For the second coil

• Basic questions
  • lag between field and current...are there turn-to-turn shorts in coil 1?
  • what worked, what didn't for coil 1?
  • what should we do differently for the next coil?
    • what coil will we test next?
    • will we open up coil 4?
  • what might we consider doing differently in the hall?
  • prioritize into "must-haves", "should-haves" and "would-like-to-haves"
  • have we documented our experience?

• Puzzles and problems to be addressed before next coil test
  • improve cryo system
    • minimize ice buildup
    • more heating/insulation on N2 vent line
    • do we need cold traps?
    • do we need additional valves, check valves, bypasses, whatever?
    • can we calibrate the C-glass sensors somehow?
  • field polarity reversed
  • sub-coil inductances appear to be backwards
    • measure with inductance meter on the platform
  • inductance seen on splices
  • USB device wiring problems
  • other wiring, cable and connector problems
    • better indication of what caused fast/slow dumps -- either LED Panel or bits to the PLC
  • total coil inductance disagreement
  • use matched current-limiting resistors
  • dynamic range adjustments
  • noise elimination
  • 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?
    • cold traps to prevent blockage?
    • heaters to melt blockage?
  • improve ability to adjust quench detector
    • bring test points to front panel
    • use matched resistors
    • will quench detector work for coil 4?
    • note that max ramp rate in the hall is 10V / 20H = 0.5 A/sec
  • 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
    • relabel readouts
  • additional HMI license, get second computer working
    • dual-redundant HMI server or another machine for the server
    • HMI development machine and license
    • contact A-B salesman about licenses
    • change HMI database
  • 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?