Category: News Page
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11T: Decision to install the collimator package in MB9 and update on the latest prototype test results and test plans
Since Issue 2 of the Newsletter, it was decided to change the installation position of the dispersion suppressor collimators (TCLD) of IR7 from cell 8 to cell 9 in order to provide a much better cleaning in cell 11 for both protons and ions operation. Although this implies a higher power density deposited in the…
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New Crab Cavity positions and cryogenic shuffling module design
In the Optics 1.5 the crab position in the layout has been reviewed in order to take into account the design constraints of the cryogenic distribution line (QXL). In addition, the new approach guarantees the accessibility of the QXL equipment (valves and instrumentation) and provides an identical cryogenic layout able to receive both RFD and…
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Status of magnet test results
The last short model of the Nb3Sn quadrupole was limited below nominal current by one coil: to overcome this issue, the limiting coil shall be replaced magnet and the magnet shall be tested in summer. The results of the test on US prototype has been reported here. The first prototype of the nested corrector MCBXFB…
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Report on the CD2 DOE Review
The US HL-LHC AUP effort successfully defended its plans to DOE in December 2018, and was baselined in February 2019. This major step, called Critical Decision -2 approval (CD-2), provides the funding agency approval of the total estimated Project cost and yearly funding profile to meet the goal of the US contribution to HL-LHC. Two…
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Highlights from the HL-LHC Work Packages
WP2: Performance and Beam Dynamics During a measurement campaign in 2017 at the LHC, it was clearly demonstrated for the first time the beam lifetime improvement due to a compensation of the beam-beam long range effects, using DC current baring wires. The measurements and design studies are continuing during 2018 for further refining of the…
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Summary on the outcome of the 2018 Chamonix meeting
The 2018 Chamonix workshop featured three sessions for the HL-LHC project. The sessions at Chamonix provided the first chance for a technical and performance review of the project following the re-baselining in 2016. The CMAC validated all re-baselining decisions from 2016 and gave the project a good bill of health. Main observations from Chamonix 2018…
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Outcome of the 2018 Cost and Schedule review
The 3rd Cost & Schedule Review of the projects HL-LHC and LIU (LHC Injectors Upgrade) was held at CERN on 26th – 28th of March 2018. As usual, the panel is composed by the CMAC (CERN Machine Advisory Committee) members with the addition of a few other international experts as reviewers. The main outcome was…
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First Full Length Prototype of the 11T Dipole Magnet
The construction of the 5.5-m long 11T dipole prototype was completed in May this year after several years of intense work dedicated to the development and optimisation of the special tooling, and of the related manufacturing and inspection procedures. Most of the construction activities took place in the Large Magnet Facility in building 180 at…
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Groundbreaking for the Civil Engineering work at P1 and P5 of the LHC
Two contracts for the civil engineering works were adjudicated by the Finance Committee of March 2018 to a consortium MARTI TUNNELBAU, MARTI ÖSTERREICH and MARTI DEUTSCHLAND for the Point 1 works and to a consortium IMPLENIA SCHWEIZ, BARESEL and IMPLENIA CONSTRUCTION for the Point 5 works. At each point, the work consists of the construction…
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Crab Cavity Prototype Development and Test Stand Installation in the SPS and World’s First Crabbing of a Proton Beam
The first test of superconducting crab cavities to rotate a beam of protons was performed on 23 May 2018 using a beam from CERN’s Super Proton Synchrotron (SPS) accelerator. These cavities are a key component of the High Luminosity Large Hadron Collider (HL-LHC). A total of 16 such cavities will be installed in the HL-LHC…