Revision as of 18:24, 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)
   • Up/Down strip asymmetry [4], [5], [6], [7], [8], [9], [10], [11]
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 looked at the ratio of the charge on the upper and down cathodes from the last run data.

Electronics

Engineering