Patent ID: 7653178
Filing Date: 2010-01-26
Classification: G21K,H01J

Abstract:
1. A method for generating an X-ray, comprising the steps of: flattening an electron beam with a circular cross section by means of Lorentz force to form a flat electron beam with a flat cross section under the condition so that an intensity of said flat electron beam per unit area is set higher than an intensity of said electron beam per unit area; and irradiating said flat electron beam onto a target, thereby generating an X-ray, wherein said flat electron beam is made by passing said electron beam between a pair of rectangular magnets that oppose one another, edges of said rectangular magnets being cut off to form tapered edges, respectively configured so that said electron beam is introduced between said pair of rectangular magnets from said tapered edges, and wherein a fringing magnet field is generated at said tapered edges of said pair of rectangular magnets to be curved outward from said tapered edges so that said Lorentz force is applied vertically to said electron beam between said pair of rectangular magnets.