High Energy X-ray Diffraction Microscopy (HEDM) - Materials ...

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Geometry Determination 1. Center 30 micron gold wire (absorption imaging) 2. Collect 3L data set from one layer 3. Back project peaks to locate rotation axis distances 4. Reconstruct using IceNine 5. Monte Carlo on geometry parameters: L’s, (j0, k0)’s,… • In principle, these parameters should be fixed • Mechanical drifts (or bumps) occur • Volume measurement macros use 3L layers every ~50 layers, 2L’s otherwise for speed • Degradation of reconstructions leads to additional p-MC
Calibration and Validation • 152(2) micron diameter Ruby sphere (NIST calibration standard) • Locate by absorption • 20 micron gold wire co-mounted
Page 1 and 2: High Energy X-ray Diffraction Micro
Page 3 and 4: Outline 1. Synchrotron radiation so
Page 5 and 6: HEDM Common Feature: Bragg Scatteri
Page 8 and 9: Magnetic Lattices as Sources Wiggle
Page 10 and 11: Undulator X-ray Source
Page 12 and 13: Specialized beam line requirements
Page 14 and 15: June 2012: Commissioning of new cam
Page 16 and 17: Data Flow
Page 20 and 21: Near-field Reconstruction: High pur
Page 22 and 23: Technique Verification: HEDM & EBSD
Page 24 and 25: NIST Single Crystal (?) Ruby Sphere
Page 26 and 27: Simulation of a small grain with or
Page 28 and 29: w Lineshapes w = 93 94 95 96 97 98
Page 30 and 31: Reconstruction compared to broadene
Page 32 and 33: Reconstruction compared to broadene
Page 34 and 35: Simulation Validation
Page 36 and 37: Statistics extraction from large da
Page 38 and 39: Misorientation axes: Ni(Bi) Red lin
Page 40 and 41: Near-field HEDM: Technique Summary
Page 42 and 43: Far-field measurements: Elastic Str

High Energy X-ray Diffraction Microscopy (HEDM) - Materials ...

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