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Why is a fully ionized hydrogen plasma made of electrons and protons?
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Learn about the PHELIX (Petawatt High-Energy Laser for Heavy Ion Experiments) laser at the GSI Helmholtz Centre for Heavy Ion Research in Darmstadt, Germany. PHELIX is used for plasma and atomic physics research.
A fully ionized hydrogen plasma consists of electrons and protons because of the atomic structure of hydrogen and the process of ionization.
An ordinary hydrogen atom is composed of a single proton as its nucleus and one electron orbiting it. When this gas is subjected to extreme heat or intense radiation, the energy provided is sufficient to overcome the binding force holding the electron to the nucleus.123
Through this process, the electron is stripped away, leaving behind the bare hydrogen nucleus—a proton—and a free electron. Because the hydrogen atom contains only these two components, a fully ionized state results in a plasma comprised exclusively of these two particles. This is considered the most elementary form of plasma.24