Difference between revisions of "Minutes-1-17-2013"
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- Lubomir: package #2 being flushed with gas, but showing somewhat lower pressure, 0.39-0.44 inch H20, than we had for the other packages, 0.50-0.54, at the same conditions (input flow of 220sccpm, and same position of the rotameter (~95 units) that takes the gas to the O2 analyzer. No gas leakage was found. Changing the manifold to the one used in package #1 didn't affect the pressure. | - Lubomir: package #2 being flushed with gas, but showing somewhat lower pressure, 0.39-0.44 inch H20, than we had for the other packages, 0.50-0.54, at the same conditions (input flow of 220sccpm, and same position of the rotameter (~95 units) that takes the gas to the O2 analyzer. No gas leakage was found. Changing the manifold to the one used in package #1 didn't affect the pressure. | ||
| − | - Redundant components: we decided to | + | - Redundant components: we decided to produce six spare cells and build a full spare package. The package will not have pre-amp cards (need 132 and have about 20-30 spares) and therefore cooling tubes. We are not going to do the grounding, for that we prefer to have the cards in place to make sure we don't block the access to the connectors. Also we are not going to do the external HV wiring. Thus, if we need we can replace a package from the detector with the spare one, using the cards and HV connectors together with the wires from the original package. We decided to deaden the wires with the larger diameter (7.8cm) so that we can replace any package. We have 7 wire planes to choose from to build six cells. We have also enough cathode frames except that one has to be converted from type 2 to type 1, i.e. milling the O-ring groove. Dave: we will need also two spacer rings and short HV cables. Eugene asked Dave to estimate the material and extra labor (about 5 manweeks) needed to build two additional cells. |
== Basis of Estimate for the FDC == | == Basis of Estimate for the FDC == | ||
Revision as of 13:05, 18 January 2013
January 17, 2013 FDC meeting
Agenda
- Production Construction Tracking (Dave)
- Production status
- Plans for spare parts [1]
- Basis of Estimate for the FDC activities ,guideline (Lubomir, Bill, Dave)
- Engineering (Bill)
- Electronics (Chris, Nick)
- Tests at EEL126 FDC E-log (Beni)
- Fourth package tests FDC E-log Entry 101
- Other
Minutes
Participants: Eugene, Glenn, Dave, Bill, Simon, and Lubomir.
Production
- Dave: Last production package (#2) assembled! Redundant components: working on three more cathodes. Casey and Dave strung wire plane #31. Anatoly finished with the HV caps on #32, now also ready for stringing.
- Lubomir: package #2 being flushed with gas, but showing somewhat lower pressure, 0.39-0.44 inch H20, than we had for the other packages, 0.50-0.54, at the same conditions (input flow of 220sccpm, and same position of the rotameter (~95 units) that takes the gas to the O2 analyzer. No gas leakage was found. Changing the manifold to the one used in package #1 didn't affect the pressure.
- Redundant components: we decided to produce six spare cells and build a full spare package. The package will not have pre-amp cards (need 132 and have about 20-30 spares) and therefore cooling tubes. We are not going to do the grounding, for that we prefer to have the cards in place to make sure we don't block the access to the connectors. Also we are not going to do the external HV wiring. Thus, if we need we can replace a package from the detector with the spare one, using the cards and HV connectors together with the wires from the original package. We decided to deaden the wires with the larger diameter (7.8cm) so that we can replace any package. We have 7 wire planes to choose from to build six cells. We have also enough cathode frames except that one has to be converted from type 2 to type 1, i.e. milling the O-ring groove. Dave: we will need also two spacer rings and short HV cables. Eugene asked Dave to estimate the material and extra labor (about 5 manweeks) needed to build two additional cells.
