Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A three grating electron interferometer   We report the observation of fringes from a three grating electron
interferometer. Interference fringes have been observed at low energies ranging
from 6 keV to 10 keV. Contrasts of up to 25% are recorded and exceed the
maximal contrast of the classical equivalent, Moire deflectometer. This type of
interferometer could serve as a separate beam Mach-Zehnder interferometer for
low energy electron interferometry experiments.

37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int