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To be scheduled for discussion:

 

20.04.

  • MPS readiness for intensity ramp-up + checklist - MPP + all
  • AOB: ADT vs e-cloud measurements - test proposal - M.Wendt, D.Valuch
  • AOB: Abort Gap Keeper - protection of fine delay parameter - N. Magnin, J. Wenninger - tbc

27.04.

  • MKB re-triggering: motivation, technical implementation, reliability analysis and expected energy deposition on dump block as function of triggering delay between MKBs and MKDs - C. Wiesner - 30min
  • AOB: Abort Gap Keeper - protection of fine delay parameter - N. Magnin, J. Wenninger - tbc

18.05.

  • SPS: BLM near miss event after HW change affecting septum - PM analysis of event and proposed improvements - V. Kain
  • SPS crab cavity test stand - results of interlock test and readiness for experiments with beam - G. Vandoni
  • Report on direct dump BLM tests and proposal for updated procedure - W. Bartmann
  • AOB: Improved abort gap cleaning and shift of first bunch to avoid residual captured beam in the abort gap - J. Wenninger
  • AOB: Proposed update of BLM thresholds in collimators for steady state losses - A. Mereghetti

08.06.

  • Recent AFP issues, status of the analysis, repairs and the precautions for the future- M.Trzebinski , M. Rijssenbeek
  • AOB: Intensity ramp-up proposal and re-validation requirements after TS1 - J. Uythoven, S. Redaelli et al

13.07.

  • Experience with crab cavities during first set of MDs, status of low level RF and (fast) interlocks - R. Calaga
  • Observed and tested failure cases of CC in SPS - time scales and criticality - B. Lindstrom
  • Machine protection requirements for crab cavity MDs with unsafe beam intensities - D. Wollmann, M. Zerlauth - tbc
  • Review and proposed changes of OP procedure in case of non working beam dump - M. Solfaroli - tbc
  • AOB:

17.08.

  • Slow extraction MD in the SPS using octupoles to manipulate the shape of the extracted separatrix in phase space - M. Fraser
  • AOB:

31.08.

  • Fast failure due to triplet event (03.06., 19:28): the beam view - B. Lindstrom
  • Fast failure due to triplet event (03.06., 19:28): the magnet view - E. Ravaioli
  • SPS vacuum issue: wrong tune trim causing instability and drilling hole in SPS with 2.3e13 @400GeV in MBB.33130 (20.08.2018) - event analysis and possible mitigations - V. Kain et al. - tbc
  • AOB: changes in AFP during TS2 and revalidation requirements - M.Trzebinski , M. Rijssenbeek
  • AOB: changes in TOTEM / CT-PPS during TS 2 and revalidation requirements- M. Deile
  • AOB: Required revalidation after TS2: loss maps, asynchronous dump tests, intensity ramp-up etc
  • AOB

14.09.

  • Update of procedure in case of a non-working beam dump - M. Solfaroli
  • Fast failure due to triplet event (03.06., 19:28): update on the field simulations - E. Ravaioli
  • AOB:

28.09.

  • Summary of MKBV flashover (14.7.2018) and implications for the LHC dilution failure cases - C. Wiesner
  • SPS-CC: plans for the October MDs, additional interlocks etc. - R. Calaga, L. Carver
  • Update of machine protection requirements for high intensity operation with CC in the SPS - D. Wollmann
  • AOB: EOF-Beam-beam wire MD - Y. Papaphilippou, A. Rossi, G. Sterbini
  • AOB:

12.10.

  • AOB: Conclusion from asynchronous dump tests after TS2 - C. Bracco, W. Bartmann - TBC
  • Conclusion from loss map validation after TS2 - S. Redaelli, R. Bruce - TBC
  • MPP proposal for Pb-Pb intensity ramp-up - J. Uythoven, J. Wenninger, D. Wollmann, M. Zerlauth
  • BLM threshold changes for ion run - T. Medvedeva, A. Lechner
  • AOB

29.10. Joint CollWG - MPP

  • Crystal collimation tests with heavy ion beams - D. Mirarchi
  • Crystal goniometer performance - M. Butcher
  • Crystal irradiation tests at HiRadMat - M. Garattini
  • Inputs from OP - B. Salvachua
  • Inputs from MPP - D. Wollmann
  • AOB

09.11.

  • HL-LHC: Remote alignment of Q1 to Q7 in IR1/5 in HL-LHC and MP requirements - P. Fessia
  • ION MD4746: BFPP quench limit - M. Schaumann
  • ION EOF (MD4168): crystal collimation with Pb ions - S. Redalli / D. Mirarchi
  • ION MD4830: Assessing collimator coating robustness - A. Mereghetti
  • AOB
 

14.12.

