TRD Production at GSI Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005.

TRD Production at GSI

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

Overview

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

- Status L5C1/L4C1

- Glue System

- Testing the Properties

- Summary

30 Radiators Frames glued

21 Radiator Frames wired

23 Padplanes glued 2 Padplanes bad

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

Production Status L5C1

19 Moduls tested with Fe55 Source

Closed with Tape

Gas ArCO2 70/30

HV-Anode 1620 V, HV-Drift -2000 V

O2 Concentration below 30ppm, Flush 40l/h, 8h

up to know Dark Current < 1nA

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

Testing Status L5C1

Finally glued Chamber

2 Modul tested with Roentgen Source

Gas ArCO2 70/30

HV-Anode 1620 V, HV-Drift -2000 V

O2 Concentration below 10ppm, Flush 40l/h, 8h

up to know Dark Current < 1nA

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

Testing Status L5C1

11 Radiators Frames glued

5 Radiator Frames wired

5 Padplanes glued

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

Production Status L4C1

1 Moduls tested with Fe55 Source

Closed with Tape

Gas ArCO2 70/30

HV-Anode 1620 V, HV-Drift -2000 V

O2 Concentration below 30ppm, Flush 40l/h, 8h

up to know Dark Current < 1nA

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

Testing Status L4C1

Problem with Glue System

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

- Used Araldit AW 106/AW116 with Hardener HV953U

- Sticky surface after curing time

- Problem in Producing Hardener HV 953 U since 2004

Decision

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

- Stop the TRD Production

Mechanical and electrical Properties

Chemical Composition was changed

- Get a Charge of an modifcated Hardener to test the

mech. and electr. Properties

Test mechanical Properties

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

- cured Glue min. 24h under different

climatic Conditions

Shore Hardness is 60

- Observed Different Surface Quality, it depends on the

Huminidity and the retention time in Air

Humidity rel. 2% - 50%Temperature 23 º C – 40 º C

one Sample cured in NitrogenAtmosphere

Test Electrical Properties

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

- under different Climatic Conditions

Volume Resistivity 300 G – 8 T Ohm cm

Humidity

rel. 2% - 50%

Temperature

23 º C – 40 º C

one Sample has

cured in Nitrogen

Atmosphere

CONCLUSION

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

- Orderd and distributed Hardener

to finished the TRD Production

- Additional Ageing Test

SUMMARY

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

- Delay of 6 weeks in the Production Scale

- 4 L5C1and 4 L4C1 finished to shipped to HD End of October

- Production Mode to build 2 TRD Chambers / 7 Working Days

Joerg Hehner TRD Collaboration Meeting Bucharest 26.09.2005

Thank you

Sandra Schwab, Anja B. Steffen

Gert Augustinski, Andre Radu,

Heinz W. Daues

and all the Students