Examining axion-like particles with superconducting radio-frequency cavity

TL;DR

This paper investigates the production and detection of axion-like particles using superconducting RF cavities, optimizing cavity design and mode choices to enhance sensitivity and establish experimental constraints.

Contribution

It provides a detailed analysis of axion production via electromagnetic modes in SRF cavities, including numerical estimates and parameter space constraints.

Findings

Optimal cavity modes for axion production identified

Numerical estimates of axion energy density provided

Constraints on axion-photon coupling derived

Abstract

We address production of massive axion-like particles by two electromagnetic modes inside a superconducting radio-frequency (SRF) cylindrical cavity. We discuss in detail the choice of pump modes and cavity design. We numerically compute time-averaged energy density of produced axion field for various cavity modes and wide range of axion masses. This allows us to estimate optimal conditions for axion production within a cavity. In addition, we consider photon regeneration process initiated by produced axion field in a screened radio-frequency cavity and derive constraints in parameter space $(g_{a\gamma\gamma},\ m_a)$ for different choice of pump modes.