Difference between revisions of "Minutes-4-14-2011"
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== Production == | == Production == | ||
| − | - 11 cathodes were inspected so far; one panel was damaged by us because of incorrect | + | - 11 cathodes were inspected so far; one panel was damaged by us because of incorrect packaging. |
| − | - the first production cathode was glued, tensioned and the frame was glued to it; cutting the flaps and the holes is next. Some of | + | - the first production cathode was glued, tensioned and the frame was glued to it; cutting the flaps and the holes is next. Some of these procedures still require signatures. Cutting of the second production cathode started with problems with the cuter. Bill thinks it is the granite surface that damages the blades. Using harder blade and treating the granite surface must help. Bill also made modifications to the cuter to prevent wobbling of the blade. |
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| + | - the PCB ring was glued for the first production wire frame. Tests with light show the surface at the seams is not perfectly flat. Anatoly will work on this. Next steps: trimming the Rohacell OD on the wire frame and laminating the PCB ring. We will accelerate this so that we can work on the wire frame in parallel with the cathodes. Bill asked if it will be acceptable to use parafin to cover some parts of the Rohacell OD that is needed for the ultrasonic cleaning. Lubomir will investigate this. | ||
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- Just before the meeting the review committee sent us their final report, linked above to the agenda. Eugene commented on it: there are no show-stoppers and the FDC production can continue. There are no recommendations, just findings and suggestions on which we may answer later. The main suggestion is to test the z-axis conductive tape technique for gluing the rigid-flex assemblies. They suggest to study the radiation damages and also to continue with the conventional testing in longer term. Even if it turns out later during the production that there are problems with this technique, it will be possible to re-solder the rigid-flexes using standard soldering technique. The committee also suggested to work on the packaging and storing of the materials and assemblies. There were some healthy concerns related to the air quality (due to the use of chemicals), HV as used for testing the chambers and also ergonomic conditions. Overall the conclusions of the committee are very positive and Eugene thanked to the people involved in the FDC review. | - Just before the meeting the review committee sent us their final report, linked above to the agenda. Eugene commented on it: there are no show-stoppers and the FDC production can continue. There are no recommendations, just findings and suggestions on which we may answer later. The main suggestion is to test the z-axis conductive tape technique for gluing the rigid-flex assemblies. They suggest to study the radiation damages and also to continue with the conventional testing in longer term. Even if it turns out later during the production that there are problems with this technique, it will be possible to re-solder the rigid-flexes using standard soldering technique. The committee also suggested to work on the packaging and storing of the materials and assemblies. There were some healthy concerns related to the air quality (due to the use of chemicals), HV as used for testing the chambers and also ergonomic conditions. Overall the conclusions of the committee are very positive and Eugene thanked to the people involved in the FDC review. | ||
Revision as of 15:35, 14 April 2011
April 14, 2011 FDC meeting
Agenda
- Production status (Dave)
- Electronics
- Status (Fernando,Chris)
- fADC125 requirements
- Cathode foil inspection
- Engineering
- Status (Bill)
- Radiation tests with conductive tape (Lubomir)
- Chamber testing (Lubomir)
- Other
