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FESEM ( Field Emission Scanning Electron Microscope )

Scanning electron microscopy permits the observation and characterization of materials on a nanometer to micrometer scale. SEM is popular because it can deliver a three dimensional image of the surface of a very wide range of materials. It is not too expensive to use and has a range of applications. Several types of signals are generated by the interaction of the electron beam with the material, and these include secondary electrons (topography), backscattered electrons (differentiation and phase diffraction) and characteristic x-ray (composition).

The Schottky eschottky field-emission source of electrons. The schottky emitter combines the high brightness and low energy spread of the cold field emitter with the high stability and low beam noise of thermal emitters. The instrument is equipped with about 100 times the emitting area as a cold emitter, and as a result, has much higher probe currents that give it an advantage for analytical applications. The electron gun is directly linked to a beam booster. This linkage eliminates, among other things, the crossover of electrons along the beam path, which aids in operating at very low beam.

LEO's unique variable pressure technology makes the LEO SUPRA 50VP the most versatile analytical FESEM currently available. The LEO SUPRA 50VP allows simultaneous EDS and WDS in high vacuum mode. The variable pressure mode adds the advantage of analyzing insulating specimens. The short working distance allows simultaneous acquisition of EDS, WDS, SE, BSD, CL and specimen current signals. The extended performance of the GEMINI column delivers ample beam current for the most demanding WDS analysis.

Application of variable pressure field emission remotely operationable scanning electron microscope

The Center has introduced the remote microscopy technique for Field Emission Scanning Electron Microscope and Rontec EDS system. Any user researcher outside Kuwait would like to use this facility can use this online and can get his result online as well.

 

Variable Pressure Field Emission Remotely Operationable SEM

Leo Supra 50VP FESEM has a lot of special features, namely

  1. Computer controlled remotely operationable.
  2. High resolution Cryo transfer system.
  3. Peltier cooled stage.
  4. Variable pressure (low & high) vacuum mode.
  5. 127 eV highest resolution (LN2 free) dry x-flash detector for EDS.
  6. Schottky field emission gun.
  7. 1.0 nm resolution.
  8. 400,000 counts per second processing microprocessor (highest).
  9. Quantax QX2 EDS system (light + heavy elements analysis).
  10. Cathodoluminescence.
  11. Infra red CCD Camera.
  12. High resolution X-ray spectroscopy close to room temperature.
  13. The unique variable pressure technology makes the SUPRA 50VP the most versatile analytical FESEM currently available.
  14. The SUPRA 50VP allows simultaneous EDS and WDS in high vacuum mode. Variable pressure mode adds the advantage of analysing insulating specimens. The short working distance allows simultaneous acquisition of EDS, WDS, SE, BSD,CL and specimen current signals. The extended performance of the GEMINI column delivers ample bean current for the most demanding WDS analysis.
  15. ltra high resolution over the complete accelerating voltage range:
  16. 1.3nm@ 15kV,2.1nm@1kV
  17. Superior resolution in VP mode :2nm@30kV
  18. Ultra stable high current GEMINI electron optics, 20nA, 0.2%/h
  19. Unique in-lens detector for clear topographic imaging in high vacuum mode
  20. Fully automated vacuum system with straight-forward point and click selection of vacuum
  21. Minimal specimen preparation for imaging and X-ray analysis
  22. Easy operation through Windows based SmartSEM control software