Simulations of Coaxial Wire Measurements of the Impedance of Asymmetric Structures

TL;DR

This paper proposes a new method for measuring the beam coupling impedance of asymmetric accelerator structures using coaxial wire measurements, including displaced single wires and two-wire techniques, supported by simulation results.

Contribution

It introduces a novel measurement approach for asymmetric structures, expanding beyond existing symmetric structure methods, with simulation validation.

Findings

Successful simulation of the proposed measurement system

Extension of impedance measurement techniques to asymmetric structures

Foundation for future experimental validation

Abstract

Coaxial wire measurements have provided a simple and effective way to measure the beam coupling impedance of accelerator structures for a number of years. It has been known how to measure the longitudinal and dipolar transverse impedance using one and two wires for some time. Recently the ability to measure the quadrupolar impedance of structures exhibiting top/bottom and left/right symmetry has been demonstrated. A method for measuring the beam coupling impedance of asymmetric structures using displaced single wires and two wire measurements is proposed. Simulations of the measurement system are presented with further work proposed.