Apr 19/22 PionLT/KaonLT Analysis Meeting Notes
                ----------------------------------------------

Participants:
 - Tanja Horn (arrived late), Richard Trotta, CUA
 - Peter Bosted, Dave Gaskell, JLab
 - Jacob Murphy, Julie Roche, Ohio
 - Pete Markowitz, FIU
 - Nathan Heinrich, Garth Huber, Muhammad Junaid, Stephen Kay, Vijay Kumar,
   Love Preet, Ali Usman, Regina

Please remember to post your slides at:
https://redmine.jlab.org/projects/kltexp/wiki/Kaon_LT_Meetings

Richard
-------
- 10.6 GeV Heep-SINGLES analysis and SIMC comparison
  - adjusting offsets by hand, trying to determine a consistent SHMS offset for
    ssdelta
    
- *Suggestions*
  PB: has determined offsets for all of our KaonLT data
      - shifts delta in both hcana and SIMC, where offsets are stored in a
        master file
      - NOTE: finding a good set of offsets is sometimes tricky, as there can
        be multiple sets that give similar results
      - it would be good for Richard to compare his eventual offsets with PB's
        to see if they are different, or not
  DG: will send a copy of Henk's Heep Check Offsets Program

- otherwise continuing to deal with UTIL_KAONLT repo issues

- *Goal for Next Meeting*
  - a set of 10.6 GeV offsets

Ali
---
- fixing Heep Singles settings in standard.kinematics
  - results will be pushed soon, about 2/3 done
  - some 10.6 GeV angle TV settings were not recorded.  Will have to get the
    photos from raw data

- *Goal for Next Meeting*
  - either have all of the physics settings fixed in std.kin OR look at Heep
    8.2 data/SIMC comparison, depending on how fast things go
  
Vijay
-----
- PionLT low Q2 preliminary data/SIMC comparisons
  - 2.7 GeV done
  - 3.6 GeV: one setting done
  - 4.5 GeV; not yet started

  - still using OLD offsets
  - only needs to rescale SIMC*0.8, while low Q2 KaonLT needed 7x
  - comparisons generally look good

- *Suggestions*
  PB: xptar, yptar data/SIMC distribution edges look different
      *it is very important to have data and SIMC edges match*
    - had a similar problem in his analysis
    - shms_hut, hms_hut in SIMC has a flat for 3/4 scintillator trigger
      simulation
    - seems that the SIMC routine has a tighter scintillator grid than the
      actual detectors, for example the particles also give a Cherenkov signal
      in the hodo lightguides that is excluded in SIMC
    - to get around this problem, he turned off the flag in SIMC to ignore
      hardware cuts, then applied cuts later in both hcana and SIMC
    - the cuts that were applied were:
      - projection to S1, S2, aero, shower (fiducial cuts)
      - PB will send a copy of the fiducial cuts he used 

   DG: does not like this approach
    - would prefer to fix any problems in SIMC, rather than turn off this flag
    - we need to be sure that the hodoscope size and positions in SIMC
      are correct
    - TH agrees that this is the previous procedure, greatly preferred

- *Goal for Next meeting*
  - coplete rest of of PionLT low Q2 settings, then will go back to low Q2 Heep
    settings, and start to fix problems indentified in the preliminary analysis
    
Jacob
-----
- new SHMS hodo calibrations for Run 12055
  - major fix: hard cut on paddle constraints adjusted by Dave Mack
  - new velocity constraints by Carlos Yero
  - time walk TDC threshold parameter raised 120 -> 1200
    - p.hodo.beta distribution much improved (plot by CY)
    - trying to replicate CY's improvement
  - 2D plot p.gtr.beta:p.gtr.dp
    - weird blob structure and wiggles gone

- *Goal for Next meeting*
  1) fits for all different fall 2021 run settings
    - already looked at defocused Run 11799
  2) look at HMS hodo calib to see if any improvements result
    - HMS previously did not exhibit the same issues as the SHMS hodo calib

Junaid
------
- just got his JLab account back

- *Goal for Next meeting*
  - drift chamber and calorimeter calibrations

Nathan
------
- no report.  working on PionLT run plan and QFT class


Stephen
-------
- no report.  will look at online software soon

Dave G
------
- reported that no one (MJ, electronics group) is enthusiastic to do the FADC
  reprgramming, so it will be the same as the last run (i.e. we will not get
  the conventional data when there is an error, only Mode-10, so it will not be
  possible to directly compare them)

- Brad S is switching positions from A/C to Computer Center at end of month
  - will still be available for questions should we need him

Garth
-----
- will draft a call for shift workers

Next Meeting
------------
- Tues May 3 at 14:00 Eastern