Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Status Report on Double Chooz   Double Chooz main target is to measure Theta13 oscillation parameter by
comparing reactor neutrino fluxes in two identical detectors located
respectively at 400 m and 1 km away from the 2 Chooz reactor cores. The far
detector is now under construction, while we have just completed the design
phase of the near one. In this report I will discuss the detector principle,
sensitivity and its present construction status.

18
The categories of this paper are: econ
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg