[Sbs_software] GEP/SBS software meeting tomorrow, 10:30 AM

[Andrew Puckett]

Hello all,

Let’s resume our software meeting at the usual time of 10:30 AM tomorrow:

Agenda :


  *   Discussion of effect of Cu “filter” thickness/placement on GEM background and SBS resolution (Kip and all):

     *   How much background reduction is possible with acceptable impact on resolution?
     *   Discussion: what is the maximum acceptable impact on SBS resolution/efficiency that we can tolerate?
  *   Summary of progress in trigger simulations/analysis and discussion of next steps (Andrew and students):
     *   Trigger analysis of simulated elastic ep events—discussion of bug fixes/speed improvements
     *   Timeline for updating “generic” trigger analysis script to analyze PYTHIA/inelastic/elastic/other event types for rate estimation
        *   Limitations of PYTHIA at lower energies.
        *   Estimating the “missing” physics contributions to the rates without double-counting
     *   How to organize all the mapping information and lookup tables?
     *   What additional information is needed for practical implementation in experiment?
     *   What is the most convenient format of the information for DAQ configuration purposes?
  *   (Time permitting): Discussion of calibration and commissioning strategies for calorimeters and trigger validation:
     *   Validation of trigger logic—verification of coincidence trigger efficiency versus ECAL and HCAL threshold via elastic yield comparison to Monte Carlo at low beam current
        *   Loose versus tight coincidence lookup, lookup tables for different kinematics and magnetic field settings
        *   GEM tracking and SBS optics need to be in “good enough” shape for clean elastic ep reconstruction with high efficiency to validate trigger.
        *   Comparison to Monte Carlo yield has to be done carefully due to effect of CH2 analyzer on polarimeter efficiency.
        *   Prescaled ECAL singles triggers at low beam current to verify HCAL efficiency?
     *   Threshold calibration, rates versus threshold: what happens if/when the trigger rates are higher than we expect and we become DAQ-rate limited below the planned beam current?
     *   Software readiness for rapid commissioning:
        *   Calorimeter calibrations: timing and energy. Hardware/firmware/software-level gain matching. With cosmics and with beam.
        *   Support scripts for rapid calorimeter calibration. What do we have? What do we need?


We’ll meet on Zoom as usual:

https://jlab-org.zoomgov.com/j/1604707668?pwd=NW5BZFByampRb2ZMemtqdTNpZTNiZz09

Agendas and minutes are being collected here:

https://sbs.jlab.org/wiki/index.php/GEP_software_meeting_agendas/minutes

See you tomorrow!

Best regards,
Andrew

Andrew Puckett
Associate Professor, Physics Department
University of Connecticut
196 Auditorium Road, Unit 3046
Storrs, CT 06269-3046
Office phone: (860) 486-7137
https://puckett.physics.uconn.edu
puckett at jlab.org<mailto:andrew.puckett at uconn.edu>
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