1. Module Production and Testing at Duke
Jack Fowler

2. Production Status
Fowler Duke HEP

3. Module Straightness Module 2.1 Module 2.2 Module 2.3 Module 2.4
200 microns
Module 2.2
150 microns
Module 2.3
125 microns
Module 2.4
Module 2.5
175 microns
Module 2.6 Initial
125 microns
Fowler Duke HEP

4. Module 2.5 Straw Alignment
Fowler Duke HEP

5. High Voltage Testing High voltage plates are tested
initially from supplier
after the Kapton forming process
after insertion of straws
after 1st end outer wire supports are conductive glued
after 2nd end outer wire supports are conductive glued
after sealing glue is applied to outside of HV plate
after potting of inside of module
after stringing
after final gluing and leak test
Fowler Duke HEP

6. High Voltage Testing (2)
High voltage plate tests includes:
visual inspection
dimensional inspection
continuity tests
resistance values
high voltage breakdown up to 3 kV
current draw
Fowler Duke HEP

7. High Voltage Testing Results
Module 2.1
Pad 63 and 64 short
Pad 53 2 kV
Pad 46 2 kV
Pad kV
Module 2.2
Pad 20 and 30 short
Module 2.3
Pad 3 to kV
Pad 9 to kV
Pad 26 and 37 short
Pad 60 and 61 short
Module 2.4
Pad kV
Pad kV
Module 2.5
no problems through mechanical assembly
Module 2.6
no problems through acceptance test
Fowler Duke HEP

8. Straw Resistance Testing
Straw resistance is tested at Hampton prior to shipment
During production straw resistance is tested:
after straw insertion and the first end outer wire supports are conductive glued. This is an individual resistance.
After second end outer wire supports are glued. This is a group resistance between pads.
Fowler Duke HEP

9. Straw Resistance Testing Results
Module 2.1
No straws over 200 ohms
Pad resistance range 5.8 to 7.5 ohms
Module 2.2
Pad resistance range 5.6 to 7.0 ohms
Module 2.3
96 straws over 200 ohms*
Pad resistance range 5.6 to 8.0 ohms
Module 2.4
6 straws over 200 ohms
Pad resistance range 4.8 to 8.0 ohms
Module 2.5
1 straw over 200 ohms
Pad resistance range 5.2 to 7.5 ohms
Fowler Duke HEP

10. Module 2.5 Individual Resistances
Fowler Duke HEP

11. Module 2.5 Island Resistance
Fowler Duke HEP

12. Leak Test Results Module 2.1 Module 2.2 Module 2.3 Module 2.4
no detectable leak
Module 2.2
Module 2.3
Module 2.4
Module 2.5
Detection Limits
Fowler Duke HEP

13. Stringing Results Module 2.1 Module 2.2 Module 2.3 Module 2.4
21 days to string
12 wires arc, restring
Module 2.2
37 wires arc, restring
Module 2.3
16 days to string
20 wire arc, restring
Module 2.4
14 days to string
12 wires arc, restring
Module 2.5
in process
Improvements made
deburr twisters
change lead wire
Fowler Duke HEP

14. Stringing Stations
Fowler Duke HEP

15. Module Completion Summary
Straw 83, stringing problem, dead channel
Straw 400, stringing problem, dead channel
Module 2.2
Straw 292, stringing problem, dead channel
Module 2.3
no problems
Module 2.4
Straw 48, straw leak, dead channel
Fowler Duke HEP

16. Module Weights Module 2.1 Module 2.2 Module 2.3 Module 2.4 Module 2.5
4.28 kg
Module 2.2
unable to measure, gain testing
Module 2.3
4.37 kg
Module 2.4
4.22 kg
Module 2.5
3.97 kg before stringing
Fowler Duke HEP