Difference between revisions of "Minutes-3-10-2011"
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- Dave: Today Mark Stevens and Brian Kross were at Blue Crab explaining how to cut the cathode foil. Two cuts were made using bad foils. Tomorrow they will continue with the foil gluing procedure. All the frames were inspected for mechanical tolerances. Two wire frames (out of 31) were out of specs. In one of them the o-ring groove was too deep and Bill wanted to refurbish it. The test PCB ring is ready to be laminated to the wire frame; the tooling for that is ready, as well. | - Dave: Today Mark Stevens and Brian Kross were at Blue Crab explaining how to cut the cathode foil. Two cuts were made using bad foils. Tomorrow they will continue with the foil gluing procedure. All the frames were inspected for mechanical tolerances. Two wire frames (out of 31) were out of specs. In one of them the o-ring groove was too deep and Bill wanted to refurbish it. The test PCB ring is ready to be laminated to the wire frame; the tooling for that is ready, as well. | ||
| − | - The readiness review will be on March 31 with Howard Fenker, Eugene Chudakov, Tim Whitlatch, Bruce Lenser, and Brian Kross in the review committee. Bruce wanted to have couple of weeks in advance: the specifications, drawings, and the QA plan. Bill have the assembly drawings ready by the next meeting. Dave has the QA documents. It was not clear what kind of specifications was he interested in; Eugene will talk to Bruce about that. | + | - The readiness review will be on March 31 with Howard Fenker, Eugene Chudakov, Tim Whitlatch, Bruce Lenser, and Brian Kross in the review committee. Bruce wanted to have couple of weeks in advance: the specifications, drawings, and the QA plan. Bill have the assembly drawings ready by the next meeting. Dave has the QA documents. It was not clear what kind of specifications was he interested in; Eugene will talk to Bruce about that. Bill, Dave, and Lubomir discussed tentative agenda: presentations (Overview-Lubomir, Design-Bill, Production-Dave, Recovery procedures-Bill, Tests-Lubomir), Blue Crab visit, and discussions. |
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== Electronics == | == Electronics == | ||
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- We turned the prototype chamber upside-down to investigate the problem with the top/bottom signal ratio. The HV had to be increased by ~250V to get measurable signal from the chamber. In this position the signals from the top strips are bigger than from the bottom, as it was the case before, but now the these are different cathodes. This can be explained by cathode sagging or frame deformation. Most likely the drop in the gas gain can't be explained by geometry changes and we suspect gas problems. Right after the meeting Beni measured the oxygen contamination at the exhaust tube and it was ~0.5% as before. Glenn suggested measurements in vertical position. Eugene suggested to look at the width of the 55Fe peak and compare it with what it was before. | - We turned the prototype chamber upside-down to investigate the problem with the top/bottom signal ratio. The HV had to be increased by ~250V to get measurable signal from the chamber. In this position the signals from the top strips are bigger than from the bottom, as it was the case before, but now the these are different cathodes. This can be explained by cathode sagging or frame deformation. Most likely the drop in the gas gain can't be explained by geometry changes and we suspect gas problems. Right after the meeting Beni measured the oxygen contamination at the exhaust tube and it was ~0.5% as before. Glenn suggested measurements in vertical position. Eugene suggested to look at the width of the 55Fe peak and compare it with what it was before. | ||
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| + | [http://argus.phys.uregina.ca/cgi-bin/private/DocDB/ShowDocument?docid=1668] | ||
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Revision as of 19:22, 10 March 2011
March 10, 2011 FDC meeting
Agenda
- Production
- Production status (David)
- Readiness review program (Lubomir, Dave, Bill)
- Electronics
- Status (Fernando, Chris)
- Foil production (Roger)
- Other
- Engineering (Bill, David)
- Conductive tape soldering
- New mounting template
- Other
- Chamber testing
- "Upside-down" tests (Lubomir)
- Other
Minutes
Participants: Bill, Mark, Dave, Chris, Roger, Simon, Glenn, Eugene, Beni, and Lubomir.
Production
- Dave: Today Mark Stevens and Brian Kross were at Blue Crab explaining how to cut the cathode foil. Two cuts were made using bad foils. Tomorrow they will continue with the foil gluing procedure. All the frames were inspected for mechanical tolerances. Two wire frames (out of 31) were out of specs. In one of them the o-ring groove was too deep and Bill wanted to refurbish it. The test PCB ring is ready to be laminated to the wire frame; the tooling for that is ready, as well.
- The readiness review will be on March 31 with Howard Fenker, Eugene Chudakov, Tim Whitlatch, Bruce Lenser, and Brian Kross in the review committee. Bruce wanted to have couple of weeks in advance: the specifications, drawings, and the QA plan. Bill have the assembly drawings ready by the next meeting. Dave has the QA documents. It was not clear what kind of specifications was he interested in; Eugene will talk to Bruce about that. Bill, Dave, and Lubomir discussed tentative agenda: presentations (Overview-Lubomir, Design-Bill, Production-Dave, Recovery procedures-Bill, Tests-Lubomir), Blue Crab visit, and discussions.
