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| | = Minutes = | | = Minutes = |
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| − | Participants: Naomi (CMU) Eugene, Tim, Dave, Fernando, Mike, Chris, Nick, Simon, Beni, and Lubomir (JLab). | + | Participants: Curtis, Naomi (CMU) Eugene, Fernando, Dave, Mike, Chris, Nick, Simon, Beni, and Lubomir (JLab). |
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| | == Gas issues == | | == Gas issues == |
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| − | - We had very long discussions what to do with the CDC leakage. Everybody agrees that CDC can't be operated like this and the leak has to be fixed. Different proposals: start removing the HVB cards and check with the sniffer the holes at the cheese plate (Beni, Nick, Fernando), check for leaks at the downstream mylar window with a tube on the sniffer (Dave), take some cosmic data overnight, if the leak is at the cheese plate the straws will still have some gas flow and the data should be OK (Lubomir). | + | - CO2 was monitored for two weeks. Two sets of measurements are shown in the above plots. First plot: starting with certified gas (60% CO2) in EEL126 then moving the sensor (without disconnecting from the laptop) to the Hall and connecting |
| − | | + | |
| − | - By the time I'm writing the minutes, Nick removed all the cables at the front and a portion of the HVB cards at the bottom. Thus, Mike and Nick were able to sniff the entire cheese plate without finding anything localized. The place with the maximum beeping is at the bottom, between BCAL and CDC, but the gas is heavier than air so it may come from anywhere. On Friday afternoon Tim and Eugene decided to pull the CDC out of the bore. Target people are preparing the target. On Monday morning it will be craned to the floor and the CDC will be pulled out.
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| − | | + | |
| − | - The CO2 sensor came back from repair. We calibrated it with 60/40 CO2/Ar certified mixture in the EEL126, and then started monitoring the CO2 in the first FDC package. Results are linked: some variations for 20 hours, maybe related to the gas temperature, has to be monitored for longer time.
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| − | | + | |
| | == Electronics == | | == Electronics == |
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Revision as of 20:26, 8 March 2015
March 5, 2015 FDC+CDC meeting
Connection
- Instructions for Bluejeans meeting connection
- FDC meeting ID: 290664653
- To join via a Web Browser, go to the page [1] https://bluejeans.com/290664653.
Agenda
- Gas issues
- CDC update (Mike)
- FDC update (Lubomir)
- Electronics (Fernando, Cody, Chris, Nick)
- Engineering (Dave)
- Other
