Lanthanum and Cerium Hexaboride (LaB6 and CeB6) Cathodes Our Filaments and Cathodes can be used for multiple applications, including our Desktop SEM. The power supply for an auxiliary source for a typical indirectly heated emitter by bombardment would be 100 to 200 mA at several kilovolts. This is the purpose behind the electron gun; to provide a continuous beam of electrons which can be adjusted by the user. LaB6 FILAMENT Take Your Investigation to the Next Level with Lab6 Electron emission from a lanthanum hexaboride cathode, rather than a traditional tungsten hairpin filament, provides the … (c) Field emission. Electron emission from a lanthanum hexaboride cathode, rather than a traditional tungsten hairpin filament, provides the reassurance that every extra bit of image quality is there when … Please … According to the thermionic results the work function for the LaB 6 crystal increases in the sequence (346) < (100) < (110) < (111) and ranges from 2.41 to 2.90 eV. Additionally, due to their ⦠The LaB 6 crystals of the same face, but 2% smaller interior B/La, exhibit 0.1 to 0.2 eV larger work function values. benjamin moore silver mist living room Related Products. AEI/Cambridge V-Loop Filaments (10/Box) Share On Facebook. An accelerating voltage (fixed amount of negative high voltage) is applied to the surrounding cathode cap. 2.5 Name the three main parts of the thermionic emission electron gun. Electrons produced by heating a filament (Tungsten or LaB6) at voltages ranging from 60-120kV, are fired towards the sample down a column held under vacuum. Two electric propulsion concepts have been developed at Technische Universität Dresden as spin-off devices of regular hollow cathodes and initial testing has been conducted.
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