Attachment ageing measurement

1
Attachment ageing measurement

• Part 1 Laser setup
• Part 2 Ageing setup
• (C. Garabatos)

2
AttachmentSetup

• Drift Length 1000 mm
• Difference 524.2 mm
• Drift field up to 200 V/cm
• Prototype chamber
• Measuring
• Attachment
• Drift velocity
• Joule meter to check intensity of the two laser
  tracks
• Upgrade with heating pads and isolation

3
Gas system
Glue sample 2 liter

• Test setup
• No re-circulation
• Glue 410 cm2
• Volume 200 l
• Surface/flow
• 0.013 0.027 h/cm
• Alice equivalent
• Re-circulation
• Volume 88 m3
• Glue 1500 cm2
• Surface/flow
• ??? h/cm

Drift tube 200 liter
Mixing Station
4
Measurement
5
Integral
6
Zero Measurement
c 451 bar-2µs-1
7
Araldite 2013
8
DP 190
9
Araldite 2012
10
Summary of measurement
11
Current conclusion

• No Attachment seen
• Are those glues safe?
• Re-circulation in Alice
• Test setup lt-gt ALICE
• Next steeps
• Re-circulating Gas System?
• Drift velocity measurements
• Attachment measurements
• Monitoring of relevant gas parameters
• Temperature, pressure, oxygen, water, CO2
• Nitrogen