[Halld-jlab] Hall D Staff Meeting Notes, October 12, 2020

[Mark Ito]

Folks,

Please find the notes here 
<https://halldweb.jlab.org/wiki-private/index.php/Hall_D_Staff_Meeting,_October_12,_2020> 
and below.

   -- Mark

_______________________________________


  Hall D Staff Meeting, October 12, 2020


    Announcements, Eugene

  * Accelerator work during SAD ran into obstacles
      o chilled water
      o cryo
  * HD-Ice test beam, 10 MeV facility in test lab having recent successes
  * Knee injury reported on-site, PPE recommendations were sent out
  * Appraisal cycle is coming soon
  * Research fund are tight in Physics; may impair ability to pay for
    outside students and postdocs
  * Public Health Emergency charge code extended until November, but use
    is discouraged


    Tim

  * other than work in Hall, with Stephanie Worthington, preparing
    design packages for CPP, want to procure items before end of FY20


    Alex A.

  * keeping farm busy, production and analysis launches
      o production also running at NERSC and PSC.
      o production at IU coming soon
  * ρ SDME work, looking at 2018 data
  * open charm channels should be in analysis launches, starting to look


    Sascha

  * working on PS timing for PrimEx runs, for luminosity
      o tagger microscope time-walk issues
  * 19 crystals looked at
      o 2 with discoloration, may have to be sent back
      o SICCAS crystals will be sent shortly
  * CompCal on the floor in hall
      o want to move parts from the Hall to the lab
      o divider test during run: some did not work, need bench testing


    Alexandre

  * working on papers
     1. result from Hall A, GDH on neutron
     2. result from Hall B, GDH on proton
     3. starting writing on combined result
  * Hall D GDH: addressing various topics
  * will start DNP talk on hadronic structure using [?] QCD approach


    Beni

  * TOF: looking at data to see which PMT's need replacement
  * CDC: studying why rate increase significantly at the end of the run.
    conductive dust perhaps?
  * Analysis: guidance for handling event statistics and uniqueness tracking
  * EIC: working on cost analysis for PID detectors


    Elton

  * NIM paper: collecting info for author credit list
  * calorimeters
      o coordinating photon reconstruction task force
          + FIU: photon efficiency using η→π^+ π^− π^0
      o validation of 2020 data ongoing
  * CPP:
      o following upon beam test
      o supporting mechanical design
  * NPP: not much progress since busy time preparing for PAC
  * BDX: ran during Spring, Hall A has high current and low energy, good
    test
  * work on NIM paper[?]


    Hovanes

  * following up on issues from run
      o HV communication loss
      o FDC interlock problem[?]
  * KLF collaboration
      o doing simulations with FLUKA for compact photon source
          + approach follows that of Gabriel Niculescu


    Igal

  * PrimEx: working on calibration, almost finished
  * JEF: working on MC simulation of scalar production in η decay
      o developing figure of merit for signal over background
      o tuning simulation
  * tracking vertexing detector design
      o replace start counter
  * LOI for Snowmass, new physics with photon beam experiments


    Keigo

  * looked at 2020 straight track alignment using Millipede for FDC, not
    much movement
  * looking at γp→K^*0 X


    Lubomir

  * working on 2nd version of analysis note for 2nd J/ψ paper
      o re-do simulation: J/ψ and BH
      o look at p-pbar with mass in J/ψ region, no dip seen in p-pbar
  * paper on J/ψ scattering length with Igor Stravosky submitted to PRC
  * analyzing data GEM/TRD in front of DIRC, response to pions
  * thinking about large scale TRD detector


    Mark I.

  * GlueX software builds on Ubuntu 20 and CentOS 8 in containers done
  * working on bggen simulation for NPP background studies
  * gave talk at OSG All-Hands meeting on JLab/BNL/EIC and the Grid
  * Machine learning workshop (served on organizing committee)
  * Future Trends in Nuclear Physics Computing (served on organizing
    committee, moderated discussion at one of the sessions)


    Mark D.

  * FCAL: preparations for future runs, refurbish 200 bases?
      o make power system more robust against radiation induced failures
  * looking at ω SDMEs, 3π decay mode
  * reviewing paper


    Sergey

  * resumed charm production analysis
      o work on converting REST to ROOT files
      o will run on DAQ farm
  * analyzing GEM/TRD data with DIRC, looking at the rejection factor
  * ran some analysis on FPGA, get less than microsecond latency


    Simon

  * PID FOM in good state now, others can start to use it
  * working with Naomi Jarvis on CDC dE/dx measurement
      o alignment issue for π^−
  * looking at final states with neutron detected
  * Λ_c alternate analysis approach being developed


    Eugene

  * working on Yellow Report for EIC calorimeter group
      o BNL team focused on issues for a long time
      o JLab has experience with crystals
      o BNL pushing spaghetti calorimeter, novel construction technique
  * JEF grans turned down by NSF
      o will have to rely on our own resources
  * Thinking about improving Hall D pair spectrometer as a detector
    testing facility
      o EIC crystals with SiPM instrumentation will need testing


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