부산대학교 도서관

Summary form only given. Continued experimentation on the Inertial Electrostatic Confinement (IEC) of ions in a virtual cathode potential well at Los Alamos National Laboratory (LANL) is presented. The IEC virtual cathode is formed by focusing six diametrically opposed electron beams to the center of a spherical vacuum chamber. The electrons are accelerated using two highly transparent, concentric spherical grids held at positive potential. The converging electron beams generate a parabolic potential well inside of the innermost grid, which is measured using a tungsten filament emissive probe. Ions created inside of the virtual cathode will remain trapped, with the maximum ion energy determined by the well depth.