Method and apparatus for transmission of fluorescence X-ray radiation using a multilayer X-ray target

摘要

The present invention pertains to a method and apparatus for generating a beam of charged particles, accelerating the charged particles toward a first side of a layer of X-ray target material configured to emit Bremsstrahlung radiation through a second side, receiving the Bremsstrahlung radiation on a first face of an additional layer of a different X-ray target material configured to emit characteristic fluorescence X-rays with energy above 20 keV through a second face, wherein the additional layer of X-ray target material is located within 3 mm of the second side of the first layer of material. The first X-ray target material can have an atomic number greater than 21.

主权项

1. An X-ray source comprising:
a particle gun configured to emit a beam of charged particles along a predetermined path; a first target layer of a first material positioned in said path, wherein said first material has an atomic number greater than 21; a second target layer of a second material positioned within 3 mm from said first target layer on opposite side of said first target layer than said path, wherein said second material has at least one characteristic X-ray fluorescence energy above 20 keV; and an X-ray collimator configured for selective transmission of X-rays emitted by said second target layer at a predetermined non-zero angle from an axis of travel of said beam.