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Kaon-LT Experiment »

Analysis Tasks » History » Revision 62

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Richard Trotta, 07/08/2020 04:23 PM

Analysis Tasks

Fall 2018/Spring 2019 Run Completed
Calibrations Ongoing
Efficiencies and offsets Ongoing
First iteration of cross section On deck
Fine tuning cross section iteration To Do
Form factor extraction To Do

This is a summary page with the progress of the KaonLT experiment. Above is a quick outline of our current progress. Below are tasks assigned to members of the group. Anyone who is part of the group may contribute to a task with suggestions and/or updates on progress. Please contact the assignee on a task-by-task basis for any queries. Anyone with general questions can contact Richard Trotta ().

Ongoing [Calibrations] [Efficiencies and offsets]

Timing windows and reference times

  • Richard/Stephen
  • This was completed for hodoscopes, drift chambers by Richard/Stephen. Every HMS/SHMS channel needs to be re-done for the new hcana code.
  • Status: Ongoing

RF time for SHMS PID

  • Stephen
  • 1-Apr-2020 Update
    • Still need to set RF gates for each particle type, check offsets for other settings.
  • Status: Ongoing

BCM calibrations

  • Fall 2018-Spring 2019
    • BCM1,2 are stable, have a small nonlinearity >60uA that remains to be
      calibrated
  • Summer 2019
    • BCM1,2 both okay, including small nonlinearity corr.
  • Status: Ongoing for Fall-Spring. Completed for Summer

Beam Energy calibrations

  • Mark Jones
    • This page incorporates May/2019 problem fix that caused to give wrong
      beam energies
  • Status: Completed

SHMS and HMS Optics Improvements

  • Mark Jones
  • SHMS
  • HMS, unsure
  • Status: Ongoing

Initial run tables

  • Run tables from shift workers posted on Redmine. Has anyone gone through this to fix erroneous entries?
  • Status: Ongoing

Calorimeter

Aerogel

  • Vladimir/Richard
  • Redmine lists calibration completed by Vladimir. Need a link to the report. Cuts, PID analysis, efficiencies, not yet done.
  • Status: Ongoing

HGCer

  • Garth/Vijay
  • New calibrations almost done. Report in progress. A position dependent efficiency for pi+ and K+ will have to be implemented. This is not yet started.
  • Status: Ongoing

HMS Cer

HMS+SHMS DC

  • Stephen/Richard
  • HMS+SHMS
  • Status: Ongoing

SHMS DC

  • Richard/Stephen
  • Status: Ongoing

Hodoscope

  • Vijay/Ali
  • Status Completed

Efficiencies

Tracking To Do
Trigger To Do
PID HMS cer To Do
HMS cal To Do
SHMS aero To Do
SHMS cer To Do
SHMS cal To Do
CPU LT To Do
Electronic LT To Do
COIN time To Do
Missing Mass To Do

Python analysis scripts

  • Richard/Stephen
  • 1 , 2
  • Status Completed

SHMS tracking algorithm optimization and efficiencies.

EDTM

  • Richard
  • This has been looked at by various people. Need links to documentation.
  • Dave Mack Studies
  • Status: Ongoing

Luminosity

  • Richard/Ali/Vijay
  • Carbon luminosity scans versus current and rate
    • Need to check if the various luminosity scans give consistent results. HMS singles: partially done by Richard SHMS singles: partially done by Richard. All students need to repeat this work, particularly with new version of hcana.
  • Need to check if the various luminosity scans give consistent results
  • Peter Bosted has looked in detail at our data, leading to significant improvements to hcana. We need to repeat his studies for ourselves
  • Status Ongoing

On deck

Check stability of cointime peak

  • ???
  • In Fpi-2 it drifted with TDC temperature and needed to be adjusted on a run-by-run basis to within 200 ps.
  • Initial checks so far indicate the peak is stable. Cointime resolution will be poorer in fall 2018 run due to DAQ cabling issue. Mark has partial software fix that we need to be sure is implemented.
  • Status On deck

Elastics

  • Richard/Ali/Vijay
  • Initial Heepcheck offset fitting to get corrected E, E', theta'.
  • Status On deck

