CERN celebrates the completion of civil engineering work for the High Luminosity LHC (HL-LHC), the major upgrade of its flagship collider, the LHC
Today, CERN is celebrating the completion of civil engineering work for the High-Luminosity Large Hadron Collider (HL-LHC), the major upgrade of its flagship collider, the LHC.
Approved in June 2016 and due to start operating in 2029, the HL-LHC will greatly improve the performance of the LHC by increasing the number of particle collisions and thus increasing the potential for discoveries. The completion of the civil engineering works marks the beginning of the transition to the HL-LHC era; the new collider components will be installed in the caverns and galleries that are now ready.
The HL-LHC is CERN’s main scientific goal of the decade, recognized as one of the highest priorities for the field in the 2020 update of the European Strategy for Particle Physics. This major upgrade builds on the LHC’s success since it began operating in 2010. While the LHC is capable of producing up to 1 billion proton-proton collisions per second, the HL-LHC will increase this number, known as the ” brightness”. by a factor of between five and seven, allowing for the accumulation of about ten times more data between 2029 and 2041, when it will be operational.
To achieve this increase in brightness, several innovative and challenging key technologies are being developed. These include new quadrupole superconducting magnets (based on niobium-tin instead of niobium-titanium) that will better focus the beam and compact crab cavities to tilt the beams at the collision points thus maximizing proton overlap. Other innovations include high-temperature superconducting links, new technologies for beam vacuum (extending magnet life) and beam collimation (protection against extinction), and high-precision power converters.
Most of these HL-LHC components will be integrated at Point 1 (Meyrin, Switzerland) and Point 5 (Cessy, France) of the LHC ring, where the ATLAS and CMS high-luminosity detectors are located.
“Civil engineering work started in June 2018 and, despite the difficult global context, was successfully completed at the end of 2022. Technological developments are well advanced, so we are truly at the beginning of the transition to the HL-LHC era. , one that will push the boundaries of technology and knowledge even further. It will allow physicists to study known mechanisms in detail, such as the Higgs boson, and to observe rare new phenomena that may be revealed,” says Oliver Brüning, HL-LHC project leader.
HL-LHC is an international effort involving 43 institutions in 19 countries, including CERN member and associate states, as well as the United States, Canada, Japan and China.
HL-LHC civil engineering
HL-LHC image gallery
HL-LHC Video Collection
View of the HL-LHC at LHC Point 1
Pictures from the celebration