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OPTIMUS™ TKD Detector Head

Bruker’s high performance e-Flash EBSD detector series can now be configured with the OPTIMUS™ TKD detector head which was specifically designed for best sample-detector geometry for Transmission Kikuchi Diffraction analysis (TKD) in SEM. The detector head not only acquires Kikuchi patterns with unmatched sensitivity, but even provides access to SAED (Selected Area Electron Diffraction) like patterns.

Orientation mapping with 3 nm spatial resolution

The horizontal phosphor screen's position beneath a sample has two major advantages compared to the vertical standard setup:

  • one order of magnitude stronger signal
  • lowest possible gnomonic projection distortions

The significantly stronger signal allows to acquire orientation maps with small apertures enabling best spatial resolution. Results on different materials showed that effective spatial resolution is 3 nm or even better. Working at low acceleration voltages down to 5 kV is also possible. This helps to reduce the mean free path and thus to increase the yield of Kikuchi diffraction signal. This is extremely useful when analyzing thin and “lightweight” samples. Distortions caused by gnomonic projection are a common issue in EBSD and especially affect TKD analysis when using the vertical phosphor screen. However, OPTIMUS™ TKD allows to exactly match the phosphor screen's center with the pattern center thus enabling best geometric conditions even compared to EBSD. The resulting Kikuchi patterns have minimum distortions which significantly improves band detection and subsequent indexing accuracy.

ARGUS™ FSE imaging system

OPTIMUS™ is equipped with the ARGUS™ imaging system that enables brilliant dark field and bright field imaging with details down to nanometer scale, practically transforming your SEM into a TEM. ARGUS™ can be used to display individual dislocations and networks of dislocation walls in deformed materials. The dark field images show 3D like information on boundary plane position and inclination.

Ease of use

Every existing e-Flash detector can be fitted with the OPTIMUS™ TKD detector head. The exchange can be easily done in less than 20 minutes by a trained user. This allows the easy and fast switch between EBSD and TKD mode whenever needed. OPTIMUS™ TKD features Bruker's advanced collision protection system: in the unlikely event of collision the detector immediately retracts at a speed of 10 mm/s which significantly reduces the risks of any damage. The OPTIMUS™ TKD detector head seamlessly works with Bruker’s TKD Professional Toolkit for SEM including TKD sample holder, the XFlash® EDS detector series for simultaneous TKD/EDS measurements and the ESPRIT 2 analytical software suite.

More info

OPTIMUS™ TKD detector head (PDF brochure)

ARGUS™– FSE/BSE imaging system (PDF flyer)

ARGUS™ application examples

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