[Halld-jlab] Hall D Staff Meeting Minutes, January 7, 2019

[Mark Ito]

Folks,

Please find the notes below and here 
<https://halldweb.jlab.org/wiki-private/index.php/Hall_D_Staff_Meeting,_January_7,_2019>.

   -- Mark

_____________________________


  Hall D Staff Meeting, January 7, 2019

 From Gluex PRIVATE Wiki

Present: Alex Austregesilo, Eugene Chudakov (chair), Mark Dalton, 
Alexandre Deur, Hovanes Egiyan, Sergey Furletov, Mark Ito, Lubomir 
Pentchev, Patrizia Rossi, David Lawrence, Elton Smith, Sascha Somov, 
Simon Taylor


      Patrizia

  * Need slides from Eugene for Users Group Board of Directors meeting.
    He has already sent them in.


      Eugene

  * Today is Alexander's last day as JLab Staff. He is transitioning to
    CMU, but will retain the same office, job description, and overall
    demeanor as before.
  * A new staff position was promised to us quite some time ago. Status
    unknown.
  * Position of Hall D Work Coordinator remains open. Places additional
    load on Tim Whitlatch
  * Appraisals out for signatures by appraisees.
  * This calendar year we have two running periods
      o 68 days starting Jan. 30
          + first two weeks for DIRC commissioning, the balance PrimEx-η
      o 38 days starting Nov. 11
  * Activities in the Hall
      o Today one quartz window for the DIRC arrived
          + another to come
          + Next item: electronics, should be done by Monday
          + Then: install one optical box
          + Then: the other optical box
          + Schedule is tight, one optical box a *must*
          + all four bar boxes are installed on the frame
          + DIRC testing at high intensity for some days (2.5 × Fall
            2018 intensity)
          + Target will stay in for DIRC commissioning
      o Richard Jones and Jim McIntyre here from UConn to install new
        microscope fibers
      o will test magnet in two weeks
          + cryostat will have 1.5 cubic meters more helium than in
            years past!


      Elton

  * Time desired for CPP tests
      o David has a plan, Tim has been consulted
     1. passive shielding in front of TOF, lead
     2. high-Z target
     3. trigger studies
      o during DIRC commissioning, magnet will be on, cannot use crane
        to install shielding
  * calorimeter efficiency
      o Chinese collaborators have new method looking at angle in COM
        frame for π^0 decays


      Alexandre

  * will start bi-weekly run coordination meetings


      Sascha

  * CompCal
      o successful beam test completed
      o measured rates/cell, trigger rate
      o operated at low PMT voltage, gain of base-resident amplifier
        higher than preference
  * PrimEx run: target sequence needs decision soon
      o most likely: Be first, then L^4 He
  * DIRC
      o two SSP's installed today
          + a lot of parameters
      o crate can be read out, some residual problems


      Mark I.

  * Justin Stevens has proposal for merging DIRC reconstruction branches
    into the master branch
      o will discuss at tomorrow's software meeting


      Thomas

  * monitoring for DIRC and CompCal will be ready to go


      Lubomir

  * greenish contamination found in defective mass flow controller sent
    back to the manufacturer
      o CDC only
      o at end of run 60 μm filter installed in line, inspection to come
        soon
      o MFC replaced with rotometer
  * gas chromatographer has arrived
      o forming plan for installation


      Hovanes

  * DIRC controls
      o working on controls for optical box (interlocks, temperatures)
      o bar box controls already running
      o voltage controls ready, not hooked to supplies yet
      o DIRC PMT boards have temp. readout; specs not clear
      o DIRC scalers need read-out as well


      Alex A.

  * Spring 2018 reconstructed started
      o 35 runs spread throughout run, 5% of data, done
      o there are still minor timing issues in FCAL, have to be checked
        channel-by-channel, run-by-run
      o will look into whether gain constants for inner FCAL blocks are
        included in current constants

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