Difference between revisions of "Minutes-10-31-2013"
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== Installation == | == Installation == | ||
| − | - The results from the survey of the FDC on the floor in the Hall are attached (still preliminary). The main conclusions: flatness of all the packages is OK (max deviation from the best fitted plane is 0.022"=0.56 mm). The centering of all the packages is perfect. The main concern is that the tilt (pitch and yaw) of the packages changed if compared to the Blue Crab measurements. | + | - The results from the survey of the FDC on the floor in the Hall are attached (still preliminary). The main conclusions: flatness of all the packages is OK (max deviation from the best fitted plane is 0.022"=0.56 mm). The centering of all the packages is perfect. The main concern is that the tilt (pitch and yaw) of the packages changed if compared to the Blue Crab measurements, which means FDC is flexible to this extend. Mostly the first and the last packages had deviations up to 0.66 mm. We just need to know the tilts, but the question is what will happen when FDC is moved inside the magnet. Eugene's point: it's very difficult to do tilt corrections using the beam data, we need to know the z positions better than 0.5mm and most importantly be sure it doesn't change when inserting the FDC. |
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| + | - Therefore Tim, Bill, Tom proposed (and everybody agreed) to try to do survey when the FDC is inside in final position connected with cables. Most of the discussions: if it is possible, and how to do it. For the outer packages everybody agrees it is doable. For the inner packages there must be different solutions, but for now Bill will start looking for non-magnetic targets to be installed in points visible from the sides when the FDC is inside the magnet. | ||
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| + | - The short term plan: since we think the survey of the FDC in final position is doable we can go ahead and put FDC back on the platform (on Friday). Then we will move it in and out of the magnet and do the survey in both positions. After that we can start cabling. | ||
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== Engineering == | == Engineering == | ||
Revision as of 17:16, 31 October 2013
October 31, 2013 FDC meeting
Agenda
- Installation [1]
- FDC survey and rail alignment (Tim, Bill)Survey results_1, Survey results_2
- Engineering (Bill)
- Electronics (Chris, Nick)
- Tests in EEL126 FDC E-log (Beni)
- New F1TDC
- Other
