Patent Number: 
Section: claims

1. A Kratky assembly comprising:a first block made of crystal material with a first working surface, the working surface being flat and polished;a second block made of either crystal material or heavy element material with a second working surface, the first and second blocks being aligned with the first working surface pointing an opposite direction of the second working surface and the first working surface being aligned in a common plane with the second working surface. 2. The assembly of claim 1, wherein the second working surface is flat and polished. 3. The assembly of claim 1, wherein the first block has an extended bridge, and the second block being attached to the bridge with the second working surface being against a working surface of the bridge. 4. The assembly of claim 3, further comprising a beamstop and a bridge attached to the assembly being configured to position the beamstop. 5. The assembly of claim 3, wherein the first block and the extended bridge form a “U” shaped block with two arms extending from the first block, the “U” shaped block having a flat and polished surface extending from the working surface of the first block to the working surfaces of the two arms, where the second block is attached with the second working surface against the working surface of the bridge arms. 6. The assembly of claim 3, wherein the said second block is a blade attached to the bridge of the first block and the second working surface is an edge of the blade. 7. The assembly of claim 1, wherein the crystal material comprises a single crystal material. 8. The assembly of claim 7, the single crystal material is single crystal silicon. 9. The assembly of claim 7, the said single crystal material is single crystal germanium. 10. The assembly of claim 1, wherein the crystal material is mosaic crystal material. 11. A small angle x-ray system comprising:an x-ray source configured to generate a beam;an optic configured to direct the beam toward a sample;a detector configured to receive scattering of the beam from the sample;a first block made of crystal material with a first working surface, the working surface being flat and polished;a second block with a second working surface, the first and second blocks being aligned with the first working surface pointing an opposite direction of the second working surface and the first working surface being aligned in a common plane with the second working surface, the first block and the second block being positioned between the optic and the sample and being configured to form a parasitic scattering free zone after the sample and behind a plane defined by the either the first or second working surface nearest to the sample such that detector is able to collect data free from parasitic scattering in the parasitic scattering free zone. 12. The system of claim 11, wherein the first block has an extended bridge, the first working surface of the first block and a third working surface of the bridge where the second block is attached form a continuous flat surface and are in the common plane; and the second block being attached to the bridge with the second working surface being against the third working surface of the bridge. 13. The system of claim 12, further comprising an arm extended towards the detector, a beamstop being attached to the arm and positioned to block the beam. 14. The system of claim 12, wherein the first block and the extended bridge form a “U” shaped block with two arms extending from the first block, the “U” shaped block having a flat and polished surface extending from the working surface of the first block to the working surfaces of the two arms, where the second block is attached with the second working surface against the working surface of the bridge arms. 15. The system of claim 12, wherein the said second block is a blade attached to the bridge of the first block and the second working surface is an edge of the blade. 16. The system of claim 11, wherein the crystal material comprises a single crystal material. 17. The system of claim 11, wherein the crystal material is mosaic crystal material. 18. A Kratky assembly comprising:a first block with a first working surface, the working surface being flat and polished;a second block with a second working surface, the first and second blocks being aligned with the first working surface pointing an opposite direction of the second working surface and the first working surface being aligned in a common plane with the second working surface,an extension of the first block extending towards the detector and being configured to position a beamstop, the beamstop being attached to the extension and positioned to block a direct beam. 19. The assembly of claim 18, wherein the first block has an extended bridge, the first working surface of the first block and a third working surface of the bridge where the second block is attached form a continuous flat surface and are in the common plane; and the second block being attached to the bridge with the second working surface being against the third working surface of the bridge. 20. The assembly of claim 19, wherein the first block and the extended bridge form a “H” shaped block with two arms extending from the first block toward the second block and two arms extending from the first block toward the beamstop, the “H” shaped block having a flat and polished surface extending from the working surface of the first block to the working surfaces of the two arms extending toward the second block, where the second block is attached with the second working surface against the working surface of the two arms extending toward the second block.