Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A locking clamp that enables high thermal and vibrational stability for
  kinematic optical mounts   One of the main pursuits of the MagAO-X project is imaging planets around
nearby stars with the direct detection method utilizing an extreme AO system
and a coronagraph and a large telescope. The MagAO-X astronomical coronagraph
will be implemented on the 6.5 meter Clay Magellan Telescope in Chile. The 22
mirrors in the system require a high level of mirror stability. Our goal is
less than 1 microradian drift in tilt per mirror per one degree Celsius change
in temperature. There are no commercial 2inch kinematic optical mounts that are
truly "zero-drift" from 0-20C. Our solution to this problem was to develop a
locking clamp to keep our optics stable and fulfill our specifications. After
performing temperature variation and thermal shock testing, we conclude that
this novel locking clamp significantly increases the thermal stability of
stainless steel mounts by ~10x but still allows accurate microradian
positioning of a mirror. A provisional patent (#62/632,544) has been obtained
for this mount.

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The categories of this paper are: cond-mat
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
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The categories of this paper are: physics
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an