The Axion Dark Matter Experiment (ADMX) Sidecar Cavity System

The Axion Dark Matter eXperiment (ADMX) seeks to discover dark matter by looking for the resonant conversion of primordial axions to microwave photons in a strong magnetic field. The ADMX “Sidecar” cavity system is designed to pave the way for future, higher mass, searches by acting as an R&D platform which operates in tandem with the main ADMX experiment. In its latest run Sidecar has demonstrated the successful use of a piezoelectric actuator for cavity tuning and is the first to report data measured while scanning both the TM010 and TM020 modes. We report on the exclusions in three widely spaced frequency ranges (4202–4249, 5086–5799, and 7173–7203 MHz). Finally we will discuss the latest run of the Sidecar experiment and it’s anticipated sensitivity.