Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Field Electron Emission Induced Glow Discharge in Nanodiamond Vacuum
  Diode   The present letter extends the prior findings on self-induced heating of
solid state field emission devices. It was found that a vacuum diode (base
pressure $\sim10^{-9}$ Torr), that makes use of graphite-rich polycrystalline
diamond as cathode material, can switch from diode regime to resistor regime,
to glow discharge plasma regime without any external perturbation, i.e. all
transitions are self-induced. Combined results of in situ field emission
microscopy and ex situ electron microscopy and Raman spectroscopy suggested
that the nanodiamond cathode of the diode heated to about 3000 K which caused
self-induced material evaporation, ionization and eventually micro-plasma
formation. Our results confirm that field emission, commonly called cold
emission, is a very complex phenomenon that can cause severe thermal load.
Thermal load and material runaway could be the major factors causing vacuum
diode deterioration, i.e. progressive increase in turn-on field, decrease in
field enhancement factor, and eventual failure.

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The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: solv-int
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The categories of this paper are: stat
5
The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
2
The categories of this paper are: math
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The categories of this paper are: adap-org
9
The categories of this paper are: nlin
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: plasm-ph
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The categories of this paper are: supr-con