About this Abstract |
Meeting |
6th International Congress on 3D Materials Science (3DMS 2022)
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Symposium
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6th International Congress on 3D Materials Science (3DMS 2022)
|
Presentation Title |
First Use of a Coded Aperture for Depth Resolved Scattering of a Pink Beam. |
Author(s) |
Jon Tischler, Doga Gursoy, Dina Sheyfer, Wenjun Liu, Michael Wojcik |
On-Site Speaker (Planned) |
Jon Tischler |
Abstract Scope |
We fabricated a coded aperture consisting of 7.5µm wide by 7.5µm thick gold bars deposited on a SiN membrane in a de Bruijn sequence. The de Bruijn sequence was 256 bits long and EVERY 8-bit sub-sequence is unique, thus by scanning the aperture perpendicular to the bars across the diffracted rays, only 120µm of motion was needed to uniquely identify where every ray intersected the aperture. This device was tested at the Advanced Photon Source beam line 34-ID-E and using an algorithm that we have developed we depth resolved the pink beam scattering from a polycrystalline Ni foil having a grain size of ~30 µm. We successfully reconstructed depth resolved scattering images from areas that were single crystal as well as a deformed region displaying diffraction peaks smeared over multiple degrees. We will show fully processed internal grain maps and compare them to measurements collected using the older wire-scan method. |
Proceedings Inclusion? |
Definite: Other |