1. Jack Fowler Duke University Spain Workshop - 2003
Duke Modules Final QA
Jack Fowler
Duke University
Spain Workshop

2. Final Mechanical Completion Steps
Stringing – HV and Tension Test
All wires draw less than 10 uA at 1.7 kV in room air Tension 128 to 170 Hz
Complete through M2.36 and ~ 800 wires left to string
Ground Wire
Solder to Tension plate and epoxy to shell
Complete through M2.34 and 3.30
Sealing Modules
Seal all eyelets and fill all shell holes with epoxy
Complete through M2.33
Dimension Test
Module fits length and stay clear fixtures.
Module Weight
Completed as modules are shipped to Hampton University
Jack Fowler Spain Workshop 2003

3. Final QA Testing HV Testing /Current prior to Signal Test
Ar-CO2 and Air
All wires hold 1600 V
Currents typically 200nA
Complete thru M2.30 and 3.30
Ionization Leak Test
Current spec < 1 mbar /bar/min Old Spec < 0.1 mbar/bar/min
Complete thru M2.25 and 3.28
Purging Volume Leak Test
< 200 mbar/bar/min
Signal Test
Ar-CO2 at 1550 V
Complete through 2.30
Jack Fowler Spain Workshop 2003

4. Module Weight Type 2 Modules Type 3 Modules
Average weight = 4260 grams
Sigma = 48 grams
Type 3 Modules
Average weight = 6492 grams
Sigma = 57 grams
Jack Fowler Spain Workshop 2003

5. Ionization Leak Test Results
Jack Fowler Spain Workshop 2003

6. Purging Volume Leak Results
Jack Fowler Spain Workshop 2003

7. Mechanical and HV Discrepancies
Capacitor barrel leaks
4 modules
Cooling sleeve tears
3 modules
Shell extending beyond boundaries
17 modules
HV Trips (to neighbor groups)
10 modules
Shorted HV Groups to each other
4 modules (but none to Shell!!!)
Jack Fowler Spain Workshop 2003

8. Wire/Straw Discrepancies
Wire shorted to straw
Wire impossible to string
Wire left inside straw
Straw leaks
Noisy wires at Signal Test
Socket/Eyelet not connected
Wire anomaly from Gain Map
Jack Fowler Spain Workshop 2003

9. Wire/Straw Status “DEAD” straw
Cannot hold HV
Leak
Impossible to string
“REMOVED” but can be restrung and tested at CERN 154
“AS IS” but will be retested or restrung at CERN 154
Jack Fowler Spain Workshop 2003

10. Module 2.20
Jack Fowler Spain Workshop 2003

11. Module 2.23
Jack Fowler Spain Workshop 2003

12. “AS IS” Wires and Straws
Jack Fowler Spain Workshop 2003

13. “REMOVED” Wires and Straws
Jack Fowler Spain Workshop 2003

14. “DEAD” Wires or Straws
Jack Fowler Spain Workshop 2003

15. Summary of Modules All modules are functional
No major defects on any of the modules
0.56 % of the straws have any issues, as is, removed and dead (107 out of 19071)
0.13 % are Dead leaving DUKE (25 out of 19071)
All will be complete and shipped to Hampton in 2003!
Jack Fowler Spain Workshop 2003