Beam Loading Compensation in the Main Linac of CLIC

TL;DR

This paper discusses a scheme to compensate for multi-bunch beam loading in CLIC's main linac by varying drive beam bunch train lengths, aiming to keep energy variation below 0.1%.

Contribution

It introduces a novel method of beam loading compensation using variable bunch train lengths in the drive beam for CLIC.

Findings

The proposed scheme can effectively reduce energy variation to below 0.1%.

Simulation results show promising performance of the method.

The approach offers a new way to manage beam loading in linear colliders.

Abstract

Compensation of multi-bunch beam loading is of great importance in the main linac of the Compact Linear Collider (CLIC). The bunch-to-bunch energy variation has to stay below 1 part in 1000. In CLIC, the RF power is obtained by decelerating a drive beam which is formed by merging a number of short bunch trains. A promising scheme for tackling beam loading in the main linac is based on varying the lengths of the bunch trains in the drive beam. The scheme and its expected performance are presented.