Resonant emittance mixing of flat beams in plasma accelerators
Accelerator Physics
2025-01-07 v2 Plasma Physics
Abstract
Linear colliders rely on high-quality flat beams to achieve the desired event rate, while avoiding potentially deleterious beamstrahlung effects. Here, we show that flat beams in plasma accelerators can be subject to quality degradation due to emittance mixing. This effect occurs when the beam particles' betatron oscillations in a nonlinearly coupled wakefield become resonant in the horizontal and vertical planes. Emittance mixing can lead to a substantial decrease of the luminosity, the main quantity determining the event rate. In some cases, the use of laser drivers or flat particle beam drivers may decrease the fraction of resonant particles and, hence, mitigate emittance deterioration.
Cite
@article{arxiv.2403.05871,
title = {Resonant emittance mixing of flat beams in plasma accelerators},
author = {Severin Diederichs and Carlo Benedetti and Angel Ferran Pousa and Alexander Sinn and Jens Osterhoff and Carl B. Schroeder and Maxence Thévenet},
journal= {arXiv preprint arXiv:2403.05871},
year = {2025}
}