Tunable Axion Plasma Haloscopes.

Matthew Lawson,Alexander J Millar,Edoardo Vitagliano,Frank Wilczek,Matteo Pancaldi

doi:10.1103/physrevlett.123.141802

Abstract

We propose a new strategy for searching for dark matter axions using tunable cryogenic plasmas. Unlike current experiments, which repair the mismatch between axion and photon masses by breaking translational invariance (cavity and dielectric haloscopes), a plasma haloscope enables resonant conversion by matching the axion mass to a plasma frequency. A key advantage is that the plasma frequency is unrelated to the physical size of the device, allowing large conversion volumes. We identify wire metamaterials as a promising candidate plasma, wherein the plasma frequency can be tuned by varying the interwire spacing. For realistic experimental sizes, we estimate competitive sensitivity for axion masses of 35-400 μeV, at least.

Highlights

The MIT Faculty has made this article openly available
We propose a new strategy for searching for dark matter axions using tunable cryogenic plasmas
Unlike current experiments, which repair the mismatch between axion and photon masses by breaking translational invariance, a plasma haloscope enables resonant conversion by matching the axion mass to a plasma frequency

Summary

Introduction

The MIT Faculty has made this article openly available. Please share how this access benefits you. We propose a new strategy for searching for dark matter axions using tunable cryogenic plasmas. A key advantage is that the plasma frequency is unrelated to the physical size of the device, allowing large conversion volumes.

Results

Conclusion