Floating MD results

Name: Floating MD results
Start: 2022-07-21T09:30:00+02:00
End: 2022-07-21T12:10:00+02:00
Location: No location set

Thursday 21 Jul 2022, 09:30 → 12:10 Europe/Zurich

Remote meeting (zoom)

Giovanni Iadarola (CERN), Jan Uythoven (CERN), Matteo Solfaroli Camillocci (CERN)

65133836931

Giovanni Iadarola

Join via phone

- 1
  
  Introduction
- 2
  MD#6863: Amplitude Detuning Corrections from Feed-Down
  
  [10' presentation + 5' discussion]
  
  Speakers: Ewen Hamish Maclean (CERN), Joschua Werner Dilly (Humboldt University of Berlin (DE))
  
  pres_22_07_21_lswg_md6863.pdf
  Notes:
  
  Main objectives of MD achieved
  
  Not urgent to deploy these corrections in operation, but could be done at some point
- 3
  MD#6944: Voltage calibration with beam
  
  [10' presentation + 5' discussion]
  
  Speaker: Helga Timko (CERN)
  
  LHC_RFMD_FMD_2022.pdf
  Notes:
  
  Main objectives of MD achieved
  
  Measured voltage calibration could be folded in the operational settings
- 4
  MD#6949: Validation of bunch-by-bunch detectors functionality
  
  [10' presentation + 5' discussion]
  
  Speakers: Eva Calvo (CERN), Sara Morales Vigo (University of Liverpool (GB))
  
  20220721_MD_6949_first_report.pdf
  
  20220721_MD_6949_first_report.pptx
  Notes:
  
  Main objectives of MD achieved
  
  Need a second session to test improvements on the firmware and other functionalities
  
  Potentially very useful tool, interest from other MD users
- 5
  MD#6807 & MD#6803
  - MD#6807: Slow vs fast octupole scans in nominal conditions
  - MD#6803: BTF for Chromaticity Measurements
  [15' presentation + 5' discussion]
  Speaker: Lorenzo Giacomel (CERN)
  
  instabilities_floating_MDs.pdf
  Notes:
  
  Main objectives of MDs achieved
  
  BTF studies to be continued with tests at high energy
  
  Octupoles stability threshold seems lower compared to Run 2, to be investigated
- 6
  MD#6843 & MD#6924
  - MD#6843: Methods for non-linear optics correction at small action
  - MD#6924: Slow beam degradation from incoherent electron cloud effects - preparation
  [15' presentation + 5' discussion]
  Speakers: Ewen Hamish Maclean (CERN), Konstantinos Paraschou (CERN)
  
  20210721_LSWG_MD6924.pdf
  
  2022-07-21_LSWG_FMD1-results.pdf
  Notes
  
  Focused on 3Qy resonance characterization and correction
  
  Could achieve very good correction
  
  Low-action studies to be finalized in a future session (few hours on one beam at injection)
  
  Could be combined with other optics studies at injection that will be requested for the future
- 7
  MD#6823: UPS noise and ADT
  
  Speakers: Guido Sterbini (CERN), Sofia Kostoglou (CERN)
  
  LSWG_MD6823_results.pdf
  
  LSWG_MD6823_results.pptx
  Notes:
  
  Could not observe the 8kHz cluster with low intensity at injection
  
  Still changes in the spectrum could be identified when modifying the UPS configuration
  
  Proposal: MD in the next block, or End-Of-Fill test
  
  Risks to be assessed with rMPP
- 8
  
  MD#7008: Validation of method to measure aperture margin between IR6 and TCTs with non-nominal phase advance
  
  Speaker: Cedric Hernalsteens (CERN)
  
  md7008-3.pdf
  
  md7008-3.pptx