Speaker
Description
The plasma haloscope is a promising variant of cavity haloscope for axion dark matter searches, employing an array of equidistant metallic wires. ALPHA is a global collaboration dedicated to the development and operation of such plasma haloscope experiments. The resonant frequency of these wire-array cavities is primarily determined by the inter-wire spacing, enabling access to higher mass ranges with minimal volume loss. Tuning the frequency typically requires mechanically complex systems to adjust all wire spacings simultaneously. In this work, we present a novel tuning mechanism inspired by spiral geometry, enabling frequency tuning through a single rotational motion. I will present electromagnetic simulations and experimental measurements demonstrating the effectiveness of the spiral-based design and discuss its potential for implementation in ALPHA.
