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Markus Zerlauth (CERN)09/09/2025, 08:30
This introductory talk will introduce the scope of todays 5th IT String day in light of the recent findings. The talk will also recap and reference the follow-ups done based on the recommendations of last years event, which was focused on achieving the completion of the IT String installation and prepare it for operation by the end of 2025.
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Marta Bajko (CERN)09/09/2025, 08:55
This talk will present the status of WP16. It will begin with an overview of the budget and organisational aspects, which remain in line with expectations and represent less than 1% of the overall project cost, despite a reduced SF team. The current status of activities will then be reported: all equipment has been installed, connected, and passed quality control, with the exception of the...
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Davide Bozzini (CERN)09/09/2025, 09:20
The presentation will cover the methodology and organizational structure behind the technical coordination of the HL-LHC IT String facility, which is nearly to completion. It will provide an in-depth update on the progress of the on-site construction and commissioning activities. Key lessons learned from the IT String's construction and commissioning will be shared, covering the technical...
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Jose Ferradas Troitino (CERN)09/09/2025, 09:45
In this presentation, we provide a summary of the installation of the cryomagnets for the IT string, along with the main lessons learnt. Special focus is placed on extracting the most important information relevant to the inner triplet installation during Long Shutdown 3 (LS3).
We begin with a brief introduction to the magnet system and its interconnections. The initial installation plan is...
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Jaime Perez Espinos (CERN)09/09/2025, 10:35
This presentation introduces the IT string insulation vacuum system and summarizes the status of the leak detection and tightness validation programs. After a brief reference to the vacuum equipment layout, we provide details about the vacuum equipment configuration during the commissioning phase, linking it to the recommendations and comments received during the IT string day IV. Then we...
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Lucie Baudin (CERN)09/09/2025, 11:05
This report provides an overview of the busbar and cold mass activities, with a focus on the work related to the Line N system. It begins with a general introduction to the layout of the busbars and cold masses, followed by a summary of the preparatory steps for Line N, its insertion process, and the key lessons learned.
A proposed modification to the busbar layout is then presented, aimed...
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Dr Christian Barth (CERN)09/09/2025, 11:40
The Cold Powering System of the ITS String was installed on the IT String 2024 – 2025. This presentation covers:
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Overview of the Cold Powering System
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Status of the Cold Powering System
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Activities since String Day IV
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Open points
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Vincent Thomas Barbarroux (CERN)09/09/2025, 13:30
The presentation will address the following topics:
- FRAS installation activities.
- FRAS commissioning
The presentation will cover the FRAS installation activities on the magnet line as well as the infrastructure for acquisition, control systems and quality. Key lessons learnt will be presented. FRAS commissioning activities and results will be presented. First lesson learnt will...
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Gregory Hugh West09/09/2025, 13:55
The ELQA campaign at the Inner Triplet String Facility aims to validate circuit integrity ready for safe operation, whilst also providing a valuable opportunity to collect reference data to support more reliable results validation and assist potential future fault localisation. The work has also allowed the ELQA team to refine procedures, equipment, software, and reporting based on real...
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Aleksandra Onufrena (CERN)09/09/2025, 14:20
The cryogenic system of the HL-LHC IT String was successfully commissioned in 2023-2024 in a standalone mode (without magnets and SC-link). In 2024-2025 the cryogenic system was prepared for the commissioning and operation of the HL-LHC IT String including all its components. This presentation covers:
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Follow-up on the comments from String Day IV
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Status of the cryogenic system
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Daniel Wollmann (CERN)09/09/2025, 14:45
This presentation will give an overview of the status of the installation and testing of protection equipment in the IT String and its controls integration. Furthermore, the foreseen tests at before and after cool-down will be addressed.
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Hugues Thiesen (CERN)09/09/2025, 15:30
This warm powering equipment talk presents the progress of the WCBB & WCP design and especially how the ElQA issue has been solved. Afterwards, the status of the HL-LHC String equipment is presented, in particular the restarting tests before the HWC of the HL-LHC String facility. Finally, the impacts of the new delay and the constraints on LHC operation and LS3 are discussed.
