Effect of acceleration voltage in eds on composition
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The contamination lowers the intensity of the measured x rays by lowering the average energy of the electron beam. This effect increases in magnitude as the accelerating potential of the beam is lowered, being on the order of 5 % for the elements Si and Mg in the K-411 glass microspheres analyzed at 5 kV.
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☑ Accelerating voltage (kV or keV) is the voltage difference between the filament and the anode which accelerates the electron beam towards the anode. The accelerating voltage (kV or High Tension) of a typical SEM ranges from 0 to 30kV.
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