Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The ATLAS Inner Detector operation, data quality and tracking
  performance   The ATLAS Inner Detector is responsible for particle tracking in ATLAS
experiment at CERN Large Hadron Collider (LHC) and comprises silicon and gas
based detectors. The combination of both silicon and gas based detectors
provides high precision impact parameter and momentum measurement of charged
particles, with high efficiency and small fake rate. The ID has been used to
exploit fully the physics potential of the LHC since the first proton-proton
collisions at 7 TeV were delivered in 2009. The performance of track and vertex
reconstruction is presented, as well as the operation aspects of the Inner
Detector and the data quality during the many months of data taking.

34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