Future High Energy Circular e+e- Collider using Energy-Recovery Linacs

TL;DR

This paper proposes an energy-recovery linac approach for a future circular e+e- collider, significantly reducing power consumption and enabling higher collision energies for advanced particle physics research.

Contribution

It introduces a novel energy recovery linac design for circular colliders, addressing power efficiency and extending achievable collision energies beyond current designs.

Findings

Up to tenfold reduction in beam energy losses.

Potential to reach 500 GeV center-of-mass energy.

Maintains high luminosity with energy recovery approach.

Abstract

In this paper we present alternative approach for Future Circular electron-positron Collider. Current 100 km circumference design with the top CM energy of 365 GeV (182.5 GeV beam energy) is based on two storage rings to circulate colliding beams. One of the ring-ring design shortcomings is enormous power consumption needed to compensate for 100 MW of the beam energy losses for synchrotron radiation. We propose to use energy recovery linac located in the same tunnel to mitigate this drawback. We show in this paper that our approach would allow a significant, up to an order of magnitude, reduction of the beam energy losses while maintaining high luminosity in this collider at high energies. Furthermore, our approach would allow to extend CM energy to 500 GeV (or above), which is sufficient for double Higgs production.