Difference between revisions of "For the third coil"

Revision as of 10:57, 24 March 2011

To-do list

• Wiring
  • rewire for coil 3 subcoils
  • 20 kOhm protection resistors for coil taps if needed for quench detector balancing
  • eliminiate pickup on downstream lead/splice and other channels (esp. during dump)
  • understand induced voltages on taps during testing
  • understand noise, signal clipping and interaction between modules
  • document trip chains
  • label circuit breakers

• Danfysik power supply
  • fix broken transistor
  • commission fault sequencer
  • fix slow dump
  • understand ramp-down mechanism
  • understand varying fast dump time constant
  • choose ground fault detection mechanism
  • cover holes in cabinet

• Danfysik quench detector
  • implement divider circuit upstream of QD to eliminate effect of coil imbalances
  • install trip test points

• Instrumentation
  • ensure all devices on clean power with good grounds
  • check out Newport controllers, flow switch, replace if needed
  • implement system to isolate fault detectors and determine time sequence of trips
  • understand spikes on shunt Newport
  • understand effect of B field on all sensors, move devices if needed
  • monitor circuit breakers?

• NI USB device
  • rework Zener/divider box, needs to be fully bipolar
  • eliminate noise

• VME-based fast DAQ
  • get hardware, test in lab
  • write software, test in lab
  • connect to apparatus
  • commission

• A-B HMI improvements
  • upgrade to 100 screen license
  • implement fault sequence screens if system implemented

• A-B PLC program improvements
  • use custom ("add-on") instructions to simplify code

• EPICS

• 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?
• should we install a second contactor in the Danfysik power supply?
• 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?
• should we monitor all relays?
• what is the effect of B field on sensors/relays? should some instrumentation be relocated?
• lock box for power supply key
• more ethernet power strips