Longitudinally resolved measurement of energy-transfer efficiency in a plasma-wakefield accelerator
Abstract
Energy-transfer efficiency is an important quantity in plasma-wakefield acceleration, especially for applications that demand high average power. Conventionally, the efficiency is measured using an electron spectrometer; an invasive method that provides an energy-transfer efficiency averaged over the full length of the plasma accelerator. Here, we experimentally demonstrate a novel diagnostic utilizing the excess light emitted by the plasma after a beam-plasma interaction, which yields noninvasive, longitudinally resolved measurements of the local energy-transfer efficiency from the wake to the accelerated bunch; here, as high as (58 3)%. This method is suitable for online optimization of individual stages in a future multistage plasma accelerator, and enables experimental studies of the relation between efficiency and transverse instability in the acceleration process.
Keywords
Cite
@article{arxiv.2209.06690,
title = {Longitudinally resolved measurement of energy-transfer efficiency in a plasma-wakefield accelerator},
author = {L. Boulton and C. A. Lindstrøm and J. Beinortaite and J. Björklund Svensson and J. M. Garland and P. González Caminal and B. Hidding and G. Loisch and F. Peña and K. Põder and S. Schröder and S. Wesch and J. C. Wood and J. Osterhoff and R. D'Arcy},
journal= {arXiv preprint arXiv:2209.06690},
year = {2022}
}
Comments
6 pages, 4 figures