Patent ID: 9666403
Date: 2017-05-30
CPC Classifications: H01J,H05G,H05H

Claim:
1. An X-ray source, comprising: a cylindrical resonant cavity with length, a diameter and a longitudinal axis extending from a first end of the cylindrical resonant cavity to a second end of the cylindrical resonant cavity; an electron gun located at the first end of the cylindrical resonant cavity; a metallic target coupled to the cylindrical resonant cavity adjacent to the second end of the cylindrical resonant cavity; a microwave field energizing system coupled to the cylindrical resonant cavity, the microwave field energizing system comprises two waveguides, each one having an end coupled to the cylindrical resonant cavity and the other end coupled to a microwave source; at least one magnetic field source that generates a magnetic field that increases along the longitudinal axis of the resonant cavity, starting from the first end of the cylindrical resonant cavity to the second end of the cylindrical resonant cavity; and a window transparent to X rays, the window being incorporated into a cylindrical surface of the cylindrical resonant cavity, the window being arranged in a common transverse plane with the target; wherein the length and diameter of the cylindrical resonant cavity meets a relationship according to the following expression: wherein: d is the length of the cylindrical resonant cavity; p is the subscript of the resonance mode of the cylindrical resonant cavity; f is the frequency of the microwave source; c is the speed of light in vacuum; and r is the diameter of the cylindrical resonant cavity/2.