Day 2 Summary Notes2024
NPS COLLABORATION MEETING - 18 JULY 2024
PARTICIPANTS: Alexandre Camsonne, Hao Huang, Carlos Munoz-Camacho, Po-Ju Lin, Mitch Kerver, Julie Roche, Charles Hyde, Josh Crafts, Tanja Horn, Wassim Hamdi, Christine Ploen, Dave Gaskell, Michael Nycz, Alexandre Camsonne, Allison Zec,
ONLINE: Hamlet Mkrtchyan, Yaopeng Zhang, Iulia Skorodumina, Malek, Paul Anderson, Taehee Song, Vardan Tadevosyan, Vladimir Berdnikov, Avnish Singh, Carlos Ayerbe, Peter Bosted, Casey Morean, Mark Jones,
DEADTIME/EFFICIENCY (Yaopeng Zhang)
- NPS deadtime - Ben has simulated scenarios that generate deadtime, need to reproduce this by data
- Luminosity analysis
- quantitatively overall numbers consistent with KaonLT
- Unclear why non-tracked and scalers do not agree
- BCM offsets seem within the ~250nA offset
HELICITY ANALYSIS (Yaopeng Zhang)
- Is there a theoretical model one can compare to? - e.g., for eepi0 there are models for the asymmetries: https://arxiv.org/pdf/0711.4736
BPM/BCM (Christine)
RUN LIST (Josh)
- Global run list maintained as a spreadsheet with option to produce a machine readable file
- Discusion about adding features:
- good/bad calorimeter blocks
- efficiencies
HMS DC CALIBRATIONS (Avnish, Yaopeng)
- Propose a fine tuning of the reference time cuts from 14000 to 14300. This seems fine, so go ahead. Quantify the background contribution
- Plan to push updated reference times within one week. Important for other calibrations, e.g., electron PID
- Check stability of calibrations and efficiencies with runs
HMS electron PID: Cher and Calo (Mitch)
- Starting the calibrations
- Some calorimeter runs suggest that calibration is needed - electron peak is shifted to ~0.9 from unity
- Needs reference time information
- Check stability of calibrations and efficiencies with runs
HMS OPTICS (Christine, Josh)
- Main goal: impact of sweeping magnet on HMS optics and saturation
HMS HODOSCOPES (Avnish)
- Possibly the calibration parameters in github are not the calibrated ones. Need to check this
- Next step: check stability of beta vs. xfp and yfp to see if any new calibrations are needed
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NPS CALORIMETER CALIBRATIONS
- Energy calibrations (elastic and pion) (Hao)
- discussion about change in coefficients with energy (after pass change)
- using hcana
- suggestion to look at the width of the pi0 distribution vs energy; have looked at the pi0 position vs energy before
- discussion about if energy deposited (NPE) was studied already - there have been studies on resolution with waveform analysis that showed that the obtained resolution is consistent with expectation
- Waveform analysis (Wassim)
- discussion about shoulder in coincidence time spectrum
- discussion about origin of constants in the fit forms presented in finding center block - see paper by Malek for details: https://arxiv.org/pdf/1510.00516
- for waveform analysis on all runs need: good runlist, elastic analysis to get the reference wave forms, and all the parameters from the calibrations
- Tracking dead bases discussion (All)
- need to define criteria to define a dead base - there may be multiple categories
- using the criteria search for dead bases; start with manual list and later automate
- could start from the list of bases that were replaced - assuming list has dates in it and failure occurs fast
- symptoms of dead base: pedestal shift (radiation damage), number of pulses in a block, noisy,