[Nps] [EXTERNAL] Minutes of the NPS RG1A analysis meeting of July 24

[Roche, Julie]

Minutes from the RG1a NPS analysis of July 24, 2024, 8 am EDT



Meeting Recording:

https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_rec_share_vWSVIr2Mpqz-2DV-2DmHp0gXQ5PWlHNM2GVXZ-5FFZOVMlHI4S70iPl5O5IkgD7wLp0IXW.QhhjSn6yZ2EWzJD1&d=DwIF-g&c=CJqEzB1piLOyyvZjb8YUQw&r=GLZ1Uo9qDO03lszoD5gM3A&m=f-0NQe1tpQMtO5yJ69GXjWUrXPlljTzeIsFPsoIUOVTGdGvimCD4e0TeVJY3I1T2&s=Hg76EBK6Xxilnqhhl2fuQpFPBPP0KaHTHj36tOXV5PQ&e= <https://urldefense.proofpoint.com/v2/url?u=https-3A__jlab-2Dorg.zoomgov.com_rec_share_vWSVIr2Mpqz-2DV-2DmHp0gXQ5PWlHNM2GVXZ-5FFZOVMlHI4S70iPl5O5IkgD7wLp0IXW.QhhjSn6yZ2EWzJD1&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=qL8tFjwuc0SyLaG53L4uSQ&m=svBg64_ecPk2X130h-XT2eY-SA_MY4x70O6ZOd_aUqzYgO0KLjLTeRURh9GCaQvJ&s=7sOVPFnva7nymoaWEezJyJgx13ic2K0tZ7meESNyuu8&e=>

Passcode: 1?59QPq$

I only started the recording 5 minutes into the meeting: sorry.



Attending:

R. Michaels, A. Singh, C. Munoz, C. Morean, C. Ghosh, E. Kinney, H. Mkrtchyan, H. Huang, J. Crafts, M. Mazouz, M. Mathison, M. Kerver, R. Song, V. Tadevosyan, W. Hamdi, Y. Zhang, J. Roche.



B. Michaels: Update on Scaler Problem

  *   Slides: https://userweb.jlab.org/~rom/Scalers1.pdf
     *   Byproducts of the upgrade to CODA 3.10 and my misunderstanding. It affected NPS only. And now it’s fixed.
     *   In the Fall run, this affected about ~5%  with two different causes
     *   The hypothesis is that Helicity scalers are not affected. Bob is close to proving this right; they needs a few more weeks of work.
     *   Bob showed examples of good and bad runs with respect to this problem
     *   Comparing the helicity scaler reading to the “regular” scaler helps identify runs with bad regular scalers.
     *   Bob showed a list a remaining TO-DO list (last list)
  *   Open questions: does the helicity scaler report the EDTMs? Yaopeng and Bob will look into that.



Y. Zhang: Timing Windows check

  *   starts 24 min in the recording
  *   Slides: https://hallcweb.jlab.org/elogs/NPS-RG1a-Analysis/17
  *   The Cerenkov and the calorimeter show double peaks, which is surprising. Casey suggests investigating the multiplicity and possibly the trigger type.
  *   Charles and Casey suggest enlarging the good timing windows to make sure not to lose any events.



A. Singh: Check on the hodoscope calibration

  *   starts 43 minutes in the recording
  *   No slides
  *   showed beta values extracted from all runs from online replays of the mean of the histograms. Looks good.
  *   Will refine with fit and PID cuts



M. Kerver: PID calibrations

  *   starts 52 min in the recording
  *   no slides
  *   worked on his swift script for calibrations and ran it on half of the data
  *   might have to rerun the calibration with widened timing cuts (see Yaopeng’s presentations)



Our next meeting will be on Thursday, August 1 at 4 pm EDT.






Take care,

=====
Julie Roche
Professor of Physics
OHIO University
https://urldefense.proofpoint.com/v2/url?u=http-3A__inpp.ohio.edu_-7Erochej&d=DwIF-g&c=CJqEzB1piLOyyvZjb8YUQw&r=GLZ1Uo9qDO03lszoD5gM3A&m=f-0NQe1tpQMtO5yJ69GXjWUrXPlljTzeIsFPsoIUOVTGdGvimCD4e0TeVJY3I1T2&s=hem3QIevd-tW6lAb7Tp-PZo-8Yv0FvN6th3v1s_qwR4&e= 





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