| Article | |
| Title | A Wireless Method to Obtain the Impedance From Scattering Parameters |
| Author(s) | Antuono, Chiara (CERN) ; Migliorati, Mauro (Frascati) ; Mostacci, Andrea (Frascati) ; Métral, Elias (CERN) ; Zannini, Carlo (CERN) |
| Publication | 2022 |
| Number of pages | 4 |
| In: | JACoW IPAC 2022 (2022) 2213-2216 |
| In: | 13th International Particle Accelerator Conference (IPAC 2022), Bangkok, Thailand, 12 - 17 Jun 2022, pp.2213-2216 |
| DOI | 10.18429/JACoW-IPAC2022-WEPOTK063 |
| Subject category | Accelerators and Storage Rings |
| Abstract | The coaxial wire method is a common and appreciated choice to assess the beam coupling impedance of an accelerator element from scattering parameters. Nevertheless, the results obtained from wire measurements could be inaccurate due to the presence of the stretched conductive wire that artificially creates the conditions for the propagation of a Transverse ElectroMagnetic (TEM) mode. The aim of this work is to establish a solid technique to obtain the beam coupling impedance from electromagnetic simulations, without modifications of the device under test. In this framework, we identified a new relation to get the resistive wall beam coupling impedance of a circular chamber directly from the scattering parameters and demonstrated that it reduces to the exact theoretical expression. Furthermore, a possible generalization of the method to arbitrary cross section geometries has been studied and validated with numerical simulations. |
| Copyright/License | CC-BY-3.0 |
Corresponding record in: Inspire
Registre creat el 2023-01-11, darrera modificació el 2023-01-11
