Dr. Thomas Duden

Development of Scientific Instruments - KSpaceNavigator
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Control Sphere Stereographic Projection Diffraction Pattern Wulff Shape Unit Cell

KSpaceNavigator is a software that brings together machine and crystallographic sample coordinates for diffraction experiments and electron microscopy. The coordinate information is displayed on a control sphere (left image) which can be moved with the mouse. Machine coordinates are represented by the grid on the sphere, the sample orientation by poles with Miller indices.

Sample-, model- and machine coordinates can be aligned by a few intuitive steps through the overlay of simulated and acquired diffraction data. If a known sample is used, the diffraction image is calibrated as well during the procedure. After the alignment, the sample tilt to indexed directions is greatly facilitated, which enables e.g. the observation of individual nano particles from different low index directions in the electron microscope.

Once the diffraction image scale is calibrated, polar orientations can also be triangulated from Laue rings in the diffraction image without prior crystallographic knowledge - this can save valuable time when radiation sensitive samples are modified by the beam or decompose.

A Shape builder module lets you assemble crystallites from specified facets. The resulting model can be overlaid to micrographs and is updating its view in multiple projections simultaneously when interfacial energies are changed.

The list below presents an overview over some of the presently available software features.

  • Display of Crystallographic Information from CIF Files
    • Orthographic Projektion with Drag-and-Drop
    • Stereographic Projection
    • Kinematically Simulated Diffraction Pattern
    • Kinematically Simulated Kikuchi Line Pattern
    • Crystallite Equilibrium Shape
  • Display of Microscope Data
    • Sample Stage Tilt Limits and Tilt Axes
    • Overlay of Calculated Diffraction Pattern with Diffraction Image from Microscope
    • Overlay of Wulff Model and Micrographs for Shape Analysis
    • Simultaneous Display of Wulff Model in Different Projection Directions
  • Analysis Capabilities
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    • Interactive Calibration of Camera Length
    • Interactive Alignment of Crystallographic Model and Sample
    • Calculation of Target Angles for any hkl with Aligned Model
    • Analysis of Angle-Axis Pair with two tilted Crystal Lattices
    • Interactive Shape Building and Analysis of Crystallites
    • Fast Triangulation to Polar Orientation from Laue Circle
  • Additional Features with Commercial Version
    • Linearization of Stage Goniometers
    • Control Of the Sample Tilts via TCP/IP
  • Output
    • Most Graphical Output is Available through the Clipboard in Excellent Quality
    • Most Numerical Results can be Saved in ASCII Text Files
  • System Requirements
    • The Software was tested on various Microsoft WindowsXP (R) und Microsoft Windows7 (R) Platforms
    • Minimum RAM used for testing 2 GB
    • A wheel mouse facilitates interactive facet building with the Wulff Plotter
  • Free Demonstration Version
    • The Demo Version of the Software is currently available for download.
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