rMPP meeting on MD Block 3 (2024) approval

Friday 9 Aug 2024, 10:00 → 11:30 Europe/Zurich

Zoom

You can find more information on the website of the Machine Protection Panel.

20240809_Minutes_rMPP_Vers1_0.docx

20240809_Minutes_rMPP_Vers1_0.pdf

10:00 → 10:05 Introduction¶

Speakers: Christoph Wiesner (CERN), Jan Uythoven (CERN)

10:05 → 10:20 rMPP comments on MDs¶

Comments on MDs:
- MD9325 Beam halo population
- MD11843: Collimation performance with HL-LHC settings
- MD6925: Electron cloud coupled-bunch tune shifts at injection
- MD12743: RF power limitations for high-intensity batches
- MD12805: Impact of longitudinal impedance and betatron coupling on the Schottky spectrum

Speakers: Cedric Hernalsteens (CERN), Christoph Wiesner (CERN), Daniel Wollmann (CERN), Jan Uythoven (CERN), Matteo Solfaroli Camillocci (CERN)

2024-08-09_rMPP_comments_MD3_2024.pdf

2024-08-09_rMPP_comments_MD3_2024.pptx

10:20 → 10:30 MD12663: Wire compensation during the beta*-leveling¶

• Loss maps to be done before. When and approval of it?
• Why does the PCinterlock of the wire need to be masked at 30 cm only? Is this ok with that many bunches?
• Clarify the order of loss maps, change of collimator settings, change of wire settings and scraping.
• Masking of interlocks to be defined for each step.

Speaker: Guido Sterbini (CERN)

rMPP_09_August_2024.pdf

10:35 → 10:45 MD12723: HL-LHC optics cycle (part II)¶

• Clarify number of pilots and total intensity for validation
• Specify tools to be used for optics measurements (AC-dipole etc.)
• Third ramp with loss maps, can take two nominals and pilots to stay below 3e11 total. However, aperture checks with nominals is risky.

Speakers: Riccardo De Maria (CERN), Rogelio Tomas Garcia (CERN), Tobias Hakan Bjorn Persson (CERN)

HL-LHC optics cycle (part 2) MD_ rMPP (1).pdf

HL-LHC optics cycle (part 2) MD_ rMPP (1).pptx

10:50 → 11:00 MD12844: Faser background mitigations¶

• Clarify the masking in the procedures, including collimator threshold.
• Detail the rotation of the crossing angle, including which tools to be used.
• Change of beam flags and interlocks should be YES

Speaker: Bjorn Hans Filip Lindstrom (University of London (GB))

20240809_rMPP_MD3.pdf

20240809_rMPP_MD3.pptx