Tues 15/12/15
Swapped previously tripped detector (3131-11) on to kaptons already in place for (working) 2977-15 and attempted to bias
- i.e. made no changes (FEEs, or jumpers etc) to the known working setup of 2977-15, just replaced the detector with 3131-11
> still trips at ~6-7V
> conclusion: He's dead Jim.
Took some measurements of rough max positions of DSSSDs from the FEEs with the current 90cm kaptons (pictures in attached PowerPoint and PDF)
- Vertical EURIKA support to centre of EURIKA ~ 60cm
- AIDA Cu cooling pipe to end of snout ~ 75cm
- Base of snout to end = 57cm
- Min distance from end of snout to inner most FEE (horizontal FEEs) ~ 92cm
- additional 6cm per extra adapter
- Further DSSSD can go from base of snout ~ 54cm (60cm from Cu pipe)
- limiting factor is kaptons to nnaida5+6 (bottom stack). Still a few more cm slack in the other kaptons.
- For kaptons in 4th horizontal connector (furthest slot in 2nd adapter), detector 48cm from base of snout.
- For kaptons in 8th horizontal connector (furthest slot in 4th adapter), detector 36cm from base of snout.
Note (PCS): In disconnecting things to check ground connections, and when putting AIDA away before I left, I noticed ~20% of the network cables are of the shielded variety. I know this didn't seem to make any difference in the setup at DL, but I don't know how concerned you are about this and if you would suggest changing them in future.
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