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Sebastien Blanchard (CERN)09/09/2025, 15:55
The status of the control systems and their interfaces is presented with a particular focus on the software layers essential for the powering and magnet protection tests during the IT String validation program. Ensuring integration of the new HL-LHC device types and their operational readiness requires close collaboration between development teams, equipment owners and the IT String operation...
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Lucia Herrero Alvarez (CERN)09/09/2025, 16:20
This presentation will introduce the role of the Analysis Software within the HL-LHC IT String Validation Program. The talk will highlight how this software is used to process and interpret data from the Hardware Commissioning (HWC) powering tests, which are essential to verify both the powering and protection systems of the new HL-LHC magnet circuits, as well as the overall circuit...
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Samer Yammine (CERN)09/09/2025, 16:40
The presentation recalls the IT String Validation Program phases and strategy including the Quality Control/Assurance steps, individual system tests, powering tests and string-specific tests. The presentation later shows the reasons behind the adequacy in terms of quench performance of considered solution on the magnet circuits following the String leak. Finally, the parameters for operating...
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09/09/2025, 17:15
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Aleksandra Mnich (CERN)
The Accelerator Testing framework has been used successfully to facilitate the execution and analysis of thousands of tests during the hardware commissioning campaigns of LHC and during its operations to qualify the powering systems. The presentation covers the extensions of AccTesting and its ecosystem needed to support the commissioning of IT String facility. Describes the framework that is...
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Yann Leclercq (CERN)
The presentation will address the following topics:
- Performance of the Prototype Cold Powering system
- Completed installation activities and lessons learnt
- Upcoming activities and interfaces
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Mateusz Jakub Bednarek (CERN)
The presentation will address the following topics:
- Status of the collaboration, (procedures, equipment, software...)
- Feedback of the experience of ElQA in the individual magnets and ScLink
- Plan and procedures for the IT String activities
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Gregory Hugh West
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Samer Yammine (CERN)
The Individual System Tests (IST) and the Short Circuit Tests (SCT) are important intermediary steps in the Hardware Commissioning (HWC) of the HL-LHC IT String. This talk gives an overview of the different IST and SCT planned for the warm powering system, the cryogenic system, the quench detection, and protection systems and the associated procedures. Moreover, the quality control steps and...
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Lucia Herrero Alvarez (CERN)
This presentation provides a comprehensive overview of the Quality Assurance and Control processes implemented in the HL-LHC IT String. It describes the management of non-conformities related to the test stand, adhering to the policies established by the HL-LHC Project. It explains the tracking process of the validation tests conducted during installation and commissioning of the equipment....
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Davide Bozzini (CERN)
The HL-LHC IT String safety strategy including the responsibilities will be recalled. The safety aspects applied during installation will be detailed. Ongoing preparatory documents for the safety during operation will be presented. The safety aspects and constraints specific to the operation of the HL-LHC IT String in the SM18 building will be highlighted. Last but not least, applied on-site...
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Vincent Thomas Barbarroux (CERN)
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Sandrine Le Naour (CERN)
The presentation gives a status of the cryo-magnets for the IT string and a brief sequence of the cryo-magnets installation and connection including the interlink (DCM). The results of critical steps of the magnet connection made on representative mock-up are detailed and the first intervention on the SQXL jumper for the magnet interface is also described. The specific tooling for the...
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Samer Yammine (CERN)
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Yann Leclercq (CERN)
The IT Cold Powering System is presented with its main components. The experience acquired during the assembly of the first Cold Powering System in 2023 is presented with respect to its added value for the upcoming STRING installation. After presentation of the proposed installation sequence, the workplan and the list of tasks until readiness for installation is shown.
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Dr Ezio Todesco (CERN)
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Michi Hostettler (CERN)
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Sebastien Blanchard (CERN)
The Warm Powering equipment, which includes the Power Converters (PC), Energy Extraction systems (EE), Circuit Disconnector Boxes (CDB), and Powering Interlock Controllers (PIC), is nearing the final stages of installation. This process also involves the setup of control cables, AC power supply, and the technical Ethernet network. The goal is to prepare for the Individual System Tests and...
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