CRAB Cavity in CERN SPS

TL;DR

This paper investigates the use of crab cavities in CERN SPS to compensate for crossing angles in high-intensity colliders, aiming to improve luminosity and beam stability, as a step towards full implementation in the LHC.

Contribution

It provides an analysis of crab crossing effects on beam dynamics and lifetime in SPS, supporting the potential adoption in LHC.

Findings

Crab cavities can effectively compensate crossing angles.

Crab crossing improves beam lifetime and luminosity.

The study supports full crab-cavity implementation in LHC.

Abstract

Beam collisions with a crossing angle at the interaction point have been applied in high intensity colliders to reduce the effects of parasitic collisions which induce emittance growth and beam lifetime deterioration. The crossing angle causes the geometrical reduction of the luminosity. Crab cavity can be one of the most promising ways to compensate the crossing angle and to realize effective head-on collisions. Moreover, the crab crossing mitigates the synchro-betatron resonances due to the crossing angle. Crab cavity experiment in SPS is proposed for deciding on a full crab-cavity implementation in LHC. In this paper, we investigate the effects of crab crossing on beam dynamics and its life time with the global scheme.