From GlueXWiki
Jump to: navigation, search

July 14, 2016 Drift Chamber meeting


  1. Instructions for Bluejeans meeting connection
  2. Meeting ID: 290664653

Headline text

  1. To join via a Web Browser, go to the page [1] https://bluejeans.com/290664653.


  1. Detector updates
  2. NIM Papers
  3. fADC125 meeting (Naomi, Cody, Beni)
  4. Other


Participants: Sean (NU), Mike (CMU) Eugene, Cody, Luke, Beni, Alexander A., Simon, and Lubomir (JLab).


- In the analyses meeting Mike reported already his studies on the CDC efficiency.

- Beni: Nick and Chris are cleaning/replacing the CDC HVB that had some issues during the last run due to some dust on them. We discussed possible origins of this dust: coming from the cooling tubes, air, or sucked by the magnetic field.


- Simon showed first plots about implementing the drift time in the FDC tracking.

- Lubomir studied the magnetic field effects with Garfield and showed that the effect of the avalanche deflection along the wire is equivalent to a wire rotation (of about 10deg for our field) w.r.t. avalanche position. The effect on the time-to-distance relation is equivalent to about 10% increase in the time scale.

- Lubomir showed GENFIT results about the FDC resolution in magnetic field (all results so far presented were without magnetic field): there's strong dependence on momentum and is better than 200 microns at high momenta. There's more work needed on the alignment as seen from some systematics in the residuals shown above.