Abstract
Tungsten fuzz is a material formatted due to interaction of helium plasma with tungsten surface. This material consists of large number of thin nanostructures “growing” on the tungsten surface and having enhanced field emission properties. However, the calculation of field amplification factor from emission current-voltage characteristic gives large value which is not correlated with geometrical parameters of the nanostructures. Thermal field electron emission model that takes into account the Joule heating by emission current is presented in this work. This model predicts qualitatively similar current values corresponding to experiment and explains enhanced field amplification factor from the current-voltage characteristic.
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