Revision as of 14:28, 31 August 2016

August 11, 2016 Drift Chamber meeting

Connection

Detector updates
- CDC update (Naomi/Mike/Beni)
  - CDC thermocouple module switch (Naomi) logbook entry
- FDC update (Simon/Lubomir/Alex)
  - Particle gun MC: momentum resolution comparison with/without using FDC drift times (Simon):
  - RD: Effect on Efficiency (Alex A.)
  - CDC and FDC tracks with GENFIT examples: track 48 zy, track 48 xy, track 45 zy, track 45 xy, track 42 zy, track 42 xy (Lubomir)
NIM Papers
- svn ls https://halldsvn.jlab.org/repos/trunk/publications/GlueXCDC
- svn ls https://halldsvn.jlab.org/repos/trunk/publications/GlueXFDC
fADC125 meeting (Naomi, Cody, Beni) fa125 occupancy (corrected)(Beni was right)
Other

Participants: Sean (NU), Naomi, Curtis (CMU) Eugene, Chris, Luke, Beni, Alexander A., Simon, Sergey, and Lubomir (JLab).

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 == CDC ==
-- In the analyses meeting Mike reported already [https://halldweb.jlab.org/wiki/images/b/b5/MStaibCDCEfficiencyS16.pdf his studies] on the CDC efficiency.
+- Naomi found a problem with the thermocouple that monitors the CDC temperature - see the log entry above.
-- 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.
 == FDC ==
+- Simon used simulations to demonstrate the advantage of adding the drift time information to the FDC track reconstruction - momentum resolution improves by a factor of sqrt(2) at high momenta. At low momenta multiple scattering dominates - see plots above. Can't wait to see the same improvement with real data.
+-
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