The Princeton Axion Search: Cryogenic Comissioning and Design of the Data Acquisition System

The Princeton aXion Search (PXS) is a new experiment to search for QCD axion dark matter in the 0.8-2.1 ueV mass range. In this talk, I will present an overview of the experiment, as well as updates to the cryostat commissioning. The PXS resonating cavity will be immersed in a 5T, 800mm bore NbTi magnet, which is currently under construction and expected to be completed in the fall of 2026. I will outline the magnet design, and present results from in-lab testing of a smaller Nb3Sn test coil. Finally, I will present preliminary results on the PXS data acquisition and analysis suite, which is based on a radio-frequency system on chip (RFSoC) board. The RFSoC's 5 GSPS ADC enables direct digitization in the PXS frequency band, and the on-board FPGA allows for fast parallel processing of the large data rates resulting from the sampling frequency.