T-RAX: Transversely Resonant Axion eXperiment

TL;DR

The paper introduces T-RAX, a novel axion detection method using a rectangular waveguide near cutoff, offering high sensitivity to QCD-axions in the 40-400 μeV mass range through a design that enhances signal power and suppresses parasitic modes.

Contribution

It presents a new waveguide-based detector design for axion searches, combining theoretical principles, simulations, and implementation strategies for improved sensitivity.

Findings

Design achieves high signal power due to large surface area.

Suppression of parasitic modes enhances detection clarity.

Sensitive to QCD-axions in the 40-400 μeV mass range.

Abstract

We propose to use an elongated rectangular waveguide near its cutoff frequency for axionic dark matter searches. The detector's large surface area allows for significant signal power, while its narrow transverse dimension and tapered-waveguide coupling suppress parasitic modes. The proposed system can fit inside a solenoid magnet and is sensitive to the QCD-axion in the axion mass $40-400\,\mu$eV. We describe the theoretical principles of the new design, present simulation results, and discuss the implementation.