# Determination of the magnetic field dependence of the surface resistance of superconductors from cavity tests

## TL;DR

This paper introduces a method to determine how the surface resistance of superconductors varies with magnetic field, using cavity test data, applicable to various cavity geometries.

## Contribution

A general approach is developed to extract magnetic field dependence of surface resistance from cryogenic cavity test Q-curves, applicable to multiple cavity types.

## Key findings

- Method successfully applied to coaxial and elliptical cavities
- Enables analysis of complex cavity geometries
- Provides insights into superconductor performance under magnetic fields

## Abstract

We present a general method to derive the magnetic field dependence of the surface resistance of superconductors from the Q-curves obtained during the cryogenic tests of cavities. The results are applied to coaxial half-wave cavities, TM-like "elliptical" accelerating cavities, and cavities of more complicated geometries.

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Source: https://tomesphere.com/paper/1812.06030