Difference between revisions of "Minutes-8-19-2010"
From GlueXWiki
| Line 28: | Line 28: | ||
- David made a list of materials and equipment needed for the FDC production, totaling $120K. We have to find a way to include this into the FDC budget. We discussed the main items: epoxy, tables, additional transfer ring, microscope, ... Tim suggested starting with smaller quantities and then buying/manufacturing depending on the needs. Eugene wanted to have these numbers spread over the years. Communicate with David to include other stuff in the list, if necessary. | - David made a list of materials and equipment needed for the FDC production, totaling $120K. We have to find a way to include this into the FDC budget. We discussed the main items: epoxy, tables, additional transfer ring, microscope, ... Tim suggested starting with smaller quantities and then buying/manufacturing depending on the needs. Eugene wanted to have these numbers spread over the years. Communicate with David to include other stuff in the list, if necessary. | ||
| − | - Mark and Casey prepared a list of possible defects for the FDC production. Eugene asked | + | - Mark and Casey prepared a list of possible defects for the FDC production. Eugene asked about the cathode soldering technique and the probability for failure. Bill is getting tomorrow the magic soldering tape (from 3M). We will have: G10 frame, cathode foil, magic tape and then the flex that has to be heated to 400F. Bill discussed the tooling needed for this technique: most likely we have to make it. |
| − | + | ||
== Electronics == | == Electronics == | ||
| + | - Fernando presented Christopher Stanislav who is testing the PCBs. No problems with the first article PCBs. The Gerber files were modified to fix the coating problem: some of the vias were not coated. We will have all the PCBs ready by mid September. Bill: when we can have the first article PCBs to be used in the first wire frames? Fernando: probably end of September; working now on the procurement for stuffing. | ||
| + | |||
| + | - | ||
- Fernando reported on the acceptance test of the first article PCBs (see attached document). Overall the quality was good, the PDBs are accepted and the production should continue as scheduled. There were few exceptions, some of them minor, some easily fixable: on some of the boards the vias were not filled as required. One important issue was discussed: the material used in the boards is FR-4, but we required g10. We have to find out what's wrong with FR4 (water absorption, bromine content?) and see if we really need g10. Fernando will continue with electrical tests. After the meeting we went to F117 where Fernando showed the boards, their quality is certainly higher than of the boards used in the full-scale prototype. | - Fernando reported on the acceptance test of the first article PCBs (see attached document). Overall the quality was good, the PDBs are accepted and the production should continue as scheduled. There were few exceptions, some of them minor, some easily fixable: on some of the boards the vias were not filled as required. One important issue was discussed: the material used in the boards is FR-4, but we required g10. We have to find out what's wrong with FR4 (water absorption, bromine content?) and see if we really need g10. Fernando will continue with electrical tests. After the meeting we went to F117 where Fernando showed the boards, their quality is certainly higher than of the boards used in the full-scale prototype. | ||
Revision as of 16:28, 19 August 2010
August 19, 2010 FDC meeting
Tentative Agenda
- Production
- Clean room requirement changes: Ron Bartek's suggestions
- Equipment/materials needed for the production David's list
- Defect possibilities Mark&Casey's list
- Electronics (Fernando)
- update on first article PCBs
- other
- Engineering
- Cathode foil: sole source procurement status (Roger) form, PR 294196 questions
- Wire stringing update (Bill)
- Other: granite tables, update from UVA, returning the tent in 126 to HallA
- Full-scale prototype tests: update (Beni)
- Other: talks at the collaboration meeting
