Analysis Day 2018JUL16

Agenda

• Welcome -- 9:00am

Session: Calibrations

• BCM Calibration-- Mike
• Raster Calibration -- Tyler H.
• Calibration Run Lists -- Jason
• Endcap Subtraction -- Tong
• Pedestal Stability-- Jason. prl2 pmt10
• Data Quality Checks -- Mike

Session: Systematic Effects

• December Boiling-- Tong
• March Boiling -- Mike
• Multi-track and No-track events -- Hanjie
• 3H Decay -- Tyler K
• Radiative Corrections -- Hanjie
• Positrons (slides) -- Tong

Session: Tools

• Event Viewer -- Tyler K
• Batch Replays -- Tyler H

Session: Wrap-up

• Priorities and Timeline Redmine Task List -- Evan

Minutes

SESSION: Calibrations

• Mike- BCM Calibrations-
  • use dnew in standard analysis
  • use constant calibration for entire MARATHON run
  • Javier- why is unew low for calibration #2?

• Tyler H- Raster Calibration-
  • Javier- Did something in the beamline really change? ask the expert
  • Javier- Does the carbon hole image get fuzzier with higher angle due to multiple scattering within the target?
  • Need to make a plot for stability of current-to-mm calibration over the whole MARATHON run
  • check BPM documents to find raster calibration stuff

• Jason- Runlists-
  • get runlist info in mysql, add mysql runlist query functions to TriTools

• Tong- Endcap Contamination-
  • downstream vertex-z moving: caused by mispointing, raster calibration, optics?

• Jason- Pedestal Stability-
  • Hanjie- FADC class for S0, S2, and Cer calculates pedestal values event-by-event

• Mike- Data Quality Checks-

SESSION: Systematics

• Tong- December Boiling-
  • Talk to Meekins: are we surprised that the boiling is non-linear?
  • check target-z dependence of boiling

• Mike- Boiling-
  • why are the events from the gas tilted (high at upstream, lower at downstream)

• Hanjie- No-track/Multi-track-
  • use assumption of constant cosmic rate, predict zero track efficiency effect vs kinematic

• Tyler K- Tritium Decay-
  • calculate effect of uncertainty in contamination factor on uncertainty in yield ratio

• Hanjie- Radiative Corrections-
  • Check that you are actually using scattering angle, not just horizontal angle, for the radiative corrections
  • Zhihong: bin centering- use simulation with radiative correction included
  • Javier: bin centering- cut to stay away from edges, use model to get dependence of cross-section on x, Q^2
  • Makis: don't trust edge bins in x, plot each bite separately to look for discrepancies
  • Zhihong: perhaps make tighter acceptance cuts on theta and phi
  • check which model used in Dave Gaskells code

• Tong- Positrons-
  • do data quality checks on Helium kin3 positron runs

SESSION 3

• Tyler K- Event Viewer-
• Tyler H- Batch Replays-
  • clean up old replay directories, if any still exist

SESSION 4

• Evan- Discussion: Moving Forward-
  • Priority 1:
    • Anything that changes the database/code for pass2
      • finalize calibrations (BCM, raster, beam energy, optics, etc.)
  • energy and angle higher-order corrections
  • optics matrix depends on accurate angle central value and mispointing numbers
    • decision on beam trip cut handling (cutting out ramp-up?)
    • Finalize Data Quality Checks
      • run lists
      • all suspicious runs identified and investigated
  • Priority 2:
    • Systematics Studies
      • radiative corrections
      • tritium decay
      • positrons
      • endcap contamination
      • boiling
      • acceptance cuts
      • zero-track and multi-track events (decision: use only one-track events)
    • priority ordering (Makis)-
      • acceptance cuts (need to set standard cuts (PID: Hanjie track study))
      • endcaps
      • boiling
      • positrons
      • tritium decay
      • binning
      • radiative corrections