Author: Secondo, R.
Paper Title Page
WEPAB282 The Consolidation of the CERN Beam Interlock System 3309
 
  • R.L. Johnson, C. Martin, T. Podzorny, I. Romera, R. Secondo, J.A. Uythoven
    CERN, Geneva, Switzerland
  
  The Beam In­ter­lock Sys­tem (BIS) is a ma­chine pro­tec­tion sys­tem that pro­vides es­sen­tial in­ter­lock con­trol through­out the CERN ac­cel­er­a­tor com­plex. The cur­rent BIS has been in ser­vice since 2006; as such, it is ap­proach­ing the end of its op­er­a­tional life­time, with most com­po­nents being ob­so­lete. A sec­ond ver­sion of the Beam In­ter­lock Sys­tem, "BIS2", is cur­rently under de­vel­op­ment and will re­place the cur­rent sys­tem. BIS2 aims to be more flex­i­ble by sup­ply­ing ad­di­tional on-board di­ag­nos­tic tools, while also im­prov­ing the over­all safety by adding more re­dun­dancy. Cru­cially, BIS2 in­creases the num­ber of crit­i­cal paths that can be in­ter­locked by al­most 50%, pro­vid­ing an im­por­tant flex­i­bil­ity for fu­ture ad­di­tional in­ter­lock­ing re­quests. BIS2 will come into op­er­a­tion for the LHC in run 4 (2027) and will re­main in op­er­a­tion until the end of the planned life­time of HL-LHC. In this paper, we will focus on the Beam In­ter­lock Con­troller Man­ager board (CIBM), which is at the heart of BIS2. Since this mod­ule works closely with many other sys­tems that are sim­i­lar in de­sign to those in BIS1, we will com­pare how BIS2 im­proves upon BIS1, and jus­tify the rea­sons why these changes were made.  
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DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB282  
About • paper received ※ 18 May 2021       paper accepted ※ 14 July 2021       issue date ※ 23 August 2021  
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WEPAB284 Interlock System Upgrades at the CERN Accelerator Complex During Long Shutdown 2 3316
 
  • J.A. Uythoven, A. Antoine, C. Martin, A. Mirana Fontan, R. Mompo, I. Romera, R. Secondo
    CERN, Geneva, Switzerland
  
  The CERN ac­cel­er­a­tor com­plex stopped op­er­a­tion at the end of 2018 for the Long Shut­down 2 (LS2), al­low­ing for the LHC In­jec­tor Up­grade pro­gram (LIU) and con­sol­i­da­tion work to be ac­com­plished. A grad­ual restart of the dif­fer­ent ac­cel­er­a­tors is on­go­ing in 2021, cul­mi­nat­ing with the LHC fore­seen to be back in op­er­a­tion early 2022. Dur­ing LS2 a very large range of sys­tems was mod­i­fied through­out the ac­cel­er­a­tor com­plex. This in­cludes the so-called Ma­chine In­ter­lock sys­tems, which are at the heart of the over­all ma­chine pro­tec­tion sys­tem. This paper gives an overview of the Ma­chine In­ter­lock sys­tems changes dur­ing LS2. It in­cludes the in­stal­la­tion of a Beam In­ter­lock Sys­tem (BIS) at the new lin­ear ac­cel­er­a­tor LINAC4, at the PS-Booster and the in­stal­la­tion of a new In­jec­tion BIS for the SPS syn­chro­tron. New Safe Ma­chine Pa­ra­me­ter flags to pro­tect the SPS trans­fer line mo­bile beam dumps against high in­ten­sity beams were put in place. The new Warm Mag­net Con­troller (WIC) in­stal­la­tions at LINAC4 the PS Booster and the dif­fer­ent trans­fer lines and ex­per­i­men­tal areas are pre­sented to­gether with the mod­i­fi­ca­tions to the Power In­ter­lock Con­troller pro­tect­ing the LHC su­per­con­duct­ing mag­nets.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB284  
About • paper received ※ 17 May 2021       paper accepted ※ 02 July 2021       issue date ※ 17 August 2021  
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