Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Line Spread Functions of Blazed Off-Plane Gratings Operated in the
  Littrow Mounting   Future soft X-ray (10 - 50 Angstrom) spectroscopy missions require higher
effective areas and resolutions to perform critical science that cannot be done
by instruments on current missions. An X-ray grating spectrometer employing
off-plane reflection gratings would be capable of meeting these performance
criteria. Off-plane gratings with blazed groove facets operated in the Littrow
mounting can be used to achieve excellent throughput into orders achieving high
resolutions. We have fabricated two off-plane gratings with blazed groove
profiles via a technique which uses commonly available microfabrication
processes, is easily scaled for mass production, and yields gratings customized
for a given mission architecture. Both fabricated gratings were tested in the
Littrow mounting at the Max-Planck-Institute for extraterrestrial Physics
PANTER X-ray test facility to assess their performance. The line spread
functions of diffracted orders were measured, and a maximum resolution of 800
$\pm$ 20 is reported. In addition, we also observe evidence of a `blaze' effect
from measurements of relative efficiencies of the diffracted orders.

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The categories of this paper are: stat
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: econ
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn