Difference between revisions of "Minutes-5-10-2012"
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== Electronics == | == Electronics == | ||
| − | - Chris: Jim and Chuck made the drawings of the grounding clip. It will be Cu-Be 13mill thick and will have a force of 7.5lb | + | - Chris: Jim and Chuck made the drawings of the grounding clip. It will be Cu-Be 13mill thick and will have a force of 7.5lb; Bill: in this case we have to use Rohacell between the wire frame and the cathode. One company only responded to the bid: $2k for 500 clips (need ~120 per package). Chris submitted a PR. |
- After some discussions we figured out that we can easily extend the grounding to the cathode from the top cell. We just extend the Cu foil to that cathode and put the clips that we have now on the top of the copper foil, thus we will also prevent damaging the cathode foil. In this case we may not need to do the inter-cell ground connections. | - After some discussions we figured out that we can easily extend the grounding to the cathode from the top cell. We just extend the Cu foil to that cathode and put the clips that we have now on the top of the copper foil, thus we will also prevent damaging the cathode foil. In this case we may not need to do the inter-cell ground connections. | ||
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== Tests with first package at 126 == | == Tests with first package at 126 == | ||
| − | - Beni: | + | - Beni: working on the wire resolution. So far it is much worse than it was in the prototype, about ~400 microns. Beni traced down the problem to the very bad timing resolution of ~14ns. It was estimated using a simplified scheme: separating only vertical (from the Indiana chambers) tracks and comparing the timings from the parallel wires in the first and fourth packages. Most likely to problem is due to the oxygen in the gas, but Beni wants to check the F1TDC using different mode. Also it could be a result of a poor angular resolution of the Indiana chambers, but to see its effect it must be worse than 5mrad. Beni will report on this in the Collaboration meeting. |
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| + | == Other == | ||
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| + | - Vladimir is arriving on May 30 for six months, will be helping with the package tests. | ||
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| + | - Due to the Collaboration meeting Monday-Wednesday next week, unless there's something urgent, we will not have FDC meeting next week. | ||
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Revision as of 18:38, 17 May 2012
May 17, 2012 FDC meeting
Agenda
- Production Construction Tracking (Dave)
- Production status
- Third package tests (Lubomir)
- Engineering update
- Electronics update (Chris)
- Grounding
- Tests with first package in 126 FDC E-log (Beni)
- Other
