The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
@inproceedings{passarelli:ipac2021-mopab346,
author = {A. Passarelli and A. Andreone and M. De Stefano and C. Koral and M.R. Masullo and V.G. Vaccaro},
title = {{Broadband Frequency Electromagnetic Characterisation of Coating Materials}},
booktitle = {Proc. IPAC'21},
pages = {1076--1079},
eid = {MOPAB346},
language = {english},
keywords = {GUI, experiment, electron, vacuum, site},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-MOPAB346},
url = {https://jacow.org/ipac2021/papers/mopab346.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-MOPAB346},
abstract = {{In the new generation of particle accelerators and storage rings, collective effects have to be carefully analyzed. In particular, the finite conductivity of the beam pipe walls is a major source of impedance and instabilities. A reliable electromagnetic (EM) characterisation of different coating materials is required up to hundreds of GHz due to very short bunches. We propose two different measurement techniques for an extended frequency characterization: (i) a THz time domain setup based on the signal transmission response of a tailored waveguide to infer the coating EM properties from 100 to 300 GHz or even further*.**. This technique has been tested both on NEG and amorphous Carbon films. (ii) a resonant method, based on dielectric cavities, to evaluate the surface resistance Rs of thin conducting samples at low (GHz) frequencies***. Due to its high sensitivity, Rs values can be obtained for very thin (nanometric) coatings or for copper samples with a laser treated surface, since they have an expected conductivity very close to bulk copper.}},
}