Metamaterial insertions for resistive-wall beam-coupling impedance reduction
Accelerator Physics
2019-10-08 v1
Abstract
Resistive-wall impedance usually constitutes a significant percentage of the total beamcoupling impedance budget of an accelerator. Reduction techniques often entail high electrical-conductivity coatings. This paper investigates the use of negative-permittivity or negative-permeability materials for sensibly reducing or theoretically nearly cancelling resistive-wall impedance. The proposed approach is developed by means of an equivalent transmission-line model. The effectiveness of such materials is benchmarked for the negative permeability case with experimental measurements in two frequency bandwidths. This first-stage study opens the possibility of considering metamaterials for impedance mitigation.
Cite
@article{arxiv.1910.02246,
title = {Metamaterial insertions for resistive-wall beam-coupling impedance reduction},
author = {Alessandro Danisi and Carlo Zannini and Roberto Losito and Alessandro Masi},
journal= {arXiv preprint arXiv:1910.02246},
year = {2019}
}