DMRadio-50L: Calibration Techniques

DMRadio-50L is a resonant, lumped-element detector searching for low-mass axion dark matter. One of the most difficult, yet often overlooked problems is how to calibrate these experiments. In this talk, I will outline the calibration plan DMRadio-50L will employ to determine our end-to-end sensitivity to axion dark matter. A variety of methods will be used, including a mimetic axion signal injected into the detector, resonator noise measurements, multichannel SQUID chain calibration, and sideband injection. These results will allow us to characterize lumped element detectors and convert raw detector data into limits on axion to two photon coupling.