Difference between revisions of "For the second coil"
From GlueXWiki
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*** combine splice and lead into one hardware quench/overvoltage protection channel using Newport controller | *** 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 | *** 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 |
*** will not go to active isolation for the upcoming coil | *** will not go to active isolation for the upcoming coil | ||
*** may need active isolation if passive isolation does not work | *** may need active isolation if passive isolation does not work | ||
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*** get diagrams and spec sheets to Fernando | *** get diagrams and spec sheets to Fernando | ||
*** understand signal clipping and interaction between readout modules, test and replace if necessary | *** understand signal clipping and interaction between readout modules, test and replace if necessary | ||
+ | *** minimize noise | ||
** Danfysik power supply | ** Danfysik power supply | ||
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*** HMI development machine and license | *** HMI development machine and license | ||
*** contact A-B salesman about licenses | *** contact A-B salesman about licenses | ||
− | *** change HMI database | + | *** change HMI database to MySql |
*** more pre-defined trend plots | *** more pre-defined trend plots | ||
*** more HMI screens (may need license upgrade) | *** more HMI screens (may need license upgrade) | ||
*** simplify existing screens | *** simplify existing screens | ||
+ | *** better indication of what caused fast/slow dump | ||
** A-B PLC program improvements | ** A-B PLC program improvements | ||
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*** do we need additional valves, check valves, bypasses, whatever? | *** do we need additional valves, check valves, bypasses, whatever? | ||
*** can we calibrate the C-glass sensors somehow? | *** can we calibrate the C-glass sensors somehow? | ||
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*** measure with inductance meter on the platform | *** measure with inductance meter on the platform | ||
*** inductance seen on splices | *** inductance seen on splices | ||
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** did we ever implement guard shack notification? | ** did we ever implement guard shack notification? |
Revision as of 11:51, 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
- minimize noise
- 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 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 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
- did we ever implement guard shack notification?
- what is causing blockage in vapor-cooled lead?