1. UK ATLAS SCT Module Quality Assurance Joe Foster, Manchester University 04 Jan 2005 All results compiled in time for Christmas…

2. Last year I … Was responsible for quality assurance on all UK SCT endcap modules. Helped refine module acceptance criteria. Ran web pages of current UK module statistics. Examined and evaluated detailed test histories of 364 modules. Chased missing test result, hidden problems, database funnies, unexplained failures, etc. Was an officially sanctioned grumpy old man.

3. Next Year I’ll… Carry on with UK endcap module QA. Examine another 250 or so module test histories in detail. Further refine acceptance criteria to ensure we have enough modules of the right sort. Maybe move to integration of SCT in ATLAS. Do some e-Science. Increase my rating to ‘grouch’?

4. Aims of Module QA Monitor each step of module production. Continuous health check on each module. Monitor overall production rates, yields, etc. Provide complete history of each module. Select the best modules for assembly in SCT. Pass module parameters on to reconstruction and simulation.

5. Module QA Tools Production Database: –Current location and status of every SCT component. –Complete test history of of each component. –Shipping history of each component. –Complete assembly ‘family tree’. –Accessible world wide. Module ‘traveler’ and visual inspection sheets. Locally archived test results. Scanned images of assembled modules. Personal notes from meetings, emails, etc.

6. UK Module Production Rates

7. UK Modules Started

8. Yield of Good + Pass UK Modules

9. Leakage Current, All UK Modules

10. RC Defects, All UK Modules

11. Noise Occupancy, All UK Modules

12. Midyf, All UK Modules

13. Midyf vs Midxf, All UK Modules

14. Msy vs. Mhy

15. Zmax, Zmin Front, All UK Modules

16. Zmax, Zmin Back, All UK Modules

17. Zminf vs. Zminb, All UK Modules

18. Time to Complete UK Module Testing

19. Failure Modes Failure ModeOutersMiddlesInners Broken bits720 IV510 No HV bias110 RC defects701 Noise Occupancy 210 Trim(1)00 XY survey415 Z survey200 Misc.100

20. UK XY/Z Survey Parameters out of Spec. ParameterPassOutside Pass Mhy41 Msx01 Msy30 Midyf84 Sepf01 Sepb03 Zminf90 Zminb30 Zmaxf10

21. Recoverable Modules ReworkModules Redefine ‘Pass’20220240100158, 208, 211, 365, 407(?) Repair Bonds20220240100043, 144, 381(?), 392(?) Replace Chip20220240100082, 083, 095, 195, 210, 237, 402 Others20220240100119, 320(?) Could recover ~5 modules by extending Pass spec. Up to 7 could be recovered by chip replacement.

22. Module Summary TypeStarts Under Test, OK Eval Good + Pass Yield Outer250162312040.88 Long Middle 12311221160.95 Inner79611080.80 Four inners fail ‘pass’ cuts due to jig teething problems.

23. Conclusions Good module QA information. Good QA information on production processes. UK should meet commitments on number and quality of modules.