Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Internal Smith-Purcell radiation and its interplay with Cherenkov
  diffraction radiation in silicon -- a combined time and frequency domain
  numerical study   We consider radiation generated by an electron travelling parallel to a
planar rectangular silicon grating: Smith-Purcell radiation to the vacuum side,
internal Smith-Purcell radiation into the dielectric, and Cherenkov radiation
into the dielectric. Internal Smith-Purcell radiation dominates over the other
two radiation mechanisms in the range where conventional Smith-Purcell
radiation is forbidden. This observation may lead to improved design of
contactless particle beam monitors.

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The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin