Difference between revisions of "For the second coil"
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* '''Action Items''' | * '''Action Items''' | ||
− | ** remove jumper box and cables and bring to F117 for rework - done | + | ** Wiring |
− | + | *** remove jumper box and cables and bring to F117 for rework - done | |
− | ** remove current-limiting resistor boxes, 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 | |
− | ** minimize summed coil voltage readouts, do most sums in PLC | + | |
*** implement early-warning quench/overvoltage detection in PLC | *** implement early-warning quench/overvoltage detection in PLC | ||
− | + | *** add separate readouts of splice and vapor-cooled lead voltages | |
− | ** add separate readouts of splice and vapor-cooled lead voltages | + | *** combine splice and lead into one hardware quench/overvoltage protection channel using Newport controller |
− | + | *** match and balance all current-limiting resistors, go back to original 100k Ohm matched resistors | |
− | ** combine splice and lead into one hardware quench/overvoltage protection channel using Newport controller | + | ** read out voltage taps for quench detection and DAQ using separate resistor chain |
− | + | *** will not go to active isolation for the upcoming coil | |
− | ** match and balance all current-limiting resistors, go back to original 100k Ohm matched resistors | + | *** may need active isolation if passive isolation does not work |
+ | *** may implement active isolation in the hall | ||
+ | *** update wiring diagrams to "as built" | ||
+ | *** get diagrams and spec sheets to Fernando | ||
+ | *** understand signal clipping and interaction between readout modules, test and replace if necessary | ||
** Danfysik power supply | ** Danfysik power supply | ||
*** understand ramp-down mechanism | *** understand ramp-down mechanism | ||
− | ** UPS on Danfysik boards and contactor | + | *** UPS on Danfysik boards and contactor |
− | ** measure fast dump resistors in power supply - done | + | *** measure fast dump resistors in power supply - done |
+ | *** eliminate 2V DC offset | ||
+ | *** fix slow dump - done | ||
+ | *** make more copies of full Danfysik power supply manual (get from Steve L) | ||
** Danfysik quench detector | ** Danfysik quench detector | ||
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*** revert channels used for splice/leads to normal coil balance mode | *** revert channels used for splice/leads to normal coil balance mode | ||
*** install test points for gain/offset tuning | *** install test points for gain/offset tuning | ||
− | *** install pots for external balance if | + | *** install pots for external balance if unable to eliminate DC offset |
*** note that max ramp rate in the hall is 10V / 20H = 0.5 A/sec | *** note that max ramp rate in the hall is 10V / 20H = 0.5 A/sec | ||
− | ** | + | ** USB device |
− | * | + | *** install voltage dividers to extend voltage range |
− | + | ** rework Zener protection circuit | |
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− | ** install voltage | + | |
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− | ** rework Zener protection circuit | + | |
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** automated elog entries | ** automated elog entries |
Revision as of 11:50, 19 January 2011
- Action Items
- 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
- implement early-warning quench/overvoltage detection in PLC
- add separate readouts of splice and vapor-cooled lead voltages
- combine splice and lead into one hardware quench/overvoltage protection channel using Newport controller
- match and balance all current-limiting resistors, go back to original 100k Ohm matched resistors
- read out voltage taps for quench detection and DAQ using separate resistor chain
- will not go to active isolation for the upcoming coil
- may need active isolation if passive isolation does not work
- may implement active isolation in the hall
- update wiring diagrams to "as built"
- get diagrams and spec sheets to Fernando
- understand signal clipping and interaction between readout modules, test and replace if necessary
- Wiring
- Danfysik power supply
- understand ramp-down mechanism
- UPS on Danfysik boards and contactor
- measure fast dump resistors in power supply - done
- eliminate 2V DC offset
- fix slow dump - done
- make more copies of full Danfysik power supply manual (get from Steve L)
- Danfysik power supply
- Danfysik quench detector
- match and balance resistors
- revert channels used for splice/leads to normal coil balance mode
- install test points for gain/offset tuning
- install pots for external balance if unable to eliminate DC offset
- note that max ramp rate in the hall is 10V / 20H = 0.5 A/sec
- Danfysik quench detector
- USB device
- install voltage dividers to extend voltage range
- rework Zener protection circuit
- USB device
- automated elog entries
- A-B HMI improvements
- 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
- more HMI screens (may need license upgrade)
- simplify existing screens
- A-B HMI improvements
- A-B PLC program improvements
- simplify many operations
- improve PLC early problem detection
- improve PLC cryo control under varying CTF operating conditions
- A-B PLC program improvements
- 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?
- improve cryo system
- Basic questions
- what is causing blockage in vapor-cooled lead?
- broken valve!
- lag between field and current...are there turn-to-turn shorts in coil 1?
- maybe short, maybe eddy currents
- what worked, what didn't for coil 1?
- what should we do differently for the next coil?
- will we open up coils 3 and 4?
- what might we consider doing differently in the hall?
- do we want an independent review of our fast (and slow) dump strategy and system?
- have we documented our experience?
- sub-coil inductances
- measure with inductance meter on the platform
- inductance seen on splices
- USB and other device wiring problems
- noise
- better indication of what caused fast/slow dumps -- either LED Panel or bits to the PLC
- did we ever implement guard shack notification?
- what is causing blockage in vapor-cooled lead?