Difference between revisions of "Minutes-10-13-2011"
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== Production == | == Production == | ||
| − | - Dave: First package is was fully | + | - Dave: First package is was fully assembled as of yesterday. Now working on the second package. The first cathode (type-3) is ready. Working also at another two cathodes and two end windows together in order to save conductive epoxy. There was a problem with the first wire frame when replacing the HV caps. The first replacement resulted in somewhat elevated leakage currents and it was decided to replace them once more. After the caps were removed it turned out many many of their pads delaminated. |
- We have four cells in the first package as of Tuesday evening. Finally we fixed the gas leak in the second cell (at the third attempt): a bubble in the epoxy inside the chamber (that seals the gap between the solid part of the g10 and the PCBs) made a path for the gas to leak. A missing part of the trace on a signal wire in the third cell was fixed by Dave. All the channels of all the wire planes and cathodes were checked with a generator prior the installation. We had to replace the top spacer ring because it turned out after the first installation that the gas openings were not drilled there. Bill proposed to check the flow trough the gas openings relatively, using a rotarmeter with a fixed impedance. | - We have four cells in the first package as of Tuesday evening. Finally we fixed the gas leak in the second cell (at the third attempt): a bubble in the epoxy inside the chamber (that seals the gap between the solid part of the g10 and the PCBs) made a path for the gas to leak. A missing part of the trace on a signal wire in the third cell was fixed by Dave. All the channels of all the wire planes and cathodes were checked with a generator prior the installation. We had to replace the top spacer ring because it turned out after the first installation that the gas openings were not drilled there. Bill proposed to check the flow trough the gas openings relatively, using a rotarmeter with a fixed impedance. | ||
Revision as of 23:02, 13 October 2011
October 13, 2011 FDC meeting
Agenda
- Production Construction Tracking (Dave)
- Status
- First package tests (Lubomir)
- Engineering update (Bill)
- Electronics update (Chris)
- Testing set-up at EEL126 (Beni)
- Other
