Patent Number: 
Section: claims

1. An integrated X-ray source, comprising:a target for emitting X rays upon being struck by one or more excitation beams; andone or more total internal reflection multilayer optic devices in physical contact with the target to transmit at least a portion of the X rays through total internal reflection to produce X-ray beams, wherein each of the optic devices comprises an input face for receiving the X rays and an output face through which the X-ray beams exit the integrated X-ray source. 2. The integrated X-ray source of claim 1, wherein the optic devices comprise:a first graded multilayer section for redirecting and transmitting X rays through total internal reflection including;a high-index material layer comprising a first complex refractive index n1 having a real part Re (n1) and an imaginary part β1;a low-index material layer comprising a second complex refractive index n2 having a real part Re (n2) and an imaginary part β2; anda grading zone disposed between said high-index material layer and said low-index material layer, the grading zone having a grading layer comprising a third complex real refractive index n3 having a real part Re (n3) and an imaginary part β3 such that Re(n1)>Re(n3)>Re(n2). 3. The integrated X-ray source of claim 1, wherein the excitation beams comprise one or more of neutral particle beams, charged particle beams, or photon beams. 4. The integrated X-ray source of claim 1, wherein the target comprises a plurality of materials, and wherein at least one of the plurality of materials is an X-ray emitting material. 5. The integrated X-ray source of claim 4, wherein the X-ray emitting material comprises one or more heat removing materials, or electrical discharge removing materials, or both. 6. The integrated X-ray source of claim 4, wherein the X-ray emitting material comprises tungsten, rhodium, molybdenum, rhodium-molybdenum alloy, copper, diamond, radioactive americium, radioactive cobalt, and alloys thereof. 7. The integrated X-ray source of claim 6, wherein the low-index material layer comprises tungsten, osmium, copper, silver, molybdenum, rhodium, radioactive americium, radioactive cobalt, or chromium. 8. The integrated X-ray source of claim 1, wherein the target comprises a radioactive material. 9. The integrated X-ray source of claim 1, wherein the target comprises a plurality of layers disposed on the input face of the one or more optic devices, and wherein at least one of the plurality of layers comprises an X-ray emitting layer. 10. The integrated X-ray source of claim 9, wherein the target comprises at least one diamond layer, or at least one graphene layer disposed adjacent to the X-ray emitting layer. 11. The integrated X-ray source of claim 1, wherein one or more materials of the optic devices are configured to emit X-rays upon being struck by the excitation beams. 12. The integrated X-ray source of claim 1, wherein a cross-section of the optic devices is rectangular, circular, oval, square, or polygonal shape. 13. The integrated X-ray source of claim 1, wherein the target is enclosed within a housing having an X-ray transparent window, the one or more optic devices are mounted within the housing, mounted external to the housing, fabricated as the window, or integrated into the window. 14. The integrated X-ray source of claim 13, wherein the output face of each of the optic devices is mounted parallel to the window, or integrated into the window. 15. The integrated X-ray source of claim 1, wherein the X-ray beams are fan-shaped X-ray beams. 16. The integrated X-ray source of claim 1, wherein a cross-sectional area of the excitation beams is greater than a cross-sectional area of the target. 17. An integrated X-ray source, comprising:one or more total internal reflection multilayer optic devices that are configured to receive electrons, wherein the optic devices comprise at least one low-index material layer and at least one high-index material layer, wherein a target material is interspersed in the low-index material layer, wherein the target material is configured to produce X-rays upon being struck by one or more excitation beams, wherein the optic devices transmit at least a portion of the X rays through total internal reflection to produce X rays, and wherein each of the optic devices comprise an input face for receiving the X rays and an output face through which the X rays exit the integrated X-ray source. 18. The integrated X-ray source of claim 17, wherein the one or more excitation beams comprise one or more of neutral particle beams, charged particle beams, or photon beams. 19. The integrated X-ray source of claim 17, comprising two or more low-index material layers, wherein one or more low-index material layers comprise different materials. 20. The integrated X-ray source of claim 17, wherein the optic devices redirect the X-rays at energies above about 60 keV. 21. An X-ray imaging system, comprising:a source of one or more excitation beams;an integrated X-ray source, comprising:a target for emitting X-rays upon being struck by the excitation beams from the source; andone or more total internal reflection multilayer optic devices in direct physical contact with the target to transmit at least a portion of the X rays through total internal reflection to produce one or more X-ray beams, wherein the optic devices comprise an input face for receiving the X rays and an output face through which the X rays exit the integrated X-ray source. 22. The X-ray imaging system of claim 21, wherein the X-ray beams comprise fan-shaped beams, beams with circularly symmetric cross-sections, or beams with elliptical cross-sections.