Difference between revisions of "Minutes-1-22-2015"
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- At least the CO2 content will be known soon. We have received a CO2 sensor (0-100% range) that is based on UV light absorption by the CO2 molecule. Needs calibration, will use a certified Ar/CO2 bottle ~40/60, and pure CO2. | - At least the CO2 content will be known soon. We have received a CO2 sensor (0-100% range) that is based on UV light absorption by the CO2 molecule. Needs calibration, will use a certified Ar/CO2 bottle ~40/60, and pure CO2. | ||
− | - Naomi showed her latest results (linked above) from CMU using the prototype. | + | - Naomi showed her latest results (linked above) from CMU using the prototype. She used 50/50 55/45 and 60/40 Ar/CO2 gas mixtures. There's an big increase in the gain between 55/45 and 60/40 but not that much between 50/50 and 55/45, If compared with the JLab results with no filed the mixture must be between 55/45 and 60/40 if there's no alcohol. Also the JLab results correspond to tracks at much smaller angles as compared to the almost perpendicular cosmic muons, which should also be corrected for. |
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== FDC update == | == FDC update == | ||
− | - Vlad | + | - Vlad showed some studies of the systematics of the gain calibration procedure, comparing results using all the hits, and only those that are part of reconstructed tracks for the fourth package. The are statistically very similar. The channels with correction coefficient >1 (assumed to be "bad") show some differences (up to 50%) when using the two methods. |
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== Electronics == | == Electronics == |
Revision as of 19:40, 23 January 2015
January 22, 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
- Collaboration meeting agenda
- Gas puzzle
- CDC update (Mike)
- FDC update
- Gain calibration (Vlad)
- Electronics (Fernando, Cody)
- HVB refurbishment (Nick, Chris)
- Engineering (Dave)
- Other