# EPS-HEP2019

Jul 10 – 17, 2019
Ghent
Europe/Brussels timezone

## Optics Corrections and Emittance Tuning for FCC-ee

Jul 13, 2019, 10:10 AM
20m
Campus Ledeganck - Aud. 6 (Ghent)

### Campus Ledeganck - Aud. 6

#### Ghent

Parallel talk Accelerators for HEP

### Speakers

Dr Tessa Charles Tessa Charles (University of Melbourne (AU))

### Description

The FCC­-ee project studies the design of a future 100 km e+/e­ circular collider for precision studies and rare decay observations in the range of 90 to 350 GeV center of mass energy with luminosities in the order of 10$^{35}$ cm$^{-2}$ s$^{-1}$. In order to reach this high luminosity, extreme focusing is required in the interaction regions, with the beta function values range from 0.8 mm to 7736 m (for the Z lattice). This makes FCC-ee particularly susceptible to misalignments and field errors, and therefore presents an appreciable challenge for emittance tuning. We describe a comprehensive correction strategy used for the low emittance tuning. The strategy includes programs that have been developed to optimise the lattice based on Dispersion Free Steering, linear coupling compensation based on Resonant Driving Terms and beta beat correction utilising response matrices. Hundreds of lattices with different random seeds for the misalignment and field errors were introduced in MAD-X and the final corrected lattices are presented.

### Co-authors

Frank Zimmermann (CERN) Dr Katsunobu Oide (High Energy Accelerator Research Organization (JP)) Bernhard Holzer (CERN)

### Presentation materials

 ESP_HEP_2019_Charles.pdf ESP_HEP_2019_Charles.pptx