Status and Challenges for FCC-ee

TL;DR

This paper reviews the design status and beam dynamics challenges of the FCC-ee, a proposed electron-positron collider, covering technical aspects, configurations, and future outlook as of 2015.

Contribution

It provides a comprehensive overview of the FCC-ee design status, highlighting key challenges and considerations in beam dynamics and collider configuration.

Findings

Identified key beam dynamics challenges for FCC-ee.

Discussed potential staging and configuration options.

Highlighted the importance of SuperKEKB as a demonstrator.

Abstract

We report the design status and beam dynamics challenges for the electron-positron branch of the Future Circular Collider (FCC) study, as of August 2015. After recalling motivation and physics requirements for the FCC-ee, we briefly discuss configurations and parameters, collider layout, the superconducting RF system, possible staging scenarios, final-focus optics, interaction-region (IR) issues, machine detector interface and IR synchrotron radiation, dynamic aperture, beam-beam effects, top-up injection, mono-chromatization option, impedances, instabilities, energy calibration and polarization, and SuperKEKB as a key demonstrator, before presenting conclusions and outlook.