BDS tuning and Luminosity Monitoring in CLIC

TL;DR

This paper explores the use of beam-beam background processes, specifically hadron multiplicity, as a fast luminosity monitoring method for the CLIC Beam Delivery System to improve emittance preservation and final focus tuning.

Contribution

It introduces a novel approach to luminosity monitoring in CLIC using beam-beam background signals, enabling real-time tuning of the final focus system.

Findings

Hadron multiplicity correlates with luminosity levels.

Beam-beam background processes can serve as fast luminosity signals.

Potential for improved on-line tuning of the BDS in CLIC.

Abstract

The emittance preservation in the Beam Delivery System (BDS) is one of the major challenges in CLIC. The fast detuning of the final focus optics requires an on-line tuning procedure in order to keep luminosity close to the maximum. Different tuning techniques have been applied to the CLIC BDS and in particular to the Final Focus System (FFS) in order to mitigate static and dynamic imperfections. Some of them require a fast luminosity measurement. Here we study the possibility to use beam-beam backgrounds processes at CLIC 3 TeV CM energy as fast luminosity signal. In particular the hadrons multiplicity in the detector region is investigated.