  • LHCb: plans for SMOG2 detector - Pasquale di Nezza
  • Plans of using Beam-Beam Long-Range (BBLR) compensators in B1 and B2 during high intensity operation - impact on interlocking and protection strategy - A. Rossi
  • New DiDt interlock for SPS: planned technical implementation, thresholds and protection scenario - K. Bruce Li - TBC
  • AOB

11./18.01.2019

  • LHCb: problem with velo movement - overview of issue, solution and possible future improvements - F. Alessio - tbc
  • New logic for collimator temperature interlock logic (check gradients, check consistency of different two beams) - A. Masi - TBC
  • AOB

Topics for 2018

  • LHCb: plans for SMOG2 detector - Pasquale di Nezza
  • LHCb: problem with velo movement - overview of issue, solution and possible future improvements - F. Alessio
  • LHCb: plans for update of VELO during LS2 and impact on interlocking strategy - F. Alessio et al.
  • Follow-up: Plans of using Beam-Beam Long-Range (BBLR) compensators in B1 and B2 during high intensity operation - impact on interlocking and protection strategy - A. Rossi
  • New DiDt interlock for SPS: planned technical implementation, thresholds and protection scenario - K. Bruce Li
  • New logic for collimator temperature interlock logic (check gradients, check consistency of different two beams) - A. Masi
  • Injection incident following high beta run with crystal collimators - S. Redaelli
  • LMC action: Review operability of all moveable devices in the LHC - MPP
  • SPS and TL BLMs, gain setting pbm - analysis and mitigation - E.Effinger, C.Zamantzas
  • Follow-up: New design of interlocked BPMs in IR6 - operational requirements M. Wendt / T. Lefevre / OP / MPP
  • New interlock on SPS timing system (watchdog replacement) for beam dump, BLM and main power supplies - G. Kruk - end March?
  • SPS -BLMs: present configuration, changes to be conform and estimate of investment required (BE-BI) - March 2018
  • SPS -BLMs: non-conformities and investment for additional connections (TE-MPE) - March 2018
  • SPS -BLMs: how present BLMs are used in the SPS / threshold changes and possible damage if BLM interlock does not work (BE-OP) - March 2018
  • New architecture for the SPS injection BIS and impact of SPS beam dump upgrade on BIS and WIC - I. Romera --> end Febr.
  • Exercising of all BIS inputs (C.Martin)
  • Safe software development for operatinal systems, including testing in general purpose network, use of MPE interlock test bed etc. - L. Sero / M. Zerlauth / J.C. Garnier / K. Fuchsberger - tbc
  • BCCM development: status and plans - T. Lefevre, M. Gasior--> mid 2018
  • Persistence of trimable SMP parameters (SPS & LHC) - I. Romera, J.C. Garnier
  • Status of IQC and future development ( Injection diamonds, ... ) - M. Pojer
  • True redundancy of BIS power supplies (problem with primary side faults), e.g. event in IR6 - Redundant supplies for trigger delay boxes - BIS team
  • Update of operational procedure in case of non working dump - M. Solfaroli - tbc
  • (Modifications to the existing BLM electronics during LS2 - status and plans - C. Zamantzas)
  • (Coherence of Exp. BCM and sourrounding BLM thresholds - A. Lechne)r
  • (MP relevant External conditions and possible implementation in BIS? - J.C. Bau et al --> Markus?)
  • (Summary of accidential high intensity beam impacting in ISOLDE, mitigations and possible interlock - NN --> Markus?)
  • (Intensity based interlocking of SPS extractions (AWAKE vs FT & LHC,...) - V. Kain et al)
  • BLM thresholds - after LS2: flattening out of BLM thresholds in long running sums for all energy levels above 450 GeV - A. Lechner --> mid 2019

Topics for Machine Protection Workshop in 2019

  • Controls software for Collimators and XRPs

Topics for 1/2 day workshop on HL-LHC Machine Protection

  • Fast failures for HL-LHC - D. Wollmann / M. Valette
  • Effect of D1, Q4, Q5 powering failures on orbit - M. Valette / B. Linstrom - tbc
  • MP failure case matrix for crab cavities after baseline change
  • SPS CC failure cases and their criticality - B. Lindstrom / M. Valette
  • SPS CC planned machine protection tests - B. Lindstrom / M. Valette
  • HL-LHC: effect of spurious quench hetaer and CLIQ firing on beam and need of beam interlock - M. Valette

Tbd:

  • New BLM electronics - specifications, status and plans - C. Zamantzas (major upgrade of BLM electronics postpone to LS3)
  • HL-LHC MP: Halo supervision, possibilities/requirements for diagnostics, plans & outlook (BI)
  • (CMS BCM thresholds comparison with LHC BLMs (EDMS Doc. Nr 1502426) - M.Guthoff)
  • (New logic for collimator temperature interlock logic (check gradients, check consistency of different two beams) - A. Masi )
  • Remote monitoring for beam presence in the CCC (I. Romera)
  • Additional running sum in BLM PM data
  • (Ion/Proton interlock for SPS extraction (comment from M.Lamont - might be part of new SPS QC?!) --> Markus?)
  • (SW change procedure (tracking changes in MPS and SW components) --> Markus?)
  • (SPS extraction interlock (follow-up with timing and SPS OP) --> Markus?)

 


Last updated 10-Dec-2018 16:11