Abstract:
A high intensity electron accelerator for irradiating large surface areas is provided with a plurality of cathodes having control grids to achieve a uniform current distribution on the irradiated surface.
Abstract:
A vacuum tube for producing a wide high-uniformity beam of fast accelerated electrons. The tube comprises an evacuated enclosure provided with an electron transparent window and containing an elongated cathode, accelerator electrodes and a control electrode formed by sleeves electrically insulated from one another and brought to separately adjustable potentials.
Abstract:
A method for controlling the cross-sectional area and intensity of an electron beam produced in an electron accelerator. A first constant electric field is applied to the beam causing dispersal of the beam in a first plane and concentration of the beam in a second plane disposed perpendicular to the first plane. Subsequently, a second constant electric field is applied to the beam causing beam concentration in the first plane and beam dispersal in the second plane. The fields are applied to the beam between the origin of the beam and the accelerator window and provide that the cross-sectional area of the beam greatly is enlarged at the point of intersection of the beam and the window relative to its original dimensions.