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  • Open Access

Transverse beam jitter damping along the Future Circular Collider e+e− injector linacs

S. Bettoni*

A. Latina† and A. Grudiev

  • CERN, Meyrin, Switzerland

  • *Contact author: simona.bettoni@psi.ch
  • †Contact author: andrea.latina@cern.ch
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Phys. Rev. Accel. Beams 28, 061601 – Published 30 June, 2025

DOI: https://doi.org/10.1103/8wx6-9spr

Abstract

Transverse stabilization of the beam is crucial for optimizing the performance of a particle accelerator, regardless of its application. The most common method for minimizing transverse beam jitter is the Balakin-Novokhatsky-Smirnov (BNS) damping technique. Although this method has been successfully implemented worldwide, it has limitations since a significant fraction of the accelerating structures are operated off crest. In this work, we propose an alternative approach to induce the required energy spread, utilizing the natural curvature of the accelerating rf field in combination with a relatively long bunch and a longitudinal wakefield. This approach achieves strong damping of the transverse beam oscillations, similar to BNS damping, while simultaneously optimizing beam quality and maximizing acceleration efficiency. We have applied this method to the design of the Future Circular Collider injector linacs, designed to reach a beam energy of up to 20 GeV. However, this method is general and can be applied in principle to any accelerator.

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Phys. Rev. Accel. Beams 28, 061601– Published 30 June, 2025
  • Received 15 January 2025
  • Accepted 28 May 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

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