Difference between revisions of "Minutes-5-19-2011"
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== Engineering == | == Engineering == | ||
| − | - The vibrations at Blue Crab were investigated on Saturday by Kirk Davis. He used an accelerometer connected with an analyzer and measured the vibration frequencies at different places (see the above link). On the sensor (also table, strong-back) he observed the same frequency (~39Hz) as on the AC unit and on the supporting beam, also on the walls but not on the floor. So, most likely the source is the AC coupled to the stringing table acoustically. | + | - The vibrations at Blue Crab were investigated on Saturday by Kirk Davis. He used an accelerometer connected with an analyzer and measured the vibration frequencies at different places (see the above link). On the sensor (also table, strong-back) he observed the same frequency (~39Hz) as on the AC unit and on the supporting beam, also on the walls but not on the floor. So, most likely the source is the AC coupled to the stringing table acoustically. Bill suggested putting plastic plates on the ceiling and also improving the supporting beam. Eugene insisted that first we have to check if this is the reason for the problem with the wire sensing (10-20% of the field wires are not seen by the laser) and then to try to reduce the vibrations. |
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| + | - Report from Olga (linked above) shows some contaminated spots on the filed wires. For the first report she did before, she cleaned the field wire samples ultrasonically and maybe that's why she didn't see the contamination before. It's not critical for the field wires to have some contaminated spots, also we may have to clean them with the ultrasonic cleaner before stringing. This is another possible explanation for the field wire sensing. | ||
== Electronics == | == Electronics == | ||
Revision as of 00:09, 20 May 2011
May 19, 2011 FDC meeting
Agenda
- Production (Dave)
- Cathodes
- Wire planes
- End windows: epoxy problem
- Engineering (Bill)
- Vibration measurements at Blue Crab
- Pin rail modification
- Other: field wire report from Olga
- Electronics status(Fernando, Chris)
- Chamber testing (Beni)
- Equipment for Blue Crab
- Timing with fADC125
- Other
