For the second coil

To-do list

• Wiring
  • remove jumper box and cables and bring to F117 for rework - done
  • remove current-limiting resistor boxes, bring to F117 for rework - done
  • minimize summed coil voltage readouts, do most sums in PLC - done
  • add separate readouts of splice and vapor-cooled lead voltages - done
  • combine splice and lead into one hardware quench/overvoltage protection channel using Newport controller - done
  • match and balance all current-limiting resistors, go back to original 100k Ohm matched resistors - done
  • read out voltage taps for quench detection and DAQ using separate resistor chain - done
  • update wiring diagrams to "as built" - done
  • get diagrams and spec sheets to Fernando - done
  • checkout, understand noise, signal clipping and interaction between modules

• Danfysik power supply
  • understand ramp-down mechanism - done
  • measure fast dump resistors in power supply - done
  • eliminate 2V DC offset - done
  • fix slow dump - done
  • make more copies of full Danfysik power supply manual (get from Steve L) - done
  • implement ground fault detection compatible with quench detector

• Danfysik quench detector
  • match and balance resistors - done
  • install test points for gain/offset tuning - done
  • install pots for balance - done
  • install bias circuit to account for Danfysik DC offset and common mode voltage - done
  • checkout

• Dataforth system
  • Correct for 2M Ohm internal impedance and 200k Ohm resistors in voltage tap readouts - done
  • Correct for other internal resistances (vapor-cooled leads and splice)

• USB device
  • install voltage dividers to extend voltage range - done
  • add resistors to Zener protection circuit - done
  • complete Zener/divider box and checkout

• automated elog entries
  • automatically dump screens to files - done
  • create perl script - done
  • create cron job - done

• A-B HMI improvements
  • get additional HMI client license from Steve - done
  • get second HMI computer working - done
  • implement A-B license server - done
  • get A-B IIS file server system working - done
  • change HMI database to MySql - done
  • create more pre-defined trend plots - done
  • improve screen layouts - done
  • upgrade to 100 screen license

• A-B PLC program improvements
  • new channels - done
  • improve, simplify program - done
  • try A-B alarm and logging systems - done
  • test PLC-based alarm system
  • use custom ("add-on") instructions to simplify code

• EPICS
  • get list of all tags from osh - done
  • serve out all PLC channels to CA
  • implement guard shack notification for IOC hang/crash

• EWEB screens
  • update for latest tags and drawings

For the hall

• note that max ramp rate in the hall is approximately 10V / 20H = 0.5 A/sec
• should we install a UPS on the Danfysik contactor and control boards?
• do we need additional valves, check valves, bypasses, whatever?
• do we need Dataforth voltage attenuators on coil tap channels?
• do we need active isolation of coil tap channels, etc?
• should we monitor all circuit breakers?

Basic questions

• lag between field and current...are there turn-to-turn shorts in coil 1?
  • maybe short, maybe eddy currents...
• will we open up coil 3 and/or coil 4?
• do we want an independent review of our fast (and slow) dump strategy and system?
• document our experience!