Abstract
One option for a future circular collider at CERN is to build a 13.5 TeV hadron synchrotron, or High Energy LHC (HE-LHC) in the LHC tunnel. Injection and dump systems will have to be upgraded to cope with the higher beam rigidity and increased damage potential of the beam. The required modifications of the beam transfer hardware are highlighted in view of technology advancements in the field of kicker switch technology. An optimised straight section optics is shown.
Highlights
For High Energy LHC (HE-LHC) two injection energy options are considered, 450 GeV and 1.3 TeV
The injection region optics would require rematching if the HE-LHC side experiments differ in size and optics from the present ones
The dump systems for Beam 1 and Beam 2 are located symmetrically around P6 of the LHC and use the full straight section, with a special optics to provide the long drift distance needed between kicker and septum, and from the septum to the machine quadrupole, to allow the beam to be extracted past the cryostat
Summary
For HE-LHC two injection energy options are considered, 450 GeV and 1.3 TeV. The flattop energy is 13.5 TeV. Due to the damage limit of transfer line collimators and the injection dump, only batches of 100-150 bunches can be injected at once (energy deposition similar to HL-LHC), which requires shorter rise times than present to reach the same fill factor [2]. The dump systems for Beam 1 and Beam 2 are located symmetrically around P6 of the LHC and use the full straight section, with a special optics to provide the long drift distance needed between kicker and septum, and from the septum to the machine quadrupole, to allow the beam to be extracted past the cryostat.
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