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103rd BLM Thresholds Meeting (changes during YETS and system readiness)

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865/1-B03 (CERN)

865/1-B03

CERN

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Anton Lechner (CERN), Belen Maria Salvachua Ferrando (CERN), Daniele Mirarchi (CERN), Sara Morales Vigo
103rd BLM Thresholds Meeting
Zoom Meeting ID
68180296658
Host
Sara Morales Vigo
Alternative host
Anton Lechner
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  • B.Salvachua - Changes on the LHC BLM system during YETS
    • New BLM installations during EYETS 24-25
      • TWOCRYST, two new BLMs, one downstream splitting crystal (TCCS) and another one downstream precesion crystal (TCCP)
        • Not interlocked
        • Channel for TCCP crystal reused from BLM at TCSM empty slot
        • Installation and motivation for experiment in ECR...
      • BGC, installation of two BLMs to investigate possibility to use it for beam halo monitoring
        • Not interlocked
        • Installation and motivation in ECR...
      • RF cavities, relocation of three BLMs and installation of two additional ones around the cryo-module 1 - Beam 2
        • Were not interlocked and will not be now 
        • ECR under preparation
        • Cables now routed on the protection to shield from noise
      • TDIS 4L2, one BLM that had to be displaced by 66 cm
        • Modification of expert name to reflect the modification of dcum
        • No modification of thresholds
      • MKIA MKIB in IP8, removal and reinstallation of 4 BLMs in the same locations
        • No changes
      • LESS solenoid installation, removal and reinstallation of 2 BLMs in the same locations
        • No changes
      • Question from Cedric about timeline for LIC detectors
        • Belen says that Sevgi is performing LIC and IC simulations to verify conversion factors and signals 
        • Action: Check if some of the LIC detectors are already interlocked in injection areas, and what is the thresholds
      • Question from Daniele about dBLMs in IP3
        • Belen says that they have been installed, details about high and low gain channels will come
        • Logging already in place
        • The card was taken from SPS and cables from collimators
      • Question from Daniele about interlock on TWOCRYST BLMs
        • Concerned that if they are not interlocked, if there are problems with the reversal after MDs, it will not be noticed easily
        • Possibility to interlock BLMs and put thresholds to the maximum for situations like these
          • Decision -> This will be the case for the TWOCRYST BLMs

 

  • S.Morales - LHC BLM system readiness for 2025 first beam
    • Redundant 100Hz logging -> logged now by BLM per crate, also from Collimation
      • Build crontask to verify logging
    • Beam expected in 14 April
    • Latency tests: Check the note LHC-BLM-NOT-0008 with Daniele.
      • Latency in the ARC not tested
    • Cedric: Checklist in MPP
    • Cedric: in Friday there will be an update on the checklist

 

Next meeting 8th April - in the control room.

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