GlueX Target Design Mtg, March 22, 2013
From GlueXWiki
Present: Dave Meekins, Jim Fochtman, Mark Ito, Chris Keith, Tim Whitlatch, James Brock, Josh Pierce, Dave Butler
Agenda
- P&I Diagram Media:Latest Target P&I.pdf
- Dave's SOW Media:Target SOW.pdf
- Dave's Calcs Media:Target calcs1.pdf Media:Target calcs2.pdf
- Review notes from last week
- Review Dave's SOW
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
- Purge bottle may be a temporary setup and not need a permanent position.
- Target group will order the 500 gallon H2 tank for outside and take care of piping and instrumentation on the tank - off-shelf item, order in June/july
- Jim Fochtman working on the pad requirements for the tank and purge system as well as path of piping to hall and submit to facilities for installation.
- Probably locate pipes to tank through cryo penetrations.
- 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
- Dave to handle pressure system design as the DA
- 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.