Difference between revisions of "GlueX Target Design Mtg, May 24, 2013"

Revision as of 14:31, 23 May 2013

Present: Dave Meekins, Jim Fochtman, Mark Ito, Chris Keith, Tim Whitlatch,

Agenda

• P&I Diagram Media:Target P&I.pdf
• Dave's SOW Media:Target new SOW.pdf
• Dave's Calcs Media:Target calcs1.pdf Media:Target calcs2.pdf
• Dave's FMEA Media:Target_FMEA.pdf
• Review notes from last week

Notes from last week

• Discussed Gas system status, vacuum system, cell and scattering chamber and tasks to be done. The following are the results of the discussion;
  • Procurement of gas system components started. Still need piping and relief valves. $40-50K, some components have arrived
  • Tank may be smaller than originally thought and may be located on the insertion cart
  • May put valve on tank to purge to vent system
  • Gas panel work going well
  • Need to determine location for temp purge tank?
  • Jim to talk with facilities on vent stack location
  • Plan to use 20' x 1.5 inch flex line to allow target to be moved in and out of the detector
  • lakeshore boxes from target group are in PLC controls ordered and some have arrived. Dave ordered remaining controls/cables?
  • Looks like a heat exchanger using LCW/Chilled water most economical for refrig. compressor. Jim working this
  • Jim to get with Chris and James on scattering chamber design (some ideas in work) (<15Psig).
  • Tim ordered vacuum system pump cube (Pfeifer turbo cube). Still need to order gauging.
  • Chris sent out list of all items needed for monitoring/controlling from PLC system
  • Hall D people to discuss what needs to be shut off in hall when target vacuum goes south
  • Jim to develop H2 vent details
  • Insertion cart can be extended upstream 18-24" to get panel and turbo in lower mag field. Jim to finalize design with target group.
  • One target cell is made, will need to make two more
  • Josh/James have ideas to develop heat shield and work out cold head weight limits. Jim to work with them on the design
  • Chris working on PLC algorithm and "empty target/fill target" procedure.
  • FMEA needed. Cannot rely on PLC for personnel safety. Use safety pressure switches to turn off/close vacuum valves, power to compressor and heater.
  • Pressurization to failure has been done on individual components. Dave does not believe we need to do the entire system to failure. 2nd DA agreement needed.
  • Heater on return line had little effect on enhancing convection - not needed
  • need heater on supply line to boil off liquid. It took 3 days to boil off neon from cell.
  • If heaters used, need controls
  • Plan on internal review this June
  • Cell was tested vertically. There is no plan to test horizontally until production components are fabricated.
  • Question came up if UPS power is required for any components. Maybe not if relays shut off compressor if power goes out.
  • need to review interlocks on P&I
  • All need to read Dave M. SOW and comment back to him.