[Halld-jlab] Hall D Staff Meeting Notes, March 23, 2015

[Mark Ito]

Folks,

Please find the notes below and at 
https://halldweb.jlab.org/wiki/index.php/Private:Hall_D_Staff_Meeting,_March_23,_2015 
.

   -- Mark
______________________________


Private:Hall D Staff Meeting, March 23, 2015
 From GlueXWiki
Present: Fernando Barbosa, Eugene Chudakov (chair), Mark Dalton, Hovanes 
Egiyan, Sergey Furletov, Mark Ito, David Lawrence, Lubomir Pentchev, 
Patrizia Rossi, Elton Smith, Sascha Somov, Justin Stevens, Simon Taylor, 
Tim Whitlatch, Beni Zihlmann


Announcements, Eugene

  * DOE budget briefing:
      o FY16 lean operations budget
      o FY17 may get 30 weeks
  * Simon is now Staff Scientist II!
  * DIRC review
      o currently waiting on MIT mirror development results
      o Patrizia: status assessment a good reason to hold review
      o will schedule something for summer
  * conferences
      o Mark D. going to CIPANP
      o get your plans into Eugene ASAP


Long-Range Plan, Patrizia

  * Mon. Tue. next week: preparatory meeting for EIC component


Solenoid, Eugene

  * last Wednesday's incident, three possibilities
     1. quench or "flux jump"
     2. motion of conductor
     3. turn-to-turn short
      o similar incidents seen before
  * plan: stay at 300 A for this week, 800 A may be OK if needed
  * remedies
      o can reduce ramp rate
      o can introduce delay of 200 ms before magnet dumped, avoids
        ramping down if voltage excursion quickly self-correcting
          + this incident different from major quench 2 years ago, no
            signals on magnetic pick-ups then
  * incident on Saturday during ramp down: extremely short voltage
    excursion, 2 ms


Temperature in Hall

  * Mark D.: regulating with fan speed temperature
      o try range from 4 to 6 kRPM
      o OK for FCAL, BCAL South, not enough dynamic range for BCAL North
  * Fernando: detailed understanding not there yet
      o will look at data from power supplies, voltages stable or not?
      o back of racks: warmer than ambient, fans might help
      o will test single board
      o pedestal variation should be on 14 to 16 bit level with this
        temperature variation, not the 12-bit that we see
      o should try baffles, walls, or something in Hall to further
        disperse flow from HVAC unit
          + Tim: will try something, several simple options available


Run Readiness, David

  * Optics experts were due at MCC at 1 pm today


Fourinert, Lubomir

  * loss still a concern
  * Tim: consulted with manufacturer, we fill overflow tank, perhaps
    liquid accounting issue?


Shift Takers' Info, Elton

  * update target instruction
  * Tim will provide simplified solenoid operating instructions
  * gluon nodes rebooting
      o David: gluon46 replaced with gluon48 for now
  * photon beam procedures live mostly in log book
      o need to transfer to ops wiki


Survey Data for Spring 2015, Tim

  * latest results in from Survey Group
  * Lubomir will make a link, like for Fall Run


EIC Consortium Meeting, Fernando

  * RPC meeting held
  * RICH meeting next
  * meetings every other Monday
  * RICH-specific meeting every other Friday

Retrieved from 
"https://halldweb.jlab.org/wiki/index.php?title=Private:Hall_D_Staff_Meeting,_March_23,_2015&oldid=64369"

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

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