LHC FBs - weekly meeting

Tuesday 24 Mar 2020, 09:30 → 10:30 Europe/Zurich

Skype

Meeting Date: 24-Mar-20 09:30

Location: Skype

Link to Outlook Item: click here

Invitation Message

Participants

 Diogo Miguel Louro Alves (Meeting Organizer)

 Leander Grech

 Andrea Calia

 Michi Hostettler

 Jorg Wenninger

 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