Speaker
Description
We present an update of the optics cycles foreseen during physics operation in the High-Luminosity LHC (HL-LHC) era.
New optics around the upgraded ATLAS and CMS experiments are needed due to the new quadrupole layout and lower $\beta^*$. In addition, thanks to numerous studies and lessons learnt during Run 3, the entire machine's optics will be modified to improve key aspects such as machine protection, beam-lifetime optimisation, and $\beta^*$ minimisation. This is achieved by integrating the optimisation of octupole-induced resonances, phase advances between collimators and crab cavities, new collimation optics, control of dispersion, and flat-optics options.
The contribution will present a proposal for the $\beta^*$
commissioning steps during Run 4 and Run 5 with the aim of maximising integrated luminosity. These new cycles will also be used in the Inner Triplet (IT) string operational validation programme in future collimation studies.
Funding Agency
Research supported by the HL-LHC project
| Paper status | Resubmitted proceeding files received and assigned to an editor. Accepted by Submitter. |
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