Difference between revisions of "For the second coil"
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** match and balance all current-limiting resistors, go back to original 100k Ohm matched resistors | ** 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 | ** read out voltage taps for quench detection and DAQ using separate resistor chain | ||
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** update wiring diagrams to "as built" | ** update wiring diagrams to "as built" | ||
** get diagrams and spec sheets to Fernando | ** get diagrams and spec sheets to Fernando | ||
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* Danfysik power supply | * Danfysik power supply | ||
** understand ramp-down mechanism | ** understand ramp-down mechanism | ||
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** measure fast dump resistors in power supply - done | ** measure fast dump resistors in power supply - done | ||
** eliminate 2V DC offset | ** eliminate 2V DC offset | ||
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** install test points for gain/offset tuning | ** install test points for gain/offset tuning | ||
** install pots for external balance if unable to eliminate DC offset | ** install pots for external balance if unable to eliminate DC offset | ||
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* USB device | * USB device | ||
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** minimize ice buildup | ** minimize ice buildup | ||
** more heating/insulation on N2 vent line | ** more heating/insulation on N2 vent line | ||
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** can we calibrate the C-glass sensors somehow? | ** can we calibrate the C-glass sensors somehow? | ||
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| + | '''For the hall''' | ||
| + | * UPS on Danfysik boards and contactor | ||
| + | * may implement active isolation depending on test results | ||
| + | * max ramp rate in the hall is 10V / 20H = 0.5 A/sec | ||
| + | * do we need additional valves, check valves, bypasses, whatever? | ||
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Revision as of 12:00, 19 January 2011
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
- 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
- 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
- minimize noise
- Danfysik power supply
- understand ramp-down mechanism
- 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
- 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
- USB device
- install voltage dividers to extend voltage range
- rework Zener protection circuit
- 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 to MySql
- more pre-defined trend plots
- more HMI screens (may need license upgrade)
- simplify existing screens
- better indication of what caused fast/slow dump
- A-B PLC program improvements
- simplify many operations
- improve PLC early problem detection
- improve PLC cryo control under varying CTF operating conditions
- implement early-warning quench/overvoltage detection in PLC
- improve cryo system
- minimize ice buildup
- more heating/insulation on N2 vent line
- can we calibrate the C-glass sensors somehow?
For the hall
- UPS on Danfysik boards and contactor
- may implement active isolation depending on test results
- max ramp rate in the hall is 10V / 20H = 0.5 A/sec
- do we need additional valves, check valves, bypasses, whatever?
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
- did we ever implement guard shack notification?
