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    HL-LHC & EN-EL Monthly follow-up - July 2026

    → Europe/Zurich
    CERN

    CERN
    Davide Bozzini (CERN), Mario Parodi (CERN), Paolo Fessia (CERN)
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    Prepatory draft minutes (to be compiled and cleaned durind the meeting session)

    General agenda of recurrent meetings presented:

    • Overview of planning (short term and long term)
    • Integration
    • Power distribuiton
    • DC cabling
    • Decabling
    • Optical fibres
    • Cabling

    Planning:

    Integration: (detailed follow-up at the dedicated monday meeting)

    o   Cable trays to be lowered at the level of separation door: not yet defined to be re-discussed at the integration meeting.
    Probably solved. Still open and to be confirmed by Alejandro (CV)

    o   Flexwell cables: very fragile, HL asks to install as late as possible and after to protect with a cover. To be discussed later, Diogo is studying the planning (proposal: keep for next follow up meeting)

    Diogo to finalize the check of the design of the cable trays.
    The campaigns are scheduled; the dates will be adapted to the works in the URs.
    Joao will confirm that RF is going to purchase and install the patch panels.

    This activity can be prepared at \study level and kept as a wild card activity.

    o   Change in UPS size and proposed change in layout to be integrated and modifications required at the level of the hardware to be validated/integrated prior to execution. Integration done. Change in supporting structure will be done by EN-ACE under gluidelines of EN-EL (confirmed for point 1 and to be confirmed for point 5)

    Power distribution:

    o   EL to confirm the delivery dates of UPS and CPS, and to promptly report in case of delays, as the installation and commissioning dates have been booked in the planning 
    CPS: delivery confirmed, works scheduled.
    UPS delivered but some internal elements still pending (insulating transofrmers expected by mid september, delivery of battery still unknown). 

    DC cabling:

    o   Readiness of material: HL asks a status of the readiness and the procurement plan, to see if there are possible optimization or anticipation to the planning that can be proposed, as for WP6B some works related to the installation of the CDBs and power converters racks might be advanced as it is the case in L1 

    Installation of metallic structures in 1L done, WCC inserted in 1L. All material needed for all other points seems to be available including clamps. It would be useful to have a list of components readiness.
    General request of HL for the material of the full scope WP17 DC cables: all material must be ordered with the required notice, and the subcontracted material to CERN groups (MME, ACE) must be monitored as the priority for them is elsewhere

    o   Status of procurement of class 6 cables.

    DO done, company selected, DAI in the hand of purchasing service. Delivery not yet confirmed, problems on procurement of raw material encountered. The supplier proposed to provide a first batch. EN-EL-CS to chekc how much could be provided to then adapt installation schedule.

    New: contribution of Flohe 

    o   Cables for WCC temperature monitoring: integration Ok, missing the DIC to be launched 
    Action: EL-CS DC cables to send out the DIC, to be receive by the end of July to include the works in an existing campaign. Details of connections and functionality of these cables to be checked in the ECR, or sorted out if not there.

    o   Insertion of WCC on CDB: probably Flohe will perform the heavy work, to be clarifed. Presentation tp be prepared on this subject at a next HLTCM

    Two review meeting organised with Pauline. A robust planning related to WCC and ACC CL5/CL6 installation including metallic structures and Flohe and Comsa contribution has been defined. Validation and update of EN-ACE master schedule will be done by week 26. Works to start in point 5 in week 27.

    Decabling: no specific points to discuss

    Optical fibres: no specific points to discuss

    Cabling:

    • Cable CLIQ could be patched
      • A mockup wil be built with 6 connections to be tested and validated. Samples have been delivered to MPT for testing. Diogo will participate tothe testing planned by mid-august. EN-EL-CS will also plan some mechanicla test.
      • The document for the installation fo the new galleries segments can be prepared and be c onsidered as wild card for ressourses alignment.

    o  TE-CRG added cables for heaters for the RF cryomodules; the heat dissipation in the cores should be checked.

    New DIC from CRG shared for point 5 but the DIC for point 1 is not yet received and the announced EN-EL-CS dealine is set to mid september 2026.. EN-EL-CS is working on impact and implementation.
    LSS5L received and integrated, no impact on the space occupation (impact on type and quantity of cables). LSS5R ongoing.
    LSS1 other impacts as some cables are already installed, a “repairing” campaign could be required, an ECR could be necessary to track this additional slot in the planning.

    o   Progress report: The application developped by Doido and presented at the TCC is operationa and extremely usefull for the follow-up of cabling activities for HL. A meeting will be organised to review if there are changes/improvements to be implemente. Week 32.

    o   HL asks to get visibility on the cable availability Vs. the cabling campaigns, and to be notified with notice if some material is late. As the framework is complex (many stakeholders including manufacturers, CERN Store, EL logistic manager, EL cabling team) EL is working on a new application to improve the visibility on the procurement.

    An app as been developped to follow the follow-up of cable availability and procurement. IT is under evaluation between EN-EL and CERN store. Work in progress.

    o   Progress report on handover to users and acceptance of cables: The new app allows the status follow-up by each user. Planned in september to recall users they have n weeks for approve de deliverable, otherwise the approval will be forced. Action:

    o   CC35 and CC45. Towards completion of the scope. Issue with TC3 cable to be reconsidered. Fixation of cablesin ULs and UAs duly planned and will be done in the coming weeks.

    o   Additional rack space in UA17/UA13 to cope with additional space requirements asked by TE-VSC in the patch panel racks. Two plans under study a)vertical extensio b) additional side rack to be installed after core drilling. Point 5 problem has been anticipated.

    o   Additional hours for Comsa due to worksite unavailability: WU communicate to Diogo where to upload extra costs. HL asks to be informed as soon as a new requestwill be issued.
    NEW: double shift in september: The cables for TE-CRG have been implemented in this exercice. 3 weeks in single shift and 3 weeks in double shift on the same nature of works. This approach will allow camparing the two way of working. IT is requested to implement, once known, the two periods in the HL coordination daily calendar.

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