JEF meeting, November 4, 2022

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Meeting time and location:

  • 9:30 am EST (JLab time) remote only
  • Zoom meeting ID: 161 050 9142 Passcode: 004965

Agenda

  • Simulations/Analysis
    • Photon reconstruction (Azizah)
  • Preparation for the FCAL2 installation (coordination with Tim's group) -- Sasha
  • Light Monitoring System -- Arshak (SORRY, I might not be able to attend meeting in person, because of my owl shift)
    • 2_dimensional plot for plexi uniformity tests, I have scanned 5 lines {X0(center); X0(+-)20cm, X0(+-)39cm; Y0(center); Y0(+-)10cm, Y0(+-)19cm} for each X(80cm) and Y(40cm) directions. From this plot it can be easily seen that on the corners and edges the light amount is higher than on the central part, for the corners part the issue is solved by just removing the fibers which was attached exactly on the corners, for the edges still the plan is to attach optical attenuator to reduce the light amount https://userweb.jlab.org/~aasatury/Fcal_LMS/2d_1.gif
    • Cosmic tests setup for cross-talks
    • To check the cross-talks between modules, it's been constructed 3x3 matrix from PBWO4 blocks, also for this tests i made the same shape plexi as the actual one with smaller dimensions (62x62mm^2) which will cover the front face of the prototype. by the following link it is only the setup pictures. The plan is: 1) check with cosmics, 2) develop LED+Fiber setup (respectively to small dimensions) and trigger from LED, and final test if we will still need it is 3) move the setup to the hall and test it under beam conditions. I'll keep you updated as soon as there will be some good results. I will need to calibrate the modules, with more statistics to be able to continue cross talk tests see picture "cosmic_results.png" under the following link. https://userweb.jlab.org/~aasatury/Fcal_LMS/cosmics/