Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comment on "Advanced field emission measurement techniques for research
  on modern cold cathode materials and their applications for transmission-type
  x-ray sources" [Rev. Sci. Instrum. 91, 083906 (2020)]   This Comment suggests that technological field electron emission (FE) papers,
such as the paper under discussion [P. Serbun et al.,, Rev. Sci. Instrum. 91,
083906 (2020)], should use FE theory based on the 1956 work of Murphy and Good
(MG), rather than a simplified version of FE theory based on the original 1928
work of Fowler and Nordheim (FN). Use of the 1928 theory is common practice in
technological FE literature, but the MG treatment is known to be better physics
than the FN treatment, which contains identifiable errors. The MG treatment
predicts significantly higher emission current densities and currents for
emitters than does the FN treatment. From the viewpoint of the research and
development of electron sources, it is counterproductive (and unhelpful for
non-experts) for the technological FE literature to use theory that undervalues
the performance of field electron emitters.

36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc