Tracking-7-29-2021
From GlueXWiki
- Instructions for Bluejeans meeting connection
- Meeting ID: 290664653
- To join via a Web Browser, go to the page [1] https://bluejeans.com/290664653.
Thu 7/15/2021 2pm
Agenda
- Tracking
- Run preparations
- FA125
- CDC
- FDC
- GEM-TRD
- Other
Minutes
- Tracking
- Simon reported on modifications to how a global tilt of the entire FDC is handled in the reconstruction in a new github branch
- He studied the impact of generating single pion tracks with a tilted FDC by reconstructing with the nominal geometry, where distortions in the pulls of px,py,pz and x,y,z as a function of φ can be seen, and with the revised code using the tilted XML, where the distortions are more-or-less eliminated.
- He repeated the exercise for ρ events, with comparable results.
- Keigo reported on the sensitivity check of MilleKs for rotation parameters of each plane. MilleKs is insensitive to rotation of FDC plane #20, but sensitive to that of #5, #19, #21.
- Package-by-Package alignment was done using straight track data and MilleFieldOff. The results are comparable to MilleKs results, and so small that they cannot explain phi dependence of the pull distributions.
- Simon reported on modifications to how a global tilt of the entire FDC is handled in the reconstruction in a new github branch
- Run preparations
- FA125
- Cody tested a new firmware version but it did not go well so he reverted the firmware to the old version.
- CDC
- Beni fixed many problems with preamps, LV not connected, etc, and now all the channels look ok. He is waiting for BCAL to be ready to take cosmics.
- Naomi presented an outline of how a gain AI could be used to maintain stable gain for the CDC, and showed that the changes in HV needed are small (+/- 15V) and the impact on drift time is small but beneficial.
- FDC
- FA125
- GEM-TRD
- Other