Difference between revisions of "Minutes-10-11-2012"
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== Production == | == Production == | ||
| − | - Dave: | + | - Dave: Fourth cell of the first package was installed yesterday, today we put a cathode from the fifth cell, tomorrow we plan to finish also the last cell. |
| − | We are using the six spare cathodes made at the end of the production. | + | We are using the six spare cathodes made at the end of the production. The last cathode (#58) to finish the package needs the cards glued on it. Wire frame #29 is ready, except wire deadening. Wire frame #30 is on the stringing table, we will have Casey and Mike later in the month to string it. |
| + | |||
| + | - Now we are at most four people at Blue Crab: Dave, Anatoly, Vlad, and Lubomir. Moving the cathodes with the vacuum fixture require four people. | ||
== Cathode corrosion == | == Cathode corrosion == | ||
| − | - | + | - Vlad showed results of the tests in the vacuum chamber at high temperature (~100degC) where all the samples (cathode traces 0.5mm wide) have wires soldered and he measures their resistance continuously without opening the chamber. Using gas, the EPDM sample showed >1MOhm resistance after 8-10 days, which translated to room temperature is ~100 days or more depending on the activation energy. No changes in the Viton, and Viton+Apiezon resistance after 15 days. New tests started with air at 100degC and 100% humidity. No effects yet after 3.5 days. |
| + | |||
| + | - Eugene: humidity doesn't seem to be such important factor; if that's the case the gas itself can contribute significantly to the corrosion?< But then one has to explain the Viton/ EPDM difference, and why the corrosion happens at the O-ring. Eugene proposed to do also experiment in air but at low humidity. In the moment the priority of the studies is to investigate the Viton+Apiezon samples at worse possible conditions and then translate the results to the hall conditions. | ||
== Engineering == | == Engineering == | ||
| − | - Bill | + | - Bill |
== Electronics == | == Electronics == | ||
Revision as of 17:31, 11 October 2012
October 11, 2012 FDC meeting
Agenda
- Production Construction Tracking (Dave)
- Status
- First package assembly
- Corrosion test results (Vlad)
- Engineering (Bill)
- Electronics (Chris, Nick)
- Third package tests FDC E-log (Beni)
- TDR, pages 132-146 (Lubomir)
- Other
