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| | = Minutes = | | = Minutes = |
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| − | Participants: Eugene, Bill, Dave, Chris, Nick, Simon, Beni, and Lubomir. | + | Participants: Bill, Dave, Chris, Nick, Simon, Beni, and Lubomir. |
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| | == Production == | | == Production == |
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| − | - Dave: Spare parts:about 70% are done (see the link above). Tina, Dave and Casey worked last Saturday to catch up with the foil gluing. Dave got an estimate from Vision Machine for two new spacer rings and making a grove on a type-2 cathode frame. Eugene agreed to add to this request also two spacer rings that are 3.5cm thick, these are needed for the proof-of-principle of the cluster counting with FDC. Eugene requested a page explaining the need for this. | + | - Dave: some issues with tensioning mylar on type-2 cathode: bubbles appeared and mylar has to be replaced. Tina will come again this week(end?) to finish the cutting of all the foils needed for the spare cathodes. Casey and Dave will string the last wire frame. On Monday Chris will put the components on the second last wire frame. |
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| − | - Lubomir for package #2: all the channels were tested and are working fine, except noise was found on wire #37 of cell #2 (same wire that was replaced before). Same noise is visible on the top and bottom strips intersecting in one point close to the middle. On Monday we opened the package and Casey tried to clean that place and we closed the package with 5 cells. On Tuesday we found the source of the noise moved by 5cm and Casey did another attempt to clean it. On Wednesday | + | - Lubomir for package #2: despite replacing sense wire 37 on the second cell, it showed a noise this time very close to the HV end (Down strip #15, Upper strip #3). On Monday we opened the package for a fourth time. During this operation, an O-ring with Apizon fall |
| − | we found again it moved by 2cm and decided to replace the wire. Casey and Dave replaced and checked the wire position and tension. Interestingly, the new wire was parallel to the old ones at <10 microns level at +/-20cm from the center. That means the strong-back didn't move since this old wire frame (#10) was strung. We looked also at the wire with a microscope at that place: tiny fiber around the wire seamed to be visible and looked darker. After the meeting we installed the last two cells of the package.
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| | == Basis of Estimate for the FDC == | | == Basis of Estimate for the FDC == |
Revision as of 18:31, 7 February 2013
February 7, 2013 FDC meeting
Agenda
- Production Construction Tracking (Dave)
- Package #2 testing (Lubomir)
- Basis of Estimate for the FDC activities cabling manhours (Lubomir, Bill, Dave)
- Corrosion tests at MePhi latest results (Lubomir)
- Engineering [1], [2], [3], [4], [5], [6] (Bill)
- Electronics (Nick)
- Tests at EEL126 FDC E-log (Beni)
- Other
