Difference between revisions of "Minutes-7-15-2010"
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= Minutes = | = Minutes = | ||
Participants: Eugene, Fernando, Glenn, Roger, Mark, Casey, Beni, Simon, and Lubomir. | Participants: Eugene, Fernando, Glenn, Roger, Mark, Casey, Beni, Simon, and Lubomir. | ||
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== Engineering === | == Engineering === | ||
| − | - Cathode foils: Roger showed us a plastic cylinder and a paper sample he received from the company to be used for transporting the foils. Mark said this paper should work (he had bad experience before with a sticky on one side paper). Fernando and Glenn suggested possible improvements: placing caps on the cylinder ends, using two cylinders with the foil in between. Roger will further communicate with the company to improve the packaging, while Mark and Casey will exercise packing using the company's paper. Roger is also checking the Gerber files and will send them soon to the company for quotation. | + | - Cathode foils: Roger showed us a plastic cylinder and a paper sample he received from the company to be used for transporting the foils. Mark said this paper should work (he had bad experience before with a sticky on one side paper). Fernando and Glenn suggested possible improvements: placing caps on the cylinder ends, using two cylinders with the foil in between. There are also other questions that need to be iterated with the company, like how many foils will be rolled on one cylinder. Roger will further communicate with the company to improve the packaging, while Mark and Casey will exercise packing using the company's paper. Roger is also checking the Gerber files and will send them soon to the company for quotation. |
| − | - | + | - We have now two (one of each type) new design cathode frames machined in our machine shop. There was a problem with the vacuum fixture during the machining of one of the frames. According to Bill the procedure will change and this will not reoccur. Mark and Casey will prototype the new flapping design (to improve the grounding), using the foils that we have now. Roger will give them drawings to cut the flap according to the new design. Mark and Casey will also improve the procedure of gluing the foil to the transfer ring so that there's extra length to be used for the flaps. |
== Full-scale prototype test results == | == Full-scale prototype test results == | ||
| − | - | + | - Beni explained the procedure he used to calculate the wire resolution. The top two wire planes are read out, which wires are parallel. He plots the difference of the distances calculated from the drift times of the two layers as a function of the angle alpha (a drawing explaining this is attached above). He extracts the resolution for angles close to zero and gets about 200microns. The resolution is getting better if applying angle corrections. The dependence of the corrected difference |
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- To measure the oxygen contamination we need a pump at the end of the oxygen sensor, as discussed last time. The problem is that the pressure there should | - To measure the oxygen contamination we need a pump at the end of the oxygen sensor, as discussed last time. The problem is that the pressure there should | ||
Revision as of 17:59, 15 July 2010
July 15, 2010 FDC meeting
Tentative Agenda
- Production
- 727 B.C. status
- production planning
- wire stringing design
- rohacell ring production
- Electronics: update (Fernando)
- Engineering
- Cathode foil: update (Roger)
- Cathode frame prototyping
- Full-scale prototype tests
- cosmic test results (Beni) FDC Log Book, pages 505
- oxygen contamination measurements Beni's scheme
- Other
