Coil Test Weekly Meeting 17-Dec-2010

Solenoid Coil Test Weekly Meeting

Location and Time

• Fri 17-Dec-2010 10 am ARC 428 (later time due to delayed opening due to snow)

Agenda

• Operational experience - all
  • what worked, what didn't for coil 1?
  • what should we do differently for the next coil?
    • what coil will we test next?
  • what might we consider doing differently in the hall?
  • distinguish between "must haves" vs "should haves" vs "would like to haves"
  • have we documented our experience?

• Puzzles and problems to be addressed before next coil test
  • improve cryo system
    • cold traps
  • field polarity reversed
  • sub-coil inductances appear to be backwards
  • inductance seen on splices
  • USB device wiring problems
  • other wiring, cable and connector problems
  • total coil inductance disagreement
  • slow dump doesn't work
  • understand fast dump circuit
    • measure fast dump resistances
  • understand Danfysik ramp-down mechanism
  • vapor-cooled lead blockage
    • can anything be done to avoid another one?
  • improve ability to adjust quench detector
  • use new sensor for vapor-cooled lead voltage drop
  • isolation and current-loop readout for critical signals
    • interaction via Zener and Dataforth clipping
  • UPS on Danfysik boards and contactor
  • improve PLC cryo and MPS algorithms (in preparation for non-expert use)
    • simplify many operations
  • improve PLC early problem detection
  • improve PLC cryo control under varying CTF operating conditions
  • add more HMI screens (may need license upgrade)
  • simplify existing screens
  • additional HMI license, get second computer working
  • more pre-defined trend plots
  • did we ever implement guard shack notification?
  • automated elog entries
  • update drawings and documentation
  • where is manpower to make improvements?
  • what else?

• Coil repair status - George
  • coil 3 at IUCO
  • coil 2 winding supports
  • plans for coil 4

• Test responsibilities
  • Low power magnet testing 5A, 50A,100A - Elliott
  • High power magnet testing 100-1500A - Elliott
  • Identify possible turn to turn shorts during ramping - Eugene
  • Assess Heim column centering in coil - George
  • Assess Axial column forces - George
  • Estimate LN2 and He heat leak - Jonathan
  • Assess LN2 and LHe thermal siphons - Jonathan

• Preparations for testing next coil - George, Scot, Elliott
  • ship coil 3 to JLab
  • update P&I
  • splices
  • yoke location
  • piping adaptors
  • downstream yoke spacers
  • controls racks rewiring
  • quench detector
  • connectors
  • what else might be useful?