Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Advanced LIGO Gravitational Wave Detector   The Advanced LIGO gravitational wave detectors will be installed starting in
2011, with completion scheduled for 2015. The new detectors will improve the
strain sensitivity of current instruments by a factor of ten, with a
thousandfold increase in the observable volume of space. Here we describe the
design and limiting noise sources of these second generation, long-baseline,
laser interferometers.

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The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
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The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn