Design and Initial results of the Hypersonic Plasma Interaction Research (HyPIR) Facility

The Experimental Plasma Lab at Riverside Research, a 501(c)(3) nonprofit institution, has developed advanced capabilities to investigate a range of plasma phenomena, including plasma–electromagnetic interactions, electric propulsion for small satellites, dielectric properties of high-temperature RF/IR windows, and plasma–material interactions in extreme environments. Recent efforts have focused on establishing the Hypersonic Plasma Interaction Research (HyPIR) facility—an integrated testbed designed to study the effects of oxidizing plasmas on materials relevant to hypersonic flight. The testbed provides flexible access for optical diagnostics, sample mounting, and heating. Planned diagnostics include Laser-Induced Fluorescence, Thomson Scattering, Optical Emission Spectroscopy, Laser-Induced Breakdown Spectroscopy, and microwave and IR interferometry. These tools enable spatially and temporally resolved measurements of plasma behavior, material response, and dielectric properties. Samples are heated using a retractable graphite heater, laser heating, and direct plasma exposure. The HyPIR facility provides a controlled, diagnosable platform for recreating hypersonic, fusion, and industrial plasma conditions, with plans to support external users.