260th Machine Protection Panel Meeting (LHC)

Name: 260th Machine Protection Panel Meeting (LHC)
Start: 2025-05-02T14:00:00+02:00
End: 2025-05-02T16:00:00+02:00
Location: CERN

Friday 2 May 2025, 14:00 → 16:00 Europe/Zurich

874/R-018 - salle de réunion activité CCC (CERN)

874/R-018 - salle de réunion activité CCC

CERN

Show room on map

Daniel Wollmann (CERN), Matteo Solfaroli Camillocci (CERN)

Description

The 260th MPP will take place in room 874/R-018 and on Zoom.

Please note the unusual time!

External references

3295008
260

- 14:00 → 14:05
  
  Minutes and actions¶ 5m
  
  Speaker: Daniel Wollmann (CERN)
- 14:05 → 14:25
  
  Luminosity levelling with crossing angle anti-levelling¶ 20m
  
  Speaker: Michi Hostettler (CERN)
  
  202505_CrossingAngleLevelling_MPP.pdf
- 14:35 → 16:00
  Readiness for first stable beams¶ 1h 25m
  
  Speakers: Andy Butterworth (CERN), Cedric Hernalsteens (CERN), Christos Zamantzas (CERN), Daniele Mirarchi (CERN), Gregory Pigny (CERN), Ivan Romera Ramirez (CERN), Jorg Wenninger (CERN), Maciej Trzebinski (Polish Academy of Sciences (PL)), Mario Deile (CERN), Mario Deile, Natalia Triantafyllou (CERN), Sara Morales Vigo (CERN), Yann Dutheil (CERN)
  - BLM system¶ 5m
    
    Speakers: Christos Zamantzas (CERN), Sara Morales Vigo (CERN)
    
    20250502_MPP_BLM_Sara_Morales.pdf
    
    20250502_MPP_BLM_Sara_Morales.pptx
  - BIC, PIC, WIC, FMCM, SMP¶ 5m
    
    Speaker: Ivan Romera Ramirez (CERN)
    
    2025_May_MPP_Interlocks.pdf
    
    2025_May_MPP_Interlocks.pptx
  - Injection & LBDS¶ 5m
    
    Speaker: Yann Dutheil (CERN)
    
    Injection
    
    All OK, but a few remaining aspects
    
    MKI waveform measurement remain to be done before physics. On P8 following MKI-cool replacement : Waveform OK on IPOC, measurement with beam at 7.8us pulse length planned tomorrow.
    
    Blindable BLM validation in P2&8 -> coordinated by BI-BLM
    
    Note that similar to 2023 the TCDIL collimator 29206 is measured with lower than expected apertur and may require adjustment if injectoin losses are too high (discussed here)
    
    LBDS
    
    ASDs remain to be done before physics
    
    Abord gap cleaning with increasing intensities
    
    TDE with
    
    Conclusion
    
    Ready for physics from ABT view after MKI8 wavfevorm and ASDs are completed
    
    IR6 BPMs tests with beam now completed by OP and an automatic tool here, faster and more rigorous than ever !
  - Collimation¶ 5m
    
    Speakers: Frederik Van Der Veken (CERN), Natalia Triantafyllou (CERN)
    
    MPP_2May2025_collimation.pdf
  - Vacuum system¶ 5m
    
    Speaker: Gregory Pigny (CERN)
  - RF & ADT¶ 5m
    
    Speaker: Andy Butterworth (CERN)
  - SIS¶ 5m
    
    Speaker: Jorg Wenninger (CERN)
    
    MPP.SIS-status-SB.May25.pdf
    
    MPP.SIS-status-SB.May25.pptx
  - CT-PPS¶ 5m
    
    Speakers: Mario Deile (CERN), Mario Deile
  - AFP¶ 5m
    
    Speaker: Maciej Trzebinski (Polish Academy of Sciences (PL))
    
    AFP did BBA at beta*=1.2 m:
    
    C FAR - XRPH.B6R1.B1: 2.33 mm (motor)
    LVDT: 2.19 mm
    
    C NEAR - XRPH.A6R1.B1: 2.82 mm (motor)
    LVDT: 3.00 mm
    
    A NEAR - XRPH.A6L1.B2: 2.13 mm (motor)
    LVDT: 2.16 mm
    
    A FAR - XRPH.B6L1.B2: 2.35 mm (motor)
    LVDT: 2.29 mm
    
    We observed the issue with A NEAR -> could not pass 1.78 mm step with collimator application (pot was retracted by motor). We solved it by switching to the standalone movement application (LabView) to finish BBA. Since data-takingposition is further away, it should not be an issue with movement, still it would be good to undestand the source of problem (sometime next week, in a period w/o beam (access?), with limits opened and override ON so we can move pots; once the PXI expert is back).
    
    Currently are doing loss maps, taking calibration data at various beta^* / crossing angle steps.
    
    AFP would like to confirm beam position (no changes expected from MAD-X studies) at beta^* 0.6/0.18 and theta_C = 160 µm and 120 µm which we think is the smallest crossing angle we will have.

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260th Machine Protection Panel Meeting (LHC)

874/R-018 - salle de réunion activité CCC

CERN