Open AccessField electron emission from a nanostructured tungsten surface
Author(s) -
П. С. Михайлов,
I. L. Muzyukin
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2064/1/012059
Subject(s) - tungsten , field electron emission , materials science , anode , electron , current (fluid) , electric field , field (mathematics) , atomic physics , metallurgy , chemistry , electrode , physics , thermodynamics , mathematics , quantum mechanics , pure mathematics
In this paper, the electron emission from a nanostructured tungsten surface was investigated. A method for measuring an extremely low current (10 −12 – 10 −14 A) has been tested. It made possible to reduce the effect of the electric field on the sample surface and to minimize the probability of spontaneous breakdowns. For a detailed study of tungsten fuzz, a point tungsten anode (diameter 90 μm) was used. Field enhancement factor (β = 2000 – 3000) and effective emission area were calculated using the Fowler–Nordheim plots. The pre-breakdown current rise was studied. The emission current waveforms suggest the formation of several emission structures before the breakdown.