The Basic Plasma Science Facility (BaPSF) is a US national collaborative research facility for fundamental plasma physics, supported by the US Department of Energy and the National Science Foundation.

The purpose of BaPSF is to provide the scientific community access to frontier-level research devices (principally the Large Plasma Device) that permit the exploration of plasma processes which can not be studied in smaller devices or are difficult to diagnose in larger facilities, such as magnetic confinement fusion experiments.  

The broad parameter ranges accessible in the plasma devices operated at BaPSF allow studies that span microscopic phenomena on the fast electron time scales (e.g., electron plasma waves, cyclotron radiation) to the slow time scales characteristic of plasma transport driven by drift‐wave turbulence and long wavelength magnetic fluctuations.