Difference between revisions of "Minutes-10-20-2011"
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(Created page with "October 20, 2011 FDC meeting = Agenda = # Production [http://www.jlab.org/Hall-D/detector/fdc/production/FDC_Construction_October_20_2011.xlsx Construction Tracking] #* Status ...") |
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| − | Participants: Eugene, Bill, | + | Participants: Eugene, Bill, Tim, Beni, Mark, Vladimir, Chris, Dave, Glen, Simon, Casey, and Lubomir. |
== Production == | == Production == | ||
| − | - Dave: | + | - Dave: Working on second package. First end window ready, second will be ready by the end of the day. Two cathodes (type-1) are ready. Another two cathodes (type-2 and 3) just need the daughter cards to be put on (the last operation). The first wire frame was strung and taped, but there were some delays with the position measurements. Wire scanning stops in the middle of the chamber, most likely due to a combination of software and hardware issues. Will try to find the Caleb's original software (Parker ACR project) and use it, at the same time to identify why it stops, which is the signal causing this. |
- Lubomir: Full first package running with gas since Wednesday evening. Leakage very low: bubbling at 35 ccpm. Will start testing today evening or on Friday. Valdimir tested the five cells before and found one problem: on one of the newly installed cathodes (type-1) on the top of cell#4, one flex delaminated completely from the cathode. All the conductive tape was on the cathode and nothing on the flex which is not normally what we see. Suspect the gluing temperature was not correct. Also the kapton tape that we put on the top of the flex/cathode was covering mostly the flex area and it may have lost adhesion to the cathode during cathode installation due to g10 deformation. In several cases when we had to remove the rigid-flex from the cathode pieces of conductive tape remain on both sides. The flex was glued again and the cathode installed at the same place. Now with all the six cells in the package Vladimir will test all the planes above and including this cathode since all these were either re-installed or never tested. | - Lubomir: Full first package running with gas since Wednesday evening. Leakage very low: bubbling at 35 ccpm. Will start testing today evening or on Friday. Valdimir tested the five cells before and found one problem: on one of the newly installed cathodes (type-1) on the top of cell#4, one flex delaminated completely from the cathode. All the conductive tape was on the cathode and nothing on the flex which is not normally what we see. Suspect the gluing temperature was not correct. Also the kapton tape that we put on the top of the flex/cathode was covering mostly the flex area and it may have lost adhesion to the cathode during cathode installation due to g10 deformation. In several cases when we had to remove the rigid-flex from the cathode pieces of conductive tape remain on both sides. The flex was glued again and the cathode installed at the same place. Now with all the six cells in the package Vladimir will test all the planes above and including this cathode since all these were either re-installed or never tested. | ||
Revision as of 15:53, 20 October 2011
October 20, 2011 FDC meeting
Agenda
- Production Construction Tracking
- Status (Dave)
- First package tests (Lubomir)
- Resistance of z-axis conductive tape (Lubomir)
- Engineering (Bill)
- Cooling/grounding system
- Other: protective covers, new hubs, ...
- Electronics update (Chris)
- Testing set-up at EEL126 (Beni)
- Other
