New Results in Impedance Probe Applications and Antenna Coupling in the NRL Space Physics Simulation Chamber*

We will present recent progress in plasma impedance probe experiments and antenna coupling calculations at NRL's Space Physics Simulation Chamber. The experiments are performed under a variety of conditions with magnetized and unmagnetized collisionless, cold plasmas in density ranges of $10^5-10^{10} cm^{-3}$. A range of low frequency measurements less than the ion plasma frequency will be compared with revised impedance probe models. Additionally, we will present new computational results on antenna coupling in a magnetized plasma.