BGI power converters

Name: BGI power converters
Start: 2025-06-20T10:00:00+02:00
End: 2025-06-20T10:30:00+02:00
Location: No location set

Friday 20 Jun 2025, 10:00 → 10:30 Europe/Zurich

- 10:00 → 10:20
  Discussion on Power Converters for BGI 20m
  
  Speaker: Yves Thurel (CERN)
  Present (list not exhaustive)
  
  Yves Thurel, Gilles Le Godec, Valerie Montabonnet, Dominique Bodart, James Storey, Thibaut Lefevre , Gunn Khatri
  
  Discussion
  
  BGI is discussed by zoom with BI, EPC, and MSC. Current proposition from MSC (Dominique) fits the current available and seems rather optimized, since using 4x LHC600A-40V, available from BBLR converters being dismantled in LS3, and 4x [125A 125V] from EPC, currently installed in LHC (but not used for LHC BGI).
  
  EPC Indicates:
  
  For LHC600-40V: in LS3, work is to move converters pt 1 and pt 5 to pt 4, and to connect them to services (water, Worldfip, AC, DC, WIC)
  
  For [125V 125A], remove them (potentially in YETS 2025-2026) to upgrade them in surface (new electronics), and to reinstall them during LS3
  
  It is not entirely clear where all the converters will be finally installed for HL-LHC BGI. It is currently assumed [125V; 125A] won't move, and LHC600A-40V will be installed close to them
  
  It is understood from MSC that DC Cables are already in place and compatible with HL-LHC BGI powering (requiring 2 pairs of cables per system).
  
  ECR is discussed (will be required), and may be under the responsibility of Gunn (BI), with inputs from EPC on converters.
  
  WIC / PIC is discussed as well and will need some attention.
  
  EPC insists on fact LHC BBLR converters must be free (BBLR to be stopped as they are today, so that the 4x LHC600A-40V can be used for BGI). Email from Adriana below, received after this meeting clarifies this point.
  
  Regarding budget, EPC will use the BC 64012 HL_LHC_BGI (Resp. SY/BI) for any EPC work.
  
  De: Adriana Rossi <Adriana.Rossi@cern.ch>
  
  À: Yves Thurel <Yves.Thurel@cern.ch>, Gilles Le Godec <Gilles.Le.Godec@cern.ch>, Valerie Montabonnet <Valerie.Montabonnet@cern.ch>, Dominique Bodart <Dominique.Bodart@cern.ch>, Daniel Schoerling <Daniel.Schoerling@cern.ch>
  
  Cc: Guido Sterbini <Guido.Sterbini@cern.ch>, Stefano Redaelli <Stefano.Redaelli@cern.ch>, James Storey <james.storey@cern.ch>, Thibaut Lefevre <Thibaut.Lefevre@cern.ch>, Raymond Veness <Raymond.Veness@cern.ch>, Yannis Papaphilippou <ioannis.papaphilippou@cern.ch>, Alessandro Bertarelli <Alessandro.Bertarelli@cern.ch>
  
  Objet: Email agreement to confirm availability of BBLR power converters for HL-LHC BGI after LS3
  
  Date: 20/06/2025 12:01:51
  
  Dear all,
  
  As discussed with some of you already, I would like to confirm that the 4 BBLR power converters (600Ax40V) currently installed in UL14 and UL16 in P1 and USC55 in P5, will be removed during LS3 and become available for the BGI at HL-LHC.
  
  With kind regards,
  
  Adriana for the BBWC (Beam Beam Long Range Wire Compensator) team