234th Machine Protection Panel Meeting (LHC)

Friday 24 Mar 2023, 10:00 → 12:20 Europe/Zurich

Daniel Wollmann (CERN)

20230324_Minutes_MPP234_Vers1_0.docx

20230324_Minutes_MPP234_Vers1_0.pdf

1 Minutes and actions

Speaker: Daniel Wollmann (CERN)

2 Proposal for 2023 intensity ramp-up

Speaker: Christoph Wiesner (CERN)

2023-03-24_Wiesner_MPP_IntensityRampUpProposal_Vers1_0.pdf

2023-03-24_Wiesner_MPP_IntensityRampUpProposal_Vers1_0.pptx

3 2023 machine revalidation strategy

Speaker: Frederik Van Der Veken (CERN)

4 Change of injection optics with phase advance knob

Speakers: Frederik Van Der Veken (CERN), Konstantinos Paraschou (CERN)

20230324_MPP_injection_knob.pdf

20230324_MPP_injection_knob.pptx

LossMaps_InjProt.pdf

Readiness for first beam

5 BIC, PIC, WIC, FMCM, SMP

Speaker: Raffaello Secondo (CERN)

2023_MPE-MI_LHC_Systems_RSecondo.pdf

2023_MPE-MI_LHC_Systems_RSecondo.pptx

6 Beam Loss Monitor system

Speaker: Mathieu Saccani (CERN)

20230324_MPP_LHCBLM_readiness.pdf

20230324_MPP_LHCBLM_readiness.pptx

7 Injection & LBDS

Speaker: Yann Dutheil (CERN)

8 Collimation

Speaker: Daniele Mirarchi (CERN)

MPP_234.pdf

MPP_234.pptx

9 Vacuum System

Speaker: Gregory Pigny (CERN)

MPP_Vacuum_Readiness_24.03.2023.pdf

MPP_Vacuum_Readiness_24.03.2023.pptx

10 ADT

Speaker: Prof. Daniel Valuch (CERN)

All amplifiers in the tunnel checked, and tube transfer functions measured, all 16 OK

Control from the CCC application functioning (few things needed to be sorted out by Delphine)

Abort gap and Injection gap cleaning tested

All LLRF power cycled to be ready with RF clocks

 

ADT is go for start up.

11 TOTEM/CT-PPS

Speaker: Mario Deile (CERN)

mpp_20230324.pdf

12 ALFA/AFP

Speaker: Marko Milovanovic (CERN)

BIS_ARP_2023-UpdatedDraft.pdf

Both ALFA and AFP fully commissioned/qualified by a full set of movement system tests and ready to be inserted for first beams in 2023.

1. Test of injection permit (lost when pot moved outside of HOME position) - no failure observed.
2. Test of the response to the LVDT-to-limits comparison (inner dump and warning limits) - no unexpected behavior observed.
3. Test of User_Permit and automatic pot extraction as a function of all input flags - test omitted (done in 2022) since there were no changes in the LHC interlock system concerning input flags (decided by MPP to be dropped).
4. Test of the LVDT bypass box - no failure observed.
5. Test of Hardware and Software buttons (extraction by DCS & emergency extraction by HW button) - AFP reacted as expected, ALFA failed due to an older PXI crate type, as expected; no failure observed.

MPP checklist signed-off in the commissioning tool. All tests summarized in the attached draft EDMS; final version to be sent around (also updated in the agenda).

13 SIS

Speaker: Jorg Wenninger (CERN)

14 AOBs