[Halld-jlab] Hall D Staff Meeting Notes, January 12, 2015

[Mark Ito]

Folks,

Please find the notes below and at

https://halldweb1.jlab.org/wiki/index.php/Private:Hall_D_Staff_Meeting,_January_12,_2015

   -- Mark
____________________________________________

Private:Hall D Staff Meeting, January 12, 2015
 From GlueXWiki

Present: Alex Barnes, Eugene Chudakov (chair), Mark Dalton, Alexandre 
Deur, Hovanes Egiyan, Sergey Furletov, Mark Ito, Paul Mattione, Lubomir 
Pentchev, Carlos Salgado, Elton Smith, Sascha Somov, Simon Taylor, Tim 
Whitlatch, Beni Zihlmann

Eugene

  * Today is Paul Mattione's 1st day. He will be working on:
      o data processing
      o EPICS and slow controls
      o physics analysis
  * Justin Stevens will join the group starting in March. He will work on:
      o physics analysis
      o DIRC development
  * budget: this year tight, $6M short of full funding
  * running schedule
      o mid-Feb. accelerator starts, 5-pass separator commissioning
      o beam to tagger dump as early as Mar.
      o beginning of Apr. to beginning of May: physics, about 5 weeks
      o Fall run: for accelerator, no physics
      o DOE briefing on Feb. 3 may give more information
  * software review coming up February 11
      o Mark:
          + Curtis, David L., and Mark have met.
          + Focus will be on accomplishments from commissioning run with
            emphasis on software
  * Elton: CW beam means beam must go to tagger hall
      o Eugene: we need to be ready to take beam at beginning of March
  * major goals for Spring:
      o diamond radiator
      o commission LH_2 target
      o go to 1300 A with solenoid


Alexandre

  * meeting last Thu., goals and tasks outlined for Spring run
  * wiki page up for planning
  * please give him feedback, identify missing items
  * schedule being produced
  * Eugene: we will need someone to take over Yi's work on the solenoid
      o David Butler will take care of hardware, running the PXI system
      o need data analysis, control software person


Sascha

  * level 1 trigger meeting:
      o firmware updating on many boards
      o Sergey working on signal distribution boards
      o playback implemented
      o thresholds modified for new version
      o checking needed
      o new tools used for checking new firmware and for beam, can use
        for timing alignment of trigger components
      o level 1 monitoring tool needs to be user friendly, Sergey P.
        will work on this
  * working on understanding trigger performance, especially FCAL
  * with Nathan will look at PS data, as well as tagger hodoscope


Sergey F.

  * hardware not working so looking at data
      o FCAL data: checking what we write to disk
  * F125 in block mode: can we get to 20 kHz?
      o in fact 40 kHz will be the goal
      o problem with busy in firmware


Alexandre

  * met with Chris Keith on the target, will:
      o check alignment
      o check that rate scales with luminosity
  * also looking at data for beamline


Beni

  * looking at CDC data: efficiency, rates, etc.
  * taking over DIRC photon detector work from Yi
      o received microchannel device
      o working with Rodrigo
      o have seen signals


Tim

  * shielding in tagger area
  * bellows on tagger hall beam pipe
  * insertable profiler
  * polarimeter installation prep (turbo pump)
  * hydrogen target installation and testing
  * total absorption counter: checkout and survey
  * survey plan: finish by end of Feb.
  * temporary goniometer radiator to be designed
  * Feb. 18: fire safety review for Hall
  * solenoid:
      o getting bad signals back from refrigerator, working with cryo
        group to track it down
      o mass flow controllers going back: want open when off
      o liquid sensors being replaced
      o Danfysik coming for power supply maintenance
  * chiller for FDC goes out for repair tomorrow


Simon

  * working on prep for another round of simulation, put in tilt of
    start counter
  * revisiting timing between detector components
  * calibration of CDC time offsets
  * obtaining CDC alignment parameters from cosmics


Mark I.

  * DC3 preparations underway
  * meetings held on software review prep, David, Curtis, MMI
  * new webserver being prepared by Marty Wise
  * farm has been upgraded with 4000 cores


Elton

  * FCAL fire safety meeting
      o VESDA in darkroom
      o Tom Carstens coordinating
  * BCAL
      o Mark D. looking at FCAL triggers and BCAL triggers
          + BCAL-FCAL factor of 5 in triggers
          + 100 k π^0 s in BCAL
          + same for FCAL
      o Nick and Chris doing fixes, humidity(?) among them
      o will turn things back on this afternoon
  * Hot Check Out
      o all items downgraded to checked
      o groups responsible for moving to ready
      o probably will start in a month
  * will need review from management before running
  * RF from ACC
      o Chris S. assembling boards, FPGA programming needed
  * User Board of Directors meeting this week
  * Thursday: Elton on panel for Hall B commissioning review


Mark D.

  * BCAL low-level calibration
      o attenuation length being measured for each cell: 4.5 to 5.5 m
      o reflections from light guides giving better results that for
        bench tests
  * with 1/3 to 1/2 of data set, have π^0 about right
      o see non-linearity in photon energy response
      o good mass from photons above 1 GeV
      o working with Will McGinley's plug-in


Paul

  * offline monitoring launched over the weekend
  * TOF matching improvements implemented
  * TOF hit distributions OK now
  * still have mysterious double peak in energy spectrum


Lubomir

  * end of last week: shut off FDC chiller
      o will control power with PLC
  * analyzing FDC data, drift velocity different from cosmic running,
    15% faster
      o would require large gas mixture error 40/60 to 45/55
      o could be the alcohol
  * data for alignment, no B-field, low energy tracks, 100-200 MeV pions
      o efficiency could be higher than for higher momentum


Hovanes

  * FCAL voltage control, problems in Fall
      o bases go to max. voltage spontaneously
      o read-out speed a problem
  * gas system control modifications coming
      o need remote flow shut-off
  * magnet power supply (tagger and pair spect.) manually did not get
    ramped to max. before going to set-point always, will implement
    automatic procedure
  * add LCW alarm
  * add Hall climate alarms
  * new motor applications: beam profiler, polarimeter target
  * tomorrow: control meeting on hydrogen target
      o current system in LabView w/ EPICS server
  * TAC needs checking and alignment


Carlos

  * PWA meeting moved to Wed., 10 am
  * trying to simulate different naturalities of exchange particle with
    linear polarization
      o theorists have amplitudes
  * finishing documentation on gui-based PWA on JLab farm
      o webpage exists with documentation, code


Alex B.

  * tagger microscope fiber analysis
      o upstream good (200 pixels)
      o downstream not so much
  * small board with voltage control: will make spares
  * no fresh news on active collimator

Retrieved from 
"https://halldweb1.jlab.org/wiki/index.php/Private:Hall_D_Staff_Meeting,_January_12,_2015"

-- 
Mark M. Ito, Jefferson Lab, marki at jlab.org, (757)269-5295

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://mailman.jlab.org/pipermail/halld-jlab/attachments/20150113/cb4b479e/attachment.html