Influence of current-voltage characteristic processing methods on the value of effective parameters of field cathodes

The paper analyzes the experimental current-voltage characteristics registered for a multitip nanocomposite field cathode based on carbon nanotubes. The analysis makes it possible to calculate effective estimates of the key parameters of field emission: the field enhancement factor and the emission area. A comparison of various approaches to analysis is presented, which include: various types of selection of a linear section on the current-voltage characteristic for constructing a trend line, various methods of averaging characteristics to eliminate the influence of the noise fluctuations, and the use of various coordinates for curve approximation.