PK-4 (ISS experiment)

PK-4 refers to a specific experiment conducted on the International Space Station (ISS), focusing on the study of plasmas and their behaviors in microgravity. PK-4 is an acronym for "Plasma Kinetics 4," and it aims to investigate complex plasmas, which are ionized gases containing a significant number of charged particles and neutral gas atoms. The experiment involves creating a controlled environment to observe how these complex plasmas behave under various conditions.