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

Thu 3/11/2021 2pm


  1. Tracking
  2. Detector related reports
  3. GEM-TRD
  4. Other


  1. Tracking
    • Simon will implement the FDC geometry from the survey in the MC trying to reproduce the wiggles in the pull distributions that Alex observed.
  2. Detector related reports
    • FA125
      • In the last meeting Naomi observed that at the start of run 72932 the roc25 slot 6 fadc was writing out events which were probably from the previous run. Since then she recalled the files for 72931 and found that the entire crate lost sync with the others part way through the run, and slot 6 was sometimes in sync with that, sometimes not. Also files 62 & 63 contained an event with a missing CDC pulse data word. See logbook entry and data error. Unfortunately the itrigger values are not 100% reliable, we need this fixed in the firmware to use it as a diagnostic. Sergey asked for a separate meeting with Naomi and Cody.
    • CDC
      • Lubomir asked if Naomi had any new ideas as to what might be the cause of the efficiency mismatch between data and MC in spring 2018. The answer is No. There are a number of studies in the works which might provide some useful information - see the issue.
      • Previous presentations are at May 2019 MC workshop and dE/dx overlay for many runs
    • FDC
      • Keigo is implementing Sean's recommendation in the Ks->pi+pi- alignment procedure.
  3. GEM-TRD
    • Measurements of the FDC gas composition continue; in a week we will be sensitive to the Oxygen contamination at ~100ppm level.
    • We are finalizing with the UVA people the specifications for the large-size GEM-TRD prototype. The outer frame will be 75x75 cm^2 while the active area is 75X55 cm^2 with x and y pad-like strips (1.9 mm pitch) with flex connections to the pre-amps at the shorter side.
  4. Other