[Halld-jlab] Hall D Staff Meeting Notes, August 8, 2016

[Mark Ito]

Folks,

Please find the notes below and at https://goo.gl/ainjmx .

   -- Mark
_____________________________


  Hall D Staff Meeting, August 8, 2016

 From Gluex PRIVATE Wiki

Present: Alexander Austregesilo, Eugene Chudakov, Alexandre Deur, Sergey 
Furletov, Mark Ito, Paul Mattione, Patrizia Rossi, Simon Taylor, Beni 
Zihlmann


    Eugene

  * In April there will be a workshop on retirement.
  * The FY 17 budget is still unknown
      o 300 k$ set aside for a L3 farm
  * The issue with MOUs with foreign institutions has still not been
    resolved.
  * Solenoid magnet power supply is supposed to be ready this week. Plan
    is to start testing next week at 1350 A.
  * Thomas Brittan has been selected for the post-doc position
  * Starting to review applications for the staff position


    Sergey

  * investigating high luminosity performance of the DAQ
      o many parameters, hard to isolate the essential ones
  * goal 100 MB/s capability per crate (200 MB/s would be better)
  * now can get to 50 MB/s per crate
  * software is likely bottleneck
  * working with Dave Abbott and Bryan Moffit
  * to go to greater than 100 MB/s: several directions possible:
    increase # of crates, # of controllers, go to fiber read-out
  * load is roughly balanced among modules in crates, crate-to-crate


    Simon

  * checked in tracking code, used drift time info from FDC
      o improvement seen
      o studying resolution with revised code
  * multi-photon analysis
      o added 7, 8 photon channels
      o added e^+ e^-</sip> + nγ channels


    Paul

  * submitted CLAS analysis note
  * tomorrow, analysis meeting: present tracking resolution results
  * analysis launch on-going
      o worked with plug-in authors to insure reasonability
      o contributed 20 plug-ins, channels with strangeness, will start
        looking at a selection


    Alexander A.

  * working on running the analysis launch
      o 14 people contributed, more than 50 channels analyzed
      o second batch started with new plugins, 70% done now
  * new monitoring launch with recent code improvements proposed
  * looking at 3πn and 4πn plugins[?]
  * continuing work on FDC performance
  * looking at systematics of beam energy shifts


    Mark I.

  * running the sim1.1 simulations, 8000 jobs, about 150 have problems,
    being sorted
  * built a new release of sim-recon: 2.2.0. Building against both ROOT5
    and ROOT6
  * working on TOF tube current problem, ordered extra spare tubes from
    Hamamatsu


    Beni

  * looking at timing resolution at lower HV
  * comparing beam data and cosmics at same too-high voltage, cosmics
    worse, measurement of discount factor due to geometry of cosmic triggers
  * comparing cosmic data a different voltages see similar resolution
  * must set thresholds lower
  * need to prepare a run plan for determining settings at beginning of
    next run
      o channel-by-channel HV adjustment
      o channel-by-channel discriminator threshold adjustment
  * rates are stable except for high-rate conditions where central PMTs
    have gain compromised by too-high current requirement


    Alexandre D.

  * working on electron beam energy determination studies
      o there is an analysis note in the DocDB
      o talking with accelerator and Doug Higinbotham about
        discrepancies in the data
      o looking at feasibility of using tagger magnet to monitor energy
  * received radiation monitors
      o one for the Hall to replace loaners from Hall C
      o one to be used in the fast-access system


    Eugene

Final items:

  * tomorrow: emergency exercise on accelerator site
  * some end-of-year spending: TOF PMTs, spare HV modules for future
    projects


    Patrizia

  * asks about follow-up to mini-review on high-intensity DAQ running
  * Eugene: numbers by the end of the month

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-- 
marki at jlab.org, (757)269-5295

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