Axion

Physics

Dark matter

Solenoid

Fermilab

Light source

Mechanics

Vector field

Terahertz radiation

Particle physics

Optics

Engineering

Photon

Sensitivity (control systems)

Electronic engineering

Reflector (photography)

Superconductivity

Quantum mechanics

Broadband

Solenoidal vector field

Cryostat

Physical Review Letters

We introduce the Broadband Reflector Experiment for Axion Detection (BREAD) conceptual design and science program. This haloscope plans to search for bosonic dark matter across the [10^{-3},1] eV ([0.24, 240] THz) mass range. BREAD proposes a cylindrical metal barrel to convert dark matter into photons, which a novel parabolic reflector design focuses onto a photosensor. This unique geometry enables enclosure in standard cryostats and high-field solenoids, overcoming limitations of current dish antennas. A pilot 0.7 m^{2} barrel experiment planned at Fermilab is projected to surpass existing dark photon coupling constraints by over a decade with one-day runtime. Axion sensitivity requires <10^{-20} W/sqrt[Hz] sensor noise equivalent power with a 10 T solenoid and 10 m^{2} barrel. We project BREAD sensitivity for various sensor technologies and discuss future prospects.

Broadband Solenoidal Haloscope for Terahertz Axion Detection