The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF
AU - Rossi, L.
AU - Brüning, O.S.
ED - Boland, Mark
ED - Tanaka, Hitoshi
ED - Button, David
ED - Dowd, Rohan
ED - Schaa, Volker RW
ED - Tan, Eugene
TI - Progress with the High Luminosity LHC Project at CERN
J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY - Melbourne, Australia
T2 - International Particle Accelerator Conference
T3 - 10
LA - english
AB - The High Luminosity LHC (HL-LHC) project aims at upgrading the LHC by increasing the peak luminosity by a factor five, to allow to collect 3000 fb-1 for ATLAS and CMS experiments, each, which is ten times more than what is foreseen in the LHC. The upgrade is based on multiple factors. One factor is doubling the beam current, also thanks to the injector upgrade (LIU) project, and another one is operation in levelling mode. The most critical upgrade is the deploying of a stronger inner quadrupole triplet in the low-beta insertions with more than twice-larger aperture w.r.t. present LHC triplet, thanks to the use of Nb₃Sn superconductor, a world first for accelerators, with almost 12 T peak field in the coils. The novel concept of ATS optics allows to utilise the increased aperture efficiently by generating β^{*} values 3 to 4 times below the nominal values of the LHC. We will make use of compact crab cavities for hadrons (also a novelty in accelerators) to allow almost head-on collisions despite the larger crossing angle. We are developing new collimator insertions in the dispersion suppressor region to handle the losses in the cold part of the machine (the beam halo stores 30 MJ) thanks to the use of a few 11 T dipoles based on Nb₃Sn technology. We also aim at reducing drastically the impedance contribution of collimators by utilizing new materials and coating techniques. Many other technologies are developed for HL-LHC like new SC links of 100 kA: HL-LHC is critical as a technology turning point for HEP colliders as it is for Physics reach. The technologies developed for HL-LHC, namely (but not only) the high field superconducting magnets, are critical for the post-LHC hadron collider, like a High Energy LHC or the 100 km Future Circular Collider
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 17
EP - 22
KW - luminosity
KW - cavity
KW - operation
KW - quadrupole
KW - collider
DA - 2019/06
PY - 2019
SN - 978-3-95450-208-0
DO - DOI: 10.18429/JACoW-IPAC2019-MOYPLM3
UR - http://jacow.org/ipac2019/papers/moyplm3.pdf
ER -