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.