sensors for US production according to a schedule, with significant contingency, that allows us to complete all modules in FY05

9. Other Considerations • Rods are expected to keep pace with module assembly • Schedule for integration of rods on wheels has slipped • US involvement in I&C was scheduled for second half of FY04. • Now expect no significant US involvement before second half of FY04 • Most system integration will likely occur in FY06 – our M&O start year • Also, having developed extremely high production capacities, we have recently analyzed all systems for potential failures that would lead to downtime in production • Ordered and stocked critical spares of fabrication tooling and equipment • Cross-training fabrication personnel to maintain depth at each station • Additional satellite processing capacity in Mexico • Specialized testing and diagnostics capabilities at UC Riverside • Particularly important to remove this work from the production lines where it could be a distraction, leading to disruptions

10. Conclusions • A last round of problems surfaced in late FY03 early FY04 • More delays have resulted • A Major US push - intense, concentrated, exhausting - with similar contributions by many groups in the tracker collaboration got us over the final hurdles for modules • Schedule is the first in which I have a high degree of confidence • Based on component production rates that have been demonstrated by our vendors and module production rates that we have comfortably demonstrated • We also have explicit fallback plans and contingency • 5 months contingency remain for completion in FY05 • We can survive ‘typical’ production problems • A very serious problem could jeopardize our FY05 target