Present: D.Westermann, L. Felsberger, J. Steckert, L. Millet
- two high level questions
- why both cliq and HDS
- low current cliq not effective
- power distribution
- david slides
- yes, single quench is most likely
- symmetric more by wave of warm helium or beam losses that are symmetric
- Q1A & A1B symmetric can never happen (it was decided)
- cabling can be included and taps are routed in the same cable
- come all out of IFS
- one going o service gallery in patch panel, shuffling to A & B box
- patch panel of uqds is being designed
- connection of uQDS to PDSU
- single ended, has protection
- agreed to sit together and mark ciritcal path on schematics
- jens agrees to go to pesimistic
- could also be on settings
- number of systems
- inspection intervals
- all interlocks tested yearly
- cannot do during normal operation
- pdsu measures trigger current to protective elements (can test without HDS on)
- can inject test signal in input channel - this is how interlock test is done
- in normal operation
- permanent checkers for noisy or degrading signals
- voltage tab unlikely breaking silently
- elqa will only do it after LS
- hard to construct case where voltage tap
- HDS/CLIQ
- policy for machine so far was once a year
- to be checked how it will be in future
- uqds bb
- intermagnet busbars
- also return busbar
- two times two taps - but sometimes shared with coil protection
- laure
- SPI
- lagging
- how much triple modular redundancy? jens - we do not have it, no radiation
- leading
- spikes below the filter
- jens: would need assessment of signal quality, which do not exist yet
- one source of spikes is power converter
- long term data
- is 10Hz
- only on events have post mortem - few tens of KHz
- stuff recorded for uqds
- magnet voltages
- derived signals
- logic status
- system performance indicators
- configuration data (in LSA)
- uqds has lots of adjustable units
- configuration cross-check every start up of units
- following intervention
- different operational phases
- consider different detection thresholds on different detection strategies
- is possible - is it a question of reliability or optimizing selectivity
- Laure would appreciate list of indicators that are monitored
- Jens: system is designed on the nervous edge and indicates everything with a false dump
- outside commissioning rare to see something
- power supplies will get monitoring
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