LHC FBs - weekly meeting

Europe/Zurich
Skype

Skype

Meeting Date: 24-Mar-20 09:30

Location: Skype

Link to Outlook Item: click here

Invitation Message

Participants

In Attendance Diogo Miguel Louro Alves (Meeting Organizer)

In Attendance Leander Grech

In Attendance Andrea Calia

In Attendance Michi Hostettler

In Attendance Jorg Wenninger

In Attendance Stephen Jackson

Notes

  • DA + LG reported on the latest progress on the BFCLHC (Fesa) side
    • Re-engineered optics handling
    • Implemented FB on/off commands and respective acquisitions for the orbit, energy and radial loops
    • Implemented resets for the orbit, energy and radial loops
    • Moved most of the fields in the original Settings property to the appropriate Cmd/Settings/Acquisition property according to the relevant feedback loop
    • DA: suggested a series of tests that already be performed including testing all matrix values (RM + U + S + V) but also some function player functionalities like setting up reference orbit and optics changes, arming and playing these back
  • BFCLHC sanity check of twiss parameters
    • SJ: suggested that it would be nice to have sanity checks for the uploaded twiss values
    • JW: agrees that it may be possible to do it but not straightforward and requires some thinking
    • SJ: it's still possible to implement the mechanism to do it even if the sanity limits are still to be defined
    • Action - DA + LG: check code and make a proposal for implementing this
  • BPM concentration Vs BPMs used for feedback
    • AC: asked if we can remove the BPMWF BPMs
    • JW: mentioned that for the logging it's nice to have this data available for the users, also for backward compatibility
    • AC + MH + JW discussed different possibilities to manage the addition of these BPMs to YASP so that both the testing works and YASP remains neat and manageable
      • In the end, we all agreed to investigate the possibility of having the feedback and concentration functionalities detached and independent from each other
    • Action - DA + LG: check code for the feasibility of logging all BPMs in mapping but disabling some for the FBs (extra column in .mapping file) - of course, if RM now becomes smaller, this is a strong motivation for eradicating the bootstrap file altogether
  • Generation of BPM mapping file from LSA
    • SJ: suggested that BPM mapping file could be generated from a database (maybe LSA?). Also suggested that a meeting with Manuel Berges could be useful in order to understand where all the BPM information can be extracted from
    • MH: asked whether these mapping/calibration files should be version controlled
    • JW: clarified that these files are already version controlled under an OP project in gitlab
    • JW: mentioned he can extract this info from LSA and build the BPM2CRATE mapping file
  • Planning
    • SJ: asked about the plans for more ambitious refactoring of the FESA side of the LHC feedbacks regarding
      • Bootstrap file
        • DA: still on my backlog to remove it
      • Eradicate Root
        • DA: very much desirable but requires prior agreement on a BFCLHC version that can be used for the next restart. I.e. we need excellent code coverage and test validation of a BFCLHC version before moving on with this more ambitious refactoring
  • Management
    • SJ: suggested having an indico page for the meeting where we can at least put meeting notes
    • AC: suggested meeting notes can also be added to gitlab doc repo for the LHC feedbacks
    • Action - DA: create indico page, add meeting notes and send link to all
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