Difference between revisions of "Minutes-12-6-2012"
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# Tests at EEL126 [https://halldweb1.jlab.org/elog-halld/FDC FDC E-log] | # Tests at EEL126 [https://halldweb1.jlab.org/elog-halld/FDC FDC E-log] | ||
# Other | # Other | ||
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= Minutes = | = Minutes = | ||
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== Cathode corrosion test == | == Cathode corrosion test == | ||
| − | - Lubomir: test #3 (Ar/CO2 gas, at ~70degC). One more sample failed over the weekend: one of the two Viton samples, second Viton is OK. | + | - Lubomir: test #3 (Ar/CO2 gas, at ~70degC). One more sample failed over the weekend, 25 days after the start of the test: one of the two Viton samples, second Viton is OK. Again we suspect it is the solder that failed. |
== Engineering == | == Engineering == | ||
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- Without Bill not much to say. | - Without Bill not much to say. | ||
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- Chris: the ground clips were shipped will be here soon. Finally the daughter cards arrived and we started using them at Blue Crab. However, it turned out they have not been tested. Chris/Nick will take them n | - Chris: the ground clips were shipped will be here soon. Finally the daughter cards arrived and we started using them at Blue Crab. However, it turned out they have not been tested. Chris/Nick will take them n | ||
ext week for testing, except the cards that were put on one cathode that will be tested at Blue Crab. | ext week for testing, except the cards that were put on one cathode that will be tested at Blue Crab. | ||
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== Tests at EEL126 == | == Tests at EEL126 == | ||
Revision as of 17:12, 6 December 2012
December 6, 2012 FDC meeting
Contents
Agenda
- Production Construction Tracking
- Production status (Dave)
- Package testing (Lubomir)
- Corrosion tests (Lubomir)
- Engineering (Bill)
- Electronics (Chris, Nick)
- Tests at EEL126 FDC E-log
- Other
Minutes
Participants: Eugene, Bill, Dave, Chris, Nick, Simon, Beni, and Lubomir.
Production
- Dave: priority is to finish the two type-3 cathodes so that we can build three cells from package #2. The first type-3 will be ready on Monday, then we can start the package #2 installation. Working also on all the other cathodes for this package. Since Tina and Mike will start working also on BCAL we'll have to find a way to finish at least these cathodes, that has to be done by the end of January.
- Package #4: the broken wire (top cell) was replaced and the package put together last Friday. This week the top cell was tested: all channels working fine, very low currents of 15/-4nA, oxygen after six days flushing ~160ppm. The plan is to take the package from the installation table and start putting the other subsystems. The problem is that we still don't have the clips.
- Package #3: as explained in entry #98, the package was connected to the Nitrogen dewar with a rotameter at 30sccpm, and there was an over-pressure over the last weekend. We measured the pressure at the output of the rotameter: 360Pa, so the pressure in the chamber must have been below that.
Electronics =
- Chris: delay with the clips due to lack of material. They made only 135 (out of 500) and Chris asked them to ship these; plus about 50 here could be enough for one package. Nick populated one more set of PCB and will do another (the last) one soon.
Cathode corrosion test
- Lubomir: test #3 (Ar/CO2 gas, at ~70degC). One more sample failed over the weekend, 25 days after the start of the test: one of the two Viton samples, second Viton is OK. Again we suspect it is the solder that failed.
