Sagdeev

Sagdeev is a Russian-language surname. The most prominent bearer is Roald Sagdeev, a Soviet and American plasma physicist whose work helped shape modern space and laboratory plasma research. Sagdeev is best known for the Sagdeev potential, a theoretical construct used to analyze nonlinear electrostatic waves in collisionless plasmas. This framework allows researchers to treat stationary nonlinear structures, such as ion-acoustic solitons and double layers, in an energy-like formulation by reducing the governing equations to a single integral form. Sagdeev’s contributions span theoretical development, computational methods, and leadership in research institutions, reflecting a significant impact on plasma physics and space science. The surname may also refer to other individuals with Russian origins.