Initial ep elastic cross-section checks

  • Richard/Ali/Vijay
  • Singles cross-sections, HMS and SHMS. SHMS delta scans (only peak position checked so far, stability of normalized yield ratio not yet checked). Coin ep cross-sections.
  • In Fpi-2, determing the correct proton absorption correction for normalized required some literature review and other digging.
  • Status On deck

Heepcheck offsets

  • ???
  • Check that Heepcheck offsets produce consistent p(e,e'K+)L, p(e,e'pi+)n p(e,e'p)omega missing masses.
  • Status On deck

First iteration of cross section

  • Status On deck

Completed

Replays

FULL REPLAY 1 of data, with new calibrations. Status Ongoing

  • This replay should include all new kinematic offsets, better timing and PID calibrations, as well as Mark's most recent HMS and SHMS matrix elements.
  • Quality control rechecks with new replay:
    • carbon luminosity scans are flat vs. current and rate
    • LH2 luminosity scans are flat vs. current and rate
  • HMS saturation corrections?
  • Final investigation of SHMS acceptance, optimize acceptance cuts based on sieve-slit run analysis, agreement with single-arm MC.
    • Compare data and simulation plots of SHMS yfp,ypfp for various ytar,delta bins to identify inconsistencies.
  • Trigger blocking studies.
    • Are extra factors needed to correct for missing FADC reference times, or any other DAQ related effects? Initial info from Peter Bosted indicates this is likely to be the case.
  • Recheck Heep singles and coin yields to identify and fix problems.
  • Stability checks. Need some scripts to look at invariant mass vs run number, etc., for pi+/K+/p channels.

FULL REPLAY 1 of data, with new calibrations. Status Ongoing

  • This replay should include all new kinematic offsets, better timing and PID calibrations, as well as Mark's most recent HMS and SHMS matrix elements.
  • Quality control rechecks with new replay:
    • carbon luminosity scans are flat vs. current and rate
    • LH2 luminosity scans are flat vs. current and rate
  • HMS saturation corrections?
  • Final investigation of SHMS acceptance, optimize acceptance cuts based on sieve-slit run analysis, agreement with single-arm MC.
    • Compare data and simulation plots of SHMS yfp,ypfp for various ytar,delta bins to identify inconsistencies.
  • Trigger blocking studies.
    • Are extra factors needed to correct for missing FADC reference times, or any other DAQ related effects? Initial info from Peter Bosted indicates this is likely to be the case.
  • Recheck Heep singles and coin yields to identify and fix problems.
  • Stability checks. Need some scripts to look at invariant mass vs run number, etc., for pi+/K+/p channels.

FULL REPLAY 2 of data, with improved optics and corrections.

  • SECOND LEVEL ANALYSIS TASKS with REPLAY 2 ntuples:
    • Final SHMS optic matrix element and acceptance determination.
    • Final HMS optics check.
    • Final Heepcheck offsets.
    • Better detector efficiency determination.
    • First check of Bill's L/T separation code.

FULL REPLAY 3 of data, with final calibrations and offsets.

  • THIRD LEVEL ANALYSIS TASKS with REPLAY 3 ntuples:
    • Final ep elastic cross-section checks.
    • Look at data in depth, and resolve outstanding problems.
    • First SIMC ntuple generation using new offsets.
    • Detailed Data/SIMC comparisons for HMS and SHMS focal plane and target reconstructed quantities, as well as W, Q^2, t, phi.
    • Preliminary L/T separation results.

FULL REPLAY 4 of data, with outstanding problems resolved.

  • ADVANCED ANALYSIS TASKS with REPLAY 4 ntuples:
    • Final SIMC ntuple generation using final parameters.
    • Thorough look at L/T/LT/TT separations, consistency checks as necessary.
    • Final look at systematic error contributions.

Hopefully not necessary, but if we have to: FULL REPLAY 5 of data.

  • OBTAIN:
    • Separated cross-section results.
    • Form factor determination begins. Model systematic error tests. Use more than one model, if at all possible.
    • Model dependence and other issues in form factor extraction.

Begin thesis writing, drafts of first papers

Updated by Richard Trotta over 4 years ago · 62 revisions