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At present, many vacuum devices based on nanotechnology are widely used. The life time of the device depends mainly on the outgassing rate and the seal leak rate of the device. The leak rate is required to be less than 10−14Pam3/s in some application fields of long-life and high reliability devices. To solve this problem, the ultra-high vacuum leak detection apparatus with the lower limit of 10−16...
We have continued our investigation of the tunneling currents between CNTs dispersed randomly in the 3-dimensional potential of a dielectric medium. In addition to the configurations of CNTs which give a 2 orders of magnitude higher current than the standard tip to tip configuration studied previously we have discovered CNT configurations which do the opposite i.e. give currents which are 2 orders...
The classical equations for describing the electron current density due to field and thermal emission from planar surfaces are unsuitable for modern nanometer-scale emitters. The planar equations are often presented in the form of Murphy and Good who, in their seminal paper [1], provided a method for deriving both the Fowler-Nordheim (FN) and Richardson-Schottky (RS) equations for field and thermal...
A control circuit to stabilize the flux of electrons transmitted through an extractor electrode is presented. By controlling the emission current a fluctuation with a standard deviation of 0.015% is observed. However, the achievable stability of the transmitted electron current is limited due to a variation of the extraction grid current ratio showing a standard deviation of 4.33%. By regulating the...
We propose a mathematical model for calculation of performance of field-emission cells. Demonstrated model allow calculating electrical potential distribution, trajectories of the emitted electrons and cell currents. Three different constructions of cell were examined. The main important features for cell performance were defined through the model. We assume that using this model will allow to simplify...
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