Review of ADMX-SLIC Preliminary Run

As the search for low-mass axions extends to lower frequency regimes, traditional haloscope designs face geometric limitations as the Compton wavelengths of the photons produced from axions become comparable to the diameter of typical cavity resonators, which are constrained by the bore size of external superconducting magnets. To overcome this, the ADMX-SLIC experiment utilizes a tunable superconducting LC circuit functioning as a high-sensitivity, low-frequency RF axion antenna. This talk will present an overview of the experimental apparatus and summarize results from recent preliminary cold ($\sim4$ K) RF runs conducted without an external magnetic field. It is demonstrated that upgrades to the tuning system have expanded the accessible search range to $0.182 - 0.198$ $\mu$eV/$c^{2}$, representing a more than $4\times$ increase over previous runs. Across this range, the resonator maintains a nearly constant quality factor of $Q\sim10, 000$ and an estimated system noise temperature of approximately 19.2 K. This presentation will end with a discussion of the future for the ADMX-SLIC experiment as well as possible improvements and changes to the experiment currently being considered and tested.