Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Status of the ATF extraction line laser-wire   A new laser-wire is being installed in the extraction line of the ATF at KEK.
This device aims at demonstrating that laser-wires can be used to measure
micrometre scale beam size.

35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci