sem- schematic overview. electron detection tungsten filament electron source

Download SEM- Schematic Overview. Electron Detection Tungsten Filament Electron Source

Post on 13-Dec-2015




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SEM- Schematic Overview Slide 2 Electron Detection Slide 3 Tungsten Filament Electron Source Slide 4 Filament Emission Slide 5 Field Emission Gun Slide 6 Magnetic Lenses Slide 7 Focusing Optics Slide 8 Effect of Working distance Slide 9 Effect of Condenser Lense Slide 10 Aberations to Minimum Spot Size Slide 11 Slide 12 Voltage and Atomic Number Effect on Backscatter Electrons Slide 13 Monte Carlo Simulation and Secondary Electron Generation Slide 14 Electron- Atom Interaction Slide 15 X-ray Emission Slide 16 X-ray Generation Slide 17 Characteristic X-rays Characteristic radiation intensity is proportional to the tube current and the difference between the accelerating voltage and the excitation voltage. n ~ 1.5 Slide 18 X-ray Transitions Slide 19 Energy Spectrum for Pure Ni Slide 20 Auger Electron Spectroscopy Slide 21 Energy Versus Penetration Slide 22 Slide 23 SEM Operational Components Slide 24 Line Scan Process Slide 25 Pixel Element and Sample area Scanned Slide 26 Slide 27 Effect of Working Distance and Aperture on Depth of Focus ( in m) Slide 28 Slide 29 Electron Detector and Electron Sources Slide 30 Slide 31 Non Dispersive X-ray Detection Slide 32 Non Dispersive Detector Slide 33 Multichannel Analyzer Slide 34 Super Alloy X-ray Spectrum Slide 35 Peak Broadening Due to Resolution of Si Detector Slide 36 X-ray Energies 1-10 KeV Slide 37 Mid Energy K and L Spectra Slide 38 Bi M and Cu Spectra Slide 39 Common Interfering X-ray Lines Slide 40 EDS Spectra of Glass Slide 41 Wavelength Dispersive X-ray Detector Slide 42 Slide 43 Slide 44 X-ray Detection Gas Proportional CounterSingle Channel Pulse Height Detector Slide 45 Detector Output Slide 46 Wavelength Dispersive Spectra Slide 47 Comparison of EDS and WDS Slide 48 EDS Spectra of Glass Slide 49 WDS Spectra of High Z Glass Slide 50 Slide 51 Corrections to Measured X-ray Spectra Slide 52 X-ray Generation with Depth ( z) Slide 53 Absorption of X-rays Through Specimen Slide 54 Effect of Absorption on ( z)


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