Date

Attendees

Goals

Discussion items

TimeItemWhoNotes
5minSRF HourDan
  • Decided to take SRF hour off calendar

  • We can ask Yuantao for time as needed
5minLLRF PAMM UpdatesJing
  • CM 8, 9, 16, 17, H2 were disconnected completely and reconnected during PAMM

  • We should be able to switch these out of maintenance during turn on

  • Some unstable cavities may have been due to lose connections internal to rack/chassis
  • Sonya is rolled out detune compensation to all cryomodules this PAMM

10minRecovery/CM01All
  • Dan wants to look closer at CM01 during recovery / We should keep an eye on CM01 during turn on.
  • Three cavities in CM01 quenched right before the PAMM when gun tripped off due to vacuum.
  • There was no vacuum activity in the cavities, but at 1am the same cavities quenched off (even though beam was off).
  • Lisa made the call to keep the cavities off since there was no beam program.
  • Sebastian also investigated and saw no vacuum activity in CM01 as well.
  • All cavities tripped off both times, but only a few real quenches.
  • Dan saw no sign of activity from cryo though, no sloshing, nothing on pressure sensors either.
  • Ryan – 1,3 were a weird data mix up on the second quench. Not real.
  • Nicole/Lauren – Will check solenoid setting during this time to see if that may have changed dark current.
1minCM35/radiationAll
  • Sebastian – CM35 radiation level has dropped in new RP survey.
  • Dan – every PAMM put the decarad somewhere new and check CMs.
1minPPS DoorDan/All
  • Who is responsible between L3/L4? Is it Lauren’s job? Consensus was, Yes.
  • Question of the PPS door in sector 7/8
  • It was decided it will move, but not over a cryomodule.
1minMiscAll
  • PIV drama, should be fine
  • Lisa is going to jlab for Q measurements? Schedule is unclear.
2minWater flow on collimatorsLauren
  • Lauren, there was not water flow in the collimators.
  • There needs to be an error analysis / figure out how we can prevent this.
  • Learn how to do ultrasonic flow measurement.
  • Have techs check water flow after installation? 
  • Solution TBD after Lauren's meeting

Action items

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