Difference between revisions of "Minutes-6-11-2015"

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#* Power outage preparations
 
#* Power outage preparations
 
# Other
 
# Other
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= Minutes =
 
= Minutes =
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- Simon showed new alignment results and compared them to the results for the fall 2014 run. For the new alignment he used external (BCAL) tracking, for the old - tracking from the CDC itself. One can see that in the new results the offsets are smaller - few hundreds microns, while in the old results we there are groups of straws with offsets of ~600 microns.
 
- Simon showed new alignment results and compared them to the results for the fall 2014 run. For the new alignment he used external (BCAL) tracking, for the old - tracking from the CDC itself. One can see that in the new results the offsets are smaller - few hundreds microns, while in the old results we there are groups of straws with offsets of ~600 microns.
  
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- Curtis has seen recent results from Mike
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- Curtis has seen recent results from Mike using Millepede package: the offsets are randomly distributed, not in groups as it is in the Simon's results. Will discuss this when Mike is back.
  
 
== FDC update ==
 
== FDC update ==
  
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- Lubomir compared the efficiencies from the fall and spring run, the latter with two HV settings 2200 and 2250, there's no visible change in the efficiency meaning no need to work at 2250V. Some of the bad channels in the third package started working by unknown reasons (last figure).  
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- Lubomir analyzed the ratio of the charge on the upper and down cathodes from the last run data.
  
 
== Electronics ==
 
== Electronics ==
  
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- Fernando proposed to start discussing if we can turn off some of the equipment during till the next run. CDC will take cosmics, then we will decide.
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== Engineering ==
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Revision as of 18:23, 11 June 2015

June 11, 2015 Drift Chamber meeting

Connection

  1. Instructions for Bluejeans meeting connection
  2. Meeting ID: 290664653
  3. To join via a Web Browser, go to the page [1] https://bluejeans.com/290664653.

Agenda

  1. CDC analysis update (Beni, Simon)
    1. Alignment: Fall'14: [2] Spring'15:[3]
  2. FDC analysis update (Lubomir)
  3. Electronics
  4. Engineering
    • Power outage preparations
  5. Other

Minutes

Participants: Curtis (CMU), Sean (NU), Eugene, Luke, Dave, Chris, Nick, Simon, Beni, Fernando, and Lubomir (JLab).

CDC analysis update

- Simon showed new alignment results and compared them to the results for the fall 2014 run. For the new alignment he used external (BCAL) tracking, for the old - tracking from the CDC itself. One can see that in the new results the offsets are smaller - few hundreds microns, while in the old results we there are groups of straws with offsets of ~600 microns.

- Curtis has seen recent results from Mike using Millepede package: the offsets are randomly distributed, not in groups as it is in the Simon's results. Will discuss this when Mike is back.

FDC update

- Lubomir analyzed the ratio of the charge on the upper and down cathodes from the last run data.

Electronics

Engineering

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