Difference between revisions of "Minutes-6-21-2012"
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== Production == | == Production == | ||
| − | - Dave: Fourth cell was installed yesterday in the | + | - Dave: Fourth cell was installed yesterday in the fourth package. Working also on several spare cathodes. Right after the meeting we installed the fifth one. The plan was to install the last cell on Friday, however, after the meeting we found a bad channel (cut on copper trace) on one cathode that will require more time for fixing; therefore we will finish with the fourth package installation on Monday. |
| − | - The | + | - The second production wire frame: there was a bad HV sector showing ~20MOhm field to sense wires resistance while the other three were OK. Two wires, which pads were covered by the copper sulfide spill there, were replaced by Casey including the epoxy around them that was most likely contaminated by the chemical. |
| − | + | After that we measured the resistance: about 20-30 MOhm and 50-100 MOhm on the other sectors. We recalled that on the first four wire frames we used Epolite that is susceptible to humidity. After flushing the wire frame with gas since Monday today we were able to put 2100/-500V with ~800/-500nA currents, still high but we hope the epoxy will dry and the currents will go down. So far we have one wire frame that can't be used. Eugene suggested not to postpone too much the ordering of the four extra PCB sets. | |
| − | - | + | |
== Engineering update == | == Engineering update == | ||
Revision as of 23:41, 21 June 2012
June 21, 2012 FDC meeting
Agenda
- Production Construction Tracking (Dave)
- Production status
- Spare wire frames (Lubomir)
- Engineering update
- Electronics update (Chris)
- Cable assignment (Vlad)
- Gas system (Beni)
- Test set-up in 126 (Beni)
- Other
