Low-frequency AC conductivity measurement in magnetized ultracold neutral plasmas

Ultracold neutral plasmas (UNP) provide a table-top-scale experimental tool for investigating plasma phenomena. We have designed a technique using UNPs to measure electron conductivity in a plasma in response to an applied high-frequency RF field. We are extending this technique to low-frequency fields. This will allow us to explore conductivity effects in a new regime where the plasma physics can be more easily described theoretically without some complications present in the high-frequency case. In addition, the RF frequencies are low enough that comparisons to DC conductivity predictions can be made.