Date

Attendees

Goals

Discussion items

TimeItemWhoNotes

Night time ops callsSebastian
  • Sebastian will talk to Axel
  • As far as Sebastian knows we are not doing owl shift calls
  • Sebastian will find out
  • Sebastian. Maybe we add info to CM summary display to add more info about what you should and when to call experts
    • e.g. cavity calibration failed might not need a call (but maybe if you can't maintain energy?)
  • Lauren has started dragging EOIC's into troubleshooting, at least so they can gather more info before calling
    • Lauren is interested in expanding low level trouble shooting

SRF Maintenance Meeting
  • 30 min once a week meeting to discuss issues that are coming/becoming more common
  • Lauren: should include EOICs.
  • Sebastian: maybe just Janice as an intermediate to keep the group small
  • Questions about training again. Showing just one EOIC something might not spread well through ops.
  • Could join weekly ops Thursday meeting and have window for us there for people to complain about SRF issues they've had recently

SSA Char Failure
  • Had an SSA fail SSA char last night and Lauren got called
    • Was needed to get needed gradient in L
  • This is one of those things where it just fails because (maybe temp changes?) just cause a point to fail
  • Should we re-institute a thing where it lowers drive max and tries again?
    • Use saved value, iterate down some amount, don't save a new value?
  • Lauren: should we start another wiki article with some more SSA trouble shooting when auto-setup fails?
  • Lisa: hard to maintain info in two places? Pop up in auto setup gui?
  • Lauren: how to feed Lisa the issues?
    • Gui problem/bug: github
    • Process choice? Issue? Missing feature? Gap?
  • Dan: another layer?
    • SSA cal fail. Setup fails and new layer appear "do you want to try again" but then does something slightly differently (like lower drive max)
  • Lauren: wiki is nice because we can all easily edit it
  • Sebastain: wiki is a starting place for guides while developing them and then implement them into the gui
    • Might become configuration challenge
  • Auto setup confluence
  • Something about spec vs procedure. Sebastian: I want spec to be a how to (question)
  • Lisa: we should have another meeting

Should we detune cavities?Dan/Sebastian
  • Dan: Matt said from PGE side the risk is from the switch-over of losing power.
    • More risky! Planned electrical work at the cryoplant and we need to talk to Dirk
    • Matt made the point that we'd look like massive idiots if the cryoplant goes down
    • We'll also look really dumb when a tuner finally breaks
  • Lauren: I'm not seeing this in pamm list?
    • Maybe it's not cryo? Maybe they didn't consider it pamm work?
  • If we are detuning we have to do it Sunday
    • Is two hour (10 to 12 window) large enough?
    • Is anything happening between 6 and 10?
  • Sebastian has pumpkin fest to contend with
  • Homework to do. Sebastian still making decision.

Weekend on call listSebastian
  • On call list didn't have weekend because shutdown time was originally Friday. Updated weekend.

Next turn onSebastian
  • Turning off Sunday Oct 15th
  • Turn on planed Tuesday Oct 24th





PRL Shift Yesterday AfternoonRyan

SSA forward power faults

Ryan
  • More reactive power fractions has led to more forward power faults
  • Ryan is somewhat worried that maybe in this scenario the controller can raise the max above the specified SSA max

SBLM signal and field emission

Ryan
  • Making plot tracking gun SBLM signal with gun off but linac on
    • Ryan things field emission started mid september after accidental 4 K warm up

Action items

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