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Description
With the discovery of the Higgs boson the worldwide physics community is entering in a new era.
Among the most powerful tools to investigate and explore the high-energy frontiers there are
leptons and hadrons colliders that go beyond LHC reach. The High Luminosity upgrade of LHC
(Hi-Lumi LHC) and the Compact LInear Collider (CLIC) projects are briefly described in this seminar,
focusing on some of the major challenges in their design phase. In particular the interaction region
beam dynamics challenges for the two colliders will be discussed.
In the framework of the Hi-Lumi LHC Upgrade project a new possible variant for the layout of the
LHC matching section located in the high luminosity insertions is proposed. This layout is optimized
to reduce the demand on the voltage of the crab cavities, while substantially improving the optics
squeeze-ability, both in Achromatic Telescopic Squeezing (ATS) and non-ATS mode.
Concerning the CLIC project the emittance preservation in the Beam Delivery System (BDS) is one of
the major challenges. The fast detuning of the final focus optics require an on-line tuning procedure
in order to keep luminosity close to the maximum. The status of the study of BDS performance against
static imperfections is presented and the possibility to use Beam-Beam background signals as fast
luminosity measurement is investigated. A study of the impact of the main detectors solenoids on the
CLIC beams and luminosity is presented as well. Optical compensation of beam distortions and
incoherent synchrotron radiation in the interaction region magnets are evaluated.
