Tag: LS3
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LHC operational status
Figure 1: Photograph of the dispersion suppressor collimator (TCLD) installed in the dispersion suppressor region around ALICE. A standard 15m-long connection cryostat is replaced by two shorter connection cryostats and a bypass module that enables installation of a warm collimator. Since the restart of the LHC for its third operational run in 2022 (Run 3),…
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Planning of annual meeting and CSR’22, including summary of CSR’21 outcome
Following a very successful exercise in 2021, CERNs Council has requested the Cost & schedule reviews of the HL-LHC project to be held annually, a lighter edition alternating every second year with a full project review. The 2022 – a light – edition has been scheduled for the 14th – 15th November. The CSR’21, first…
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HL-LHC procurement and current market situation
The High-Luminosity Project is finalising the transition from the prototyping phase into full construction mode and most of the activities in view of the series production for the HL-LHC hardware have already started across all work-packages. Procurement is closely following the baseline schedule of the project and is running in parallel to the project milestones.…
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Status of civil engineering works and technical infrastructures
The civil engineering works is progressing well (the detailed progress status is shown in Figure 1). The underground works, including the metallic structures, have been fully completed at Point 1 in October 2021 and Point 5 in February 2022, with only one to two months of delay with respect to the contractual dates mainly due…
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The IT String making big leaps towards its operation
The HL-LHC IT String is a major, intermediate milestone for the HL-LHC project ahead of the installation of the first cold powering systems in the LHC tunnel during LS3. The IT String will enable testing of the collective behavior of many new key hardware systems designed for the new era of the High Luminosity LHC.…
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First beam commissioning of the new HL-LHC collimators at the LHC
The HL-LHC WP5 activities started in LS2 with some important upgrades in preparation to the full deployment of HL-LHC in LS3. The first phase of the collimation system upgrade during LS2 involved the installation of: The updated LHC collimation system layout for the recently started Run 3 is shown in Figure 1. Primary collimators and…
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Overview of collaboration status and situation with Russian in-kind
The HL-LHC Project is entering the series construction phase and therefore most of the collaboration agreements are now focused on the production of final elements that will have their destination in the LHC tunnel and in the set of operational spares. The in-kind contributions account for about 10% of the total project cost, but at…
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Update on Collaboration agreements and report from the Collaboration Board at the last Annual Meeting
The still unresolved COVID-19 pandemic, which defined the year 2020, has unsurprisingly had an impact on our collaborations. However, the impact appears to be contained to a few months, with delays that can be reabsorbed and are also partially mitigated by the decision taken after the 2019 C&SR to delay the start of LS3 by…
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Performance ramp-up in the HL-LHC era
The performance ramp-up of the LHC after LS3 foresees a smooth ramp-up of the effective pile-up density for the nominal case, with a nominal bunch intensity reached after two years (i.e. as of 2029: 1.7 × 1011 in 2027 and 2028 is a placeholder for the bunch intensity reached in Run3 in LHC, whose target…
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Report from the TCC
The HL-LHC Technical Coordination Committee has continued its work for the follow-up and evolution of the technical baseline of the project in a fully remote format. While the current restrictions still prohibit in-person meetings, the remote format has been allowed more active participation from all collaborators, which is an important asset for the current project…