Difference between revisions of "For the second coil"
From GlueXWiki
m |
m |
||
| Line 1: | Line 1: | ||
| + | '''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 | ||
| + | ** 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 | ||
| + | ** minimize noise | ||
| − | * | + | * 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 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 |
| − | + | ||
| − | * | + | * 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 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 | |
| − | + | * 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? | |
| − | + | '''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? | ** 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? | |
Revision as of 11:55, 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
- 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
- minimize noise
- 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 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
- 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
- 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?
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